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Area Codes 410 & 443
Telephone Central Office
Building Pictures
The following are representative examples of telephone central office buildings in Area Codes 410 & 443 (North & Eastern Maryland).
Click on the pictures below for a larger version.
Aberdeen
Listing Updated:
June 2010Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
ABRDMDABDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 272-3, 278, 297, 306, 575, 994Notes:
Serves parts of Edgewood & Fork
Annapolis
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
ANNPMDANDS0
ANNPMDANPS0Switch Type:
DS0: Nokia/Alcatel/Lucent 5ESS
PS0: Ribbon/Genband Packet SwitchPrefixes Served:
DS0: (410) 216, 260, 263, 267-9, 280, 295, 626, 990
(443) 476, 482
PS0: (410) 858Notes:
Serves parts of Severna Park. Packet switch will become the host for Baltimore Edmonson when the 1AESS is decommissioned in late 2011.
Source: GSV.
Annapolis
"Mayo"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
MAYOMDMYRS1Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(301) 205
(410) 798, 956
(443) 203Notes:
Serves parts of Washington Zone 14.
Source: GSV.
Annapolis
"Parole"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
PARLMDPADS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(301) 970
(410) 224, 266, 571, 573, 841, 849, 897, 946
(443) 481Notes:
Serves parts of Washington Zone 14, Severna Park & Sherwood Forest.
Source: GSV.
Annapolis
"St. Margarets"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
STMRMDSMRS1Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 349, 757, 974Notes:
Serves parts of Severna Park.
Source: GSV.
Arbutus
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
ARBTMDARDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 204, 242, 247, 368, 395, 469, 525, 536, 587, 644, 646, 737, 759, 801, 906
(443) 543Notes:
Serves parts of Baltimore.
Source: GSV.
Armiger-Gibson Island
"Armiger"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
ARMGMDARDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(410) 255, 360, 437, 439
(443) 770Notes:
Source: GSV.
Baltimore
"Brooklyn"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
BRKLMDBKDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 350, 354-5, 609, 636, 789Notes:
Serves parts of Brooklyn Park-Linthicum.
Source: GSV.
Baltimore
"Charles Street"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
BLTMMDCH1DD
BLTMMDCHDS2
BLTMMDCHDS3Switch Type:
1DD: Nokia/Alcatel/Lucent 5ESS
DS2: Nokia/Alcatel/Lucent 5ESS
DS3: Ribbon/Genband/Nortel DMS-100Prefixes Served:
1DD: (301) 878
(410) 217, 237, 291, 450, 481, 613DS2: (410) 209, 244, 328, 333, 359, 361, 396, 528, 545, 605, 637, 685, 706, 736, 962
(443) 220, 627, 984DS3: (301) 954
(410) 223, 230, 234, 332, 347, 385, 468, 470, 539, 547, 576, 625, 659, 727, 752, 783, 837, 895, 954, 986
(443) 263Notes:
Home to a number of CLEC and cellular switches and acts as a regional tandem. Serves parts of Washington Zone 4.
Source: GSV.
Baltimore
"Edmondson"
Listing Updated:
June 2010Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
BLTMMDEDRP0Switch Type:
Ribbon/Genband/Nortel CS2000 RemotePrefixes Served:
(410) 233, 362, 566, 624, 945, 947Notes:
This was one of three remaining 1AESS switches in all of Verizon and the only one left in Maryland. In January 2012, this switch was replaced with a Genand/Nortel CS2000 remote packet switch. The host switch will be in Annapolis. In other words, this CO completely bypassed a whole generation of digital TDM switching and will go from analog electronic to digital packet.
Baltimore
"Frankford"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
BLTMMDFRDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 325, 483, 485, 488, 866
(443) 868Notes:
Serves parts of Essex. Source: GSV.
Baltimore
"Hamilton"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
BLTMMDHMDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(410) 254, 319, 426, 444
(443) 885Notes:
Source: GSV
Baltimore
"Key Medical"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
BLTMMDKMRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 550Notes:
Source: GSV
Baltimore
"Liberty"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
BLTMMDLBDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(410) 367, 466, 542, 578, 601, 664Notes:
Source: GSV
Baltimore
"Madison"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
BLTMMDMDDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 225, 383, 462, 523, 669, 728, 767
(443) 552Notes:
Source: GSV
Baltimore
"University"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
BLTMMDUVDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(410) 235, 243, 261, 338, 366, 467, 516, 554, 662, 889
(443) 997Notes:
Source: GSV
Baltimore
"Wolfe"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
BLTMMDWLDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(410) 276, 327, 342, 502, 533, 534, 537. 558. 563, 614, 675, 732, 955
(443) 287
Notes:
Sourse: GSV
Baltimore
"York"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
BLTMMDYKDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(410) 323, 372, 377, 433, 435, 464, 532, 617Notes:
Serves parts of Towson. Source: GSV
Bel Air
Listing Updated:
June 2010Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
BLARMDBLDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(410) 420, 588, 638, 803, 836, 838, 877, 879, 893
(443) 643Notes:
Serves parts of Fork & Fallston
Berlin
"Main"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
BRLNMDBLRS1Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 629, 641Notes:
Source: GSV
Berlin
"Ocean Pines"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
OCPNMDCRRS1Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 208Notes:
Source: GSV
Bishopville
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
BSHPMDBPRS0Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 352Notes:
Source: GSV
Cambridge
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
CMBRMDCMDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 221, 228, 901Notes:
Source: GSV
Cardiff
Listing Updated:
June 2010Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
CRDFMDCDRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 399, 452, 983Notes:
Serves parts of Bel Air & Fork
Catonsville
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
CTVLMDCTDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 455, 719, 744, 747, 788, 869
(443) 612Notes:
Source: GSV
Cecilton
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
CCTNMDCLRS0Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 275, 755Notes:
Source: GSV
Centreville
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
CNVLMDCTRS2Switch Type:
Remote Switch (unknown type)Prefixes Served:
(410) 758
(443) 262Notes:
Source: GSV
Chase
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
CHASMDCHDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 335, 344Notes:
Source: GSV
Chesapeake City
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
CHCYMDCHRS0Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 885Notes:
Photo 2 source: Telebeans. Current photo source: GSV
Chestertown
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
CHRTMDCHDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 778, 810Notes:
Source: GSV
Churchville
Listing Updated:
June 2010Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
CCVLMDCHRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 734, 989Notes:
Serves parts of Fork
Cockeysville
"Main"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
CYVLMDCKDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(410) 252, 308, 453, 560-1, 628, 666-7, 683
(443) 841Notes:
Serves parts of Towson. Source: GSV
Cockeysville
"Hunt Valley"
Listing Updated:
July 2011Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
CYVLMDDADS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(410) 229, 316, 393, 527, 584, 771, 773, 785, 856
(443) 353, 556Notes:
Serves parts of Baltimore. Source: GSV
Columbia
"Main"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
CLMAMDCBDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(301) 307, 596
(410) 715, 720, 730, 740, 772, 884, 964, 992, 995, 997
(443) 367, 518, 546Notes:
Source: GSV
Columbia
"Owen Brown"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
CLMAMDOBDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(301) 310
(410) 309, 381, 505
(443) 259Notes:
Serves parts of Laurel & Ellicott City. Source: GSV
Columbia
"Snowden River"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
CLMAMDSRRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 312, 872, 953
(443) 285Notes:
Source: GSV
Crisfield
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
CRFDMDCRRS0Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 968Notes:
Source: GSV
Crofton
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
COTNMDCRDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(301) 261, 858
(410) 451, 721, 793Notes:
Serves parts of Washington Zone 14 & Severna Park. Source: GSV
Darlington
Listing Updated:
June 2010Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
DRTNMDDRRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 457Notes:
Deal Island
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
DLISMDDLRS0Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 784Notes:
Source: GSV
Del Mar
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
DLMRMDDMRS1Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 896Notes:
Source: GSV
Denton
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
DNTNMDDTRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 479Notes:
Source: GSV
Dundalk
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
DNDLMDDNDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(410) 282, 284-5, 288, 631, 633Notes:
Serves parts of Baltimore. Source: GSV
Easton
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
ESTNMDESDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(410) 763, 770, 819-20, 822Notes:
Source: GSV
Edgewood
Listing Updated:
June 2010Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
EDWDMDEGDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 417, 436, 538, 612, 671, 676, 679Notes:
Serves parts of Fork
Edgewood
"Winters Run"
Listing Updated:
June 2010Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
WNRNMDWNRS1Switch Type:
Digital Switch (type unknown)Prefixes Served:
(410) 515, 569
(443) 512Notes:
Serves parts of Fork
Elkridge
"Main"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
EKRGMDELDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 379, 407, 471, 503, 540, 579, 796, 799
(443) 755Notes:
Serves parts of Waterloo. Source: GSV
Elkridge
"Parkway"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
EKRGMDPKRS0Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 712, 782Notes:
Photo 2 source: Telebeans. Current photo source: GSV.
Elkton
Listing Updated:
April 2012Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
EKTNMDEKDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(410) 392, 398, 506, 620, 996Notes:
Ellicott City
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
ELCYMDELDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 203, 313, 418, 461, 465, 480, 750Notes:
Source: GSV
Essex
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
ESSXMDEXDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 238, 391, 574, 682, 686-7, 780, 918
(443) 777Notes:
Source: GSV
Federalsburg
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
FDBGMDFERS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 754Notes:
Source: GSV
Fork
Listing Updated:
June 2010Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
FORKMDFKRS1Switch Type:
Nokia/Alcatel/Lucent 5ESS EXMPrefixes Served:
(410) 405, 592-3, 817Notes:
Galena
Listing Updated:
July 2011Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
GALNMDGLRS0Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 648Notes:
Source: GSV
Glen Burnie
"Main"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
GLBRMDGLDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(410) 222, 424, 508, 553, 582, 590, 760-2, 766, 768, 787, 826, 863, 969
(443) 572Notes:
Serves parts of Severn. Source: GSV
Glen Burnie
"Friendship-Accident"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
FPATMDFRDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 684, 691, 694, 765, 850, 855, 859, 865, 892, 981, 993Notes:
Source: GSV
Greensboro
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
GNBOMDGRRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 482Notes:
Source: GSV
Hampstead
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
HMPSMDHERS1Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 239, 374Notes:
Source: GSV
Havre de Grace
Listing Updated:
June 2010Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
HDGRMDHVDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 939, 942
(443) 843Notes:
Hillsboro
"Tuckahoe"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
HLBOMDTKRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 364, 634Notes:
Serves parts of Ridgely. Source: GSV
Hurlock
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
HRLCMDHLRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 943Notes:
Source: GSV
Jarrettsville
Listing Updated:
June 2010Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
JRVLMDJERS0Switch Type:
Nokia/Alcatel/Lucent 5ESS ORMPrefixes Served:
(410) 557, 692, 941Notes:
Serves parts of Fork. The 941 office code has a greater calling area (two ratecenters in Pennsylvania) than the 692 office code.
Marion
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
MARNMDMARS1Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 623Notes:
Source: GSV
Millersville
"Dorrs Corner"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
DRCRMDDCDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(410) 514, 729, 923, 987Notes:
Serves parts of Severn. Source: GSV
Nanticoke
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
NNTCMDNTRS1Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 873Notes:
Source: GSV
North Beach
Listing Updated:
April 2010Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
NRBHMDNEDS0Switch Type:
Nokia/Alcatel/Lucent 5ESS HostPrefixes Served:
(301) 812, 855
(410) 257, 286Notes:
Also serves part of Washington Zone 15 in Area Code 301.
North East
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
NRTEMDNERS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 287
(443) 967Notes:
Photo 2 source: Telebeans. Current photo source: GSV
Ocean City
"Main"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
OCCYMDOCRS0Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 289Notes:
Source: GSV
Ocean City
"Montego Bay"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
OCCYMDMBRS1Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 250Notes:
Source: GSV
Ocean City
"North Ocean City"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
OCCYMDONDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 520 524, 723Notes:
Source: GSV
Ocean City
"West Ocean City"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
WOCYMDBARS0Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 213Notes:
Source: GSV
Odenton
"Main"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
ODTNMDONDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(301) 621, 912
(410) 305, 519, 551, 672, 674
(443) 734Notes:
Source: GSV
Odenton
"Piney Orchard"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
ODTNMDPORS2Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 695
(443) 274Notes:
Serves parts of Severn. Source: GSV
Oxford
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
OXFRMDOXRS0Switch Type:
Alctel/Lucent 5ESS RemotePrefixes Served:
(410) 226Notes:
Source: GSV
Parkton
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
PKTNMDPKRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 343, 357Notes:
Serves parts of Sparks-Glencoe. Source: GSV
Parkville
Listing Updated:
June 2010Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
PKVLMDPKDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 661, 663, 665, 668, 882Notes:
Photo 2 shows a sign you probably won't see for very much longer.
Parkville
"Perry Hall"
Listing Updated:
June 2010Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
PRHLMDPHDS0Switch Type:
Nokia/Alcatel/Lucent 5ESS HostPrefixes Served:
(410) 248, 256, 529Notes:
Parkville
"White Marsh"
Listing Updated:
June 2010Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
WHMRMDWMRS2Switch Type:
Nokia/Alcatel/Lucent 5ESS EXMPrefixes Served:
(410) 931, 933, 678Notes:
This Verizon building is in an office park that has several Comcast buildings.
Pikesville
"Main"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
PIVLMDPKDS1Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 205, 318, 358, 415, 484, 486, 580, 585, 602, 653, 764
(443) 357Notes:
Also serves parts of Baltimore rate center. Photo 2 source: Telebeans. Current photo source: GSV
Pikesville
"Owing Mills"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
OWMLMDOMDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 345, 356, 363, 504, 577, 581, 654, 902, 998
(443) 213, 394Notes:
Source: GSV
Pocomoke
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
PCCYMDPKRS0Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 957Notes:
Source: GSV
Port Deposit
"Bainbridge"
Listing Updated:
February 2005Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
BNBRMDBRRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 378, 642Notes:
Serves Port Deposit and parts of Perryville rate centers. Source: Telebeans
Prince Frederick
"Main"
Listing Updated:
April 2010Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
PRFRMDPFRS1Switch Type:
Nokia/Alcatel/Lucent 5ESS EXMPrefixes Served:
(301) 494
(410) 414, 535Notes:
Also serves part of Washington Zone 15 in Area Code 301.
Prince Frederick
"Mutual"
Listing Updated:
April 2010Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
MUTLMDMTRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS EXMPrefixes Served:
(410) 495, 586Notes:
Princess Anne
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
PRANMDPARS1Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 621, 651Notes:
Source: GSV
Queenstown
Listing Updated:
May 2018Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
QNTWMDQNRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 827Notes:
Source: GSV
Randallstown
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
RNTWMDRADS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(410) 496, 521, 655, 922Notes:
Photo 2 source: Telebeans. Current photo source: GSV
Reisterstown
"Glyndon"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
RSTWMDRSDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 429, 517, 526, 833, 861Notes:
Serves parts of Worthington
Rising Sun
Listing Updated:
June 2010Operating Company:
Armstrong Telephone CompanyCLLI:
RSSNMDXR0MDSwitch Type:
POI (unknown switch type)Prefixes Served:
(410) 658Notes:
The only independent telephone company in Maryland.
Rock Hall
Listing Updated:
July 2011Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
RKHLMDRHRS0Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 639Notes:
Source: GSV
Salisbury
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
SLBRMDSBDS1Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 219, 334, 341, 543, 546, 548, 572, 677, 742, 749, 860
(443) 260, 523Notes:
Source: GSV
Severna Park
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
SVPKMDSPDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(410) 315, 384, 421, 431-2, 518, 541, 544, 647, 975Notes:
Source: GSV
Silver Run
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
SLRNMDSLRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 346Notes:
Source: GSV
Snow Hill
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
SNHLMDSHRS0Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 631Notes:
Source: GSV
Solomons
Listing Updated:
April 2010Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
SLMNMDSLRS1Switch Type:
Nokia/Alcatel/Lucent 5ESS EXMPrefixes Served:
(410) 326, 394Notes:
Sparks-Glencoe
"Manor"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
MANRMDMNRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 472Notes:
Source: GSV
Sparrows Point
"North Point"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
NRPNMDNPDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(410) 388, 477Notes:
Source: GSV
St. Michaels
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
STMCMDSMRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 745Notes:
Source: GSV
Stevensville
"Main"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
STVLMDSTRS1Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 604Notes:
Source: GSV
Stevensville
"Romancoke"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
RMCKMDRRRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 643
(443) 249Notes:
Source: GSV
Sudlersville
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
SDVLMDSDRS0Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 438Notes:
Source: GSV
Taneytown
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
TNTWMDTNRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 751, 756Notes:
Source: GSV
Tighman
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
TLGHMDTLRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 886Notes:
Source: GSV
Towson
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
TWSNMDTWDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(410) 249, 296, 307, 321, 324, 337, 339, 494, 512, 583, 716, 769, 816, 821, 823, 825, 828, 830, 832, 847, 851, 853, 887, 938
(443) 652, 849Notes:
Source: GSV
Trappe
Listing Updated:
July 2011Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
TRPPMDTRRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 476Notes:
Source: GSV
Union Bridge
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
UNBRMDUBRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(410) 775Notes:
Source: GSV
Vienna
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
VINNMDVNRS0Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 376Notes:
Source: GSV
West River
"Galesville"
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
GLVLMDGLRS1Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(301) 889
(410) 867Notes:
Serves parts of Washington Zone 14. Source: GSV
Westminster
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
WMNSMDWMDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(410) 386, 840, 848, 857, 871, 875-6Notes:
Serves parts of Reisterstown and Sykesville. Source: GSV
Willards
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
WLRDMDWRRS1Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 835Notes:
Source: GSV
Wingate
Listing Updated:
July 2011Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
WNGTMDWGRS0Switch Type:
Ribbon/Genband/Nortel RLCPrefixes Served:
(410) 397-8xxxNotes:
Remote loop carrier for the 8000s block of the 397 prefix. Source: GSV
Wingate
"Honga"
Listing Updated:
July 2011Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
HONGMDHGRS0Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(410) 397-2xxx, 3-xxxxNotes:
Remote switching center serving the 2000s and 3000s block of the 397 prefix. Source: GSV
Woodlawn
Listing Updated:
February 2021Operating Company:
Verizon/Bell Atlantic/C&P of MarylandCLLI:
WDLWMDWLDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(301) 954
(410) 265, 277, 281, 298, 448, 594, 597, 944, 954, 965-6
(443) 436, 663Notes:
Source: GSV
Visit other Maryland Area Codes: 301 410
Visit nearby regions: Delaware District of Columbia Pennsylvania Virginia West Virginia
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