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Area Codes 410 & 443
Telephone Central Office Building Pictures

The following are respresntative 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 2010

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
ABRDMDABDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 272-3, 278, 297, 306, 575, 994

Notes:
Serves parts of Edgewood & Fork

 

Annapolis

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
ANNPMDANDS0
ANNPMDANPS0

Switch Type:
DS0: Alcatel/Lucent 5ESS
PS0: Genband Packet Switch

Prefixes Served:
DS0: (410) 216, 260, 263, 267-9, 280, 295, 626, 990
(443) 476, 482

PS0: (410) 858

Notes:
Serves parts of Severna Park. Packet switch will become the host for Baltimore Edmonson when the 1AESS is decomissioned in late 2011.
Source: GSV.

 

Annapolis

"Mayo"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
MAYOMDMYRS1

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(301) 205
(410) 798, 956
(443) 203

Notes:
Serves parts of Washington Zone 14.
Source: GSV.

 

Annapolis

"Parole"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
PARLMDPADS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(301) 970
(410) 224, 266, 571, 573, 841, 849, 897, 946
(443) 481

Notes:
Serves parts of Washington Zone 14, Severna Park & Sherwood Forest.
Source: GSV.
 

 

Annapolis

"St. Margarets"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
STMRMDSMRS1

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(410) 349, 757, 974

Notes:
Serves parts of Severna Park.
Source: GSV.

 

Arbutus

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
ARBTMDARDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 204, 242, 247, 368, 395, 469, 525, 536, 587, 644, 646, 737, 759, 801, 906
(443) 543

Notes:
Serves parts of Baltimore.
Source: GSV.

 

Armiger-Gibson Island

"Armiger"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
ARMGMDARDS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(410) 255, 360, 437, 439
(443) 770

Notes:
Source: GSV.

 

Baltimore

"Brooklyn"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
BRKLMDBKDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 350, 354-5, 609, 636, 789

Notes:
Serves parts of Brooklyn Park-Linthicum.
Source: GSV.

 

Baltimore

"Charles Street"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
BLTMMDCH1DD
BLTMMDCHDS2
BLTMMDCHDS3

Switch Type:
1DD: Alcatel/Lucent 5ESS
DS2: Alcatel/Lucent 5ESS
DS3: Genband/Nortel DMS-100

Prefixes Served:
1DD: (301) 878
          (410) 217, 237, 291, 450, 481, 613

DS2: (410) 209, 244, 328, 333, 359, 361, 396, 528, 545, 605, 637, 685, 706, 736, 962
          (443) 220, 627, 984

DS3: (301) 954
          (410) 223, 230, 234, 332, 347, 385, 468, 470, 539, 547, 576, 625, 659, 727, 752, 783, 837, 895, 954, 986
         (443) 263

Notes:
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 2010

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
BLTMMDEDRP0

Switch Type:
Genband/Nortel CS2000 (C20) Remote Switch

Prefixes Served:
(410) 233, 362, 566, 624, 945, 947

Notes:
This is one of three remaining 1AESS switches in all of Verizon and the only one left in Maryland. In January 2012, this switch will be 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:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
BLTMMDFRDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 325, 483, 485, 488, 866
(443) 868

Notes:
Serves parts of Essex. Source: GSV.

 

Baltimore

"Hamilton"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
BLTMMDHMDS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(410) 254, 319, 426, 444
(443) 885

Notes:
Source: GSV.

 

Baltimore

"Liberty"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
BLTMMDLBDS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(410) 367, 466, 542, 578, 601, 664

Notes:
Serves parts of x

 

Baltimore

"Madison"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
BLTMMDMDDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 225, 383, 462, 523, 669, 728, 767
(443) 552

Notes:
Source: GSV

 

Baltimore

"University"

Photo 2

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
BLTMMDUVDS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(410) 235, 243, 261, 338, 366, 467, 516, 554, 662, 889
(443) 997

Notes:
Photo 2 is the original central office. Source: GSV

 

Baltimore

"Wolfe"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
BLTMMDWLDS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(410) 276, 327, 342, 502, 533, 534, 537. 558. 563, 614, 675, 732, 955
(443) 287
 

Notes:
Sourse: GSV

 

Baltimore

"York"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
BLTMMDYKDS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(410) 323, 372, 377, 433, 435, 464, 532, 617

Notes:
Serves parts of Towson. Source: GSV

 

Bel Air

Listing Updated:
June 2010

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
BLARMDBLDS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(410) 420, 588, 638, 803, 836, 838, 877, 879, 893
(443) 643

Notes:
Serves parts of Fork & Fallston

 

Bishopville

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
BSHPMDBPRS0

Switch Type:
Genband/Nortel RSC

Prefixes Served:
(410) 352

Notes:
Source: GSV

 

Cambridge

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
CMBRMDCMDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 221, 228, 901

Notes:
Source: GSV

 

Cardiff

Listing Updated:
June 2010

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
CRDFMDCDRS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(410) 399, 452, 983

Notes:
Serves parts of Bel Air & Fork

 

Catonsville

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
CTVLMDCTDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 455, 719, 744, 747, 788, 869
(443) 612

Notes:
Source: GSV

 

Cecilton

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
CCTNMDCLRS0

Switch Type:
Genband/Nortel RSC

Prefixes Served:
(410) 275, 755

Notes:
Source: GSV

 

Chase

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
CHASMDCHDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 335, 344

Notes:
Source: GSV

 

Chesapeake City

Listing Updated:
June 2005

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
CHCYMDCHRS0

Switch Type:
Genband/Nortel RSC

Prefixes Served:
(410) 885

Notes:
Source: Telebeans

 

Chestertown

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
CHRTMDCHDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 778, 810

Notes:
Source: GSV

 

Churchville

Listing Updated:
June 2010

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
CCVLMDCHRS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(410) 734, 989

Notes:
Serves parts of Fork

 

Cockeysville

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
CYVLMDCKDS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(410) 252, 308, 453, 560-1, 628, 666-7, 683
(443) 841

Notes:
Serves parts of Towson. Source: GSV

 

Cockeysville

"Hunt Valley"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
CYVLMDDADS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(410) 229, 316, 393, 527, 584, 771, 773, 785, 856
(443) 353, 556

Notes:
Serves parts of Baltimore. Source: GSV

 

Columbia

"Owen Brown"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
CLMAMDOBDS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(301) 310
(410) 309, 381, 505
(443) 259

Notes:
Serves parts of Laurel & Ellicott City. Source: GSV
 

 

Crofton

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
COTNMDCRDS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(301) 261, 858
(410) 451, 721, 793

Notes:
Serves parts of Washington Zone 14 & Severna Park. Source: GSV

 

Darlington

Listing Updated:
June 2010

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
DRTNMDDRRS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(410) 457

Notes:
 

 

Deal Island

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
DLISMDDLRS0

Switch Type:
Genband/Nortel RSC

Prefixes Served:
(410) 784

Notes:
Source: GSV

 

Del Mar

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
DLMRMDDMRS1

Switch Type:
Genband/Nortel RSC

Prefixes Served:
(410) 896

Notes:
Source: GSV

 

Denton

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
DNTNMDDTRS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(410) 479

Notes:
Source: GSV

 

Dundalk

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
DNDLMDDNDS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(410) 282, 284-5, 288, 631, 633

Notes:
Serves parts of Baltimore. Source: GSV

 

Edgewood

Listing Updated:
June 2010

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
EDWDMDEGDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 417, 436, 538, 612, 671, 676, 679

Notes:
Serves parts of Fork

 

Edgewood

"Winters Run"

Listing Updated:
June 2010

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
WNRNMDWNRS1

Switch Type:
Digital Switch (type unknown)

Prefixes Served:
(410) 515, 569
(443) 512

Notes:
Serves parts of Fork

 

Elkridge

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
EKRGMDELDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 379, 407, 471, 503, 540, 579, 796, 799
(443) 755

Notes:
Serves parts of Waterloo. Source: GSV

 

Elkridge

"Parkway"

Listing Updated:
December 2005

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
EKRGMDPKRS0

Switch Type:
Genband/Nortel RSC

Prefixes Served:
(410) 712, 782

Notes:
Source: Telebeans

 

Elkton

Listing Updated:
April 2012

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
EKTNMDEKDS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(410) 392, 398, 506, 620, 996

Notes:
 

 

Ellicott City

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
ELCYMDELDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 203, 313, 418, 461, 465, 480, 750

Notes:
Source: GSV

 

Essex

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
ESSXMDEXDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 238, 391, 574, 682, 686-7, 780, 918
(443) 777

Notes:
Source: GSV

 

Federalsburg

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
FDBGMDFERS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(410) 754

Notes:
Source: GSV

 

Fork

Listing Updated:
June 2010

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
FORKMDFKRS1

Switch Type:
Alcatel/Lucent 5ESS EXM

Prefixes Served:
(410) 405, 592-3, 817

Notes:
 

 

Galena

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
GALNMDGLRS0

Switch Type:
Genband/Nortel RSC

Prefixes Served:
(410) 648

Notes:
Source: GSV

 

Glen Burnie

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
GLBRMDGLDS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(410) 222, 424, 508, 553, 582, 590, 760-2, 766, 768, 787, 826, 863, 969
(443) 572

Notes:
Serves parts of Severn. Source: GSV

 

Glen Burnie

"Frendship-Accident"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
FPATMDFRDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 684, 691, 694, 765, 850, 855, 859, 865, 892, 981, 993

Notes:
Source: GSV

 

Havre de Grace

Listing Updated:
June 2010

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
HDGRMDHVDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 939, 942
(443) 843

Notes:
 

 

Hillsboro

"Tuckahoe"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
HLBOMDTKRS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(410) 364, 634

Notes:
Serves parts of Ridgely. Source: GSV

 

Jarrettsville

Listing Updated:
June 2010

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
JRVLMDJERS0

Switch Type:
Alcatel/Lucent 5ESS ORM

Prefixes Served:
(410) 557, 692, 941

Notes:
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:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
MARNMDMARS1

Switch Type:
Genband/Nortel RSC

Prefixes Served:
(410) 623

Notes:
Source: GSV

 

Millersville

"Dorrs Corner"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
DRCRMDDCDS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(410) 514, 729, 923, 987

Notes:
Serves parts of Severn. Source: GSV

 

Nanticoke

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
NNTCMDNTRS1

Switch Type:
Genband/Nortel RSC

Prefixes Served:
(410) 873

Notes:
Source: GSV

 

North Beach

Listing Updated:
April 2010

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
NRBHMDNEDS0

Switch Type:
Alcatel/Lucent 5ESS Host

Prefixes Served:
(301) 812, 855
(410) 257, 286

Notes:
Also serves part of Washington Zone 15 in Area Code 301.

 

North East

Listing Updated:
July 2004

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
NRTEMDNERS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(410) 287
(443) 967

Notes:
Source: Telebeans

 

Ocean City

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
OCCYMDOCRS0

Switch Type:
Genband/Nortel RSC

Prefixes Served:
(410) 289

Notes:
Source: GSV

 

Ocean City

"North Ocean City"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
OCCYMDONDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 520 524, 723

Notes:
Source: GSV

 

Odenton

"Piney Orchard"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
ODTNMDPORS2

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(410) 695
(443) 274

Notes:
Serves parts of Severn. Source: GSV

 

Oxford

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
OXFRMDOXRS0

Switch Type:
Alctel/Lucent 5ESS Remote

Prefixes Served:
(410) 226

Notes:
Source: GSV

 

Parkton

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
PKTNMDPKRS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(410) 343, 357

Notes:
Serves parts of Sparks-Glencoe. Source: GSV

 

Parkville

Photo 2

Listing Updated:
June 2010

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
PKVLMDPKDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 661, 663, 665, 668, 882

Notes:
Photo 2 shows a sign you probably won't see for very much longer.

 

Parkville

"Perry Hall"

Listing Updated:
June 2010

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
PRHLMDPHDS0

Switch Type:
Alcatel/Lucent 5ESS Host

Prefixes Served:
(410) 248, 256, 529

Notes:
 

 

Parkville

"White Marsh"

Listing Updated:
June 2010

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
WHMRMDWMRS2

Switch Type:
Alcatel/Lucent 5ESS EXM

Prefixes Served:
(410) 931, 933, 678

Notes:
This Verizon building is in an office park that has several Comcast buildings.

 

Pikesville

Listing Updated:
June 2005

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
PIVLMDPKDS1

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 205, 318, 358, 415, 484, 486, 580, 585, 602, 653, 764
(443) 357

Notes:
Also serves parts of Baltimore rate center. Source: Telebeans

 

Pikesville

"Owing Mills"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
OWMLMDOMDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 345, 356, 363, 504, 577, 581, 654, 902, 998
(443) 213, 394

Notes:
Source: GSV

 

Port Deposit

"Bainbridge"

Listing Updated:
February 2005

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
BNBRMDBRRS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(410) 378, 642

Notes:
Serves Port Deposit and parts of Perryville rate centers. Source: Telebeans

 

Prince Frederick

Listing Updated:
April 2010

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
PRFRMDPFRS1

Switch Type:
Alcatel/Lucent 5ESS EXM

Prefixes Served:
(301) 494
(410) 414, 535

Notes:
Also serves part of Washington Zone 15 in Area Code 301.

 

Prince Frederick

"Mutual"

Listing Updated:
April 2010

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
MUTLMDMTRS0

Switch Type:
Alcatel/Lucent 5ESS EXM

Prefixes Served:
(410) 495, 586

Notes:
 

 

Queenstown

Listing Updated:
November 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
QNTWMDQNRS0

Switch Type:
Alcatel/Luent 5ESS Remote

Prefixes Served:
(410) 827

Notes:
Source: Parris Wood/TCO

 

Randallstown

Listing Updated:
June 2005

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
RNTWMDRADS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(410) 496, 521, 655, 922

Notes:
Source: Telebeans

 

Reisterstown

"Glyndon"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
RSTWMDRSDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 429, 517, 526, 833, 861

Notes:
Serves parts of Worthington

 

Rising Sun

Listing Updated:
June 2010

Operating Company:
Armstrong Telephone Company

CLLI:
RSSNMDXRDS0

Switch Type:
Nokia Siemens/Stromberg-Carlson DCO

Prefixes Served:
(410) 658

Notes:
The only independent telephone company in Maryland.

 

Rock Hall

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
RKHLMDRHRS0

Switch Type:
Genband/Nortel RSC

Prefixes Served:
(410) 639

Notes:
Source: GSV

 

Salisbury

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
SLBRMDSBDS1

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(410) 219, 334, 341, 543, 546, 548, 572, 677, 742, 749, 860
(443) 260, 523

Notes:
Source: GSV

 

Snow Hill

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
SNHLMDSHRS0

Switch Type:
Genband/Nortel RSC

Prefixes Served:
(410) 631

Notes:
Source: GSV

 

Sparrows Point

"North Point"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
NRPNMDNPDS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(410) 388, 477

Notes:
Source: GSV

 

Solomons

Listing Updated:
April 2010

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
SLMNMDSLRS1

Switch Type:
Alcatel/Lucent 5ESS EXM

Prefixes Served:
(410) 326, 394

Notes:
 

 

Stevensville

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
STVLMDSTRS1

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(410) 604

Notes:
Source: GSV

 

Tighman

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
TLGHMDTLRS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(410) 886

Notes:
Source: GSV

 

Towson

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
TWSNMDTWDS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes 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, 849

Notes:
Source: GSV

 

Trappe

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
TRPPMDTRRS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(410) 476

Notes:
Source: GSV

 

Union Bridge

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
UNBRMDUBRS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(410) 775

Notes:
Source: GSV

 

West River

"Galesville"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
GLVLMDGLRS1

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(301) 889
(410) 867

Notes:
Serves parts of Washington Zone 14. Source: GSV

 

Westminster

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
WMNSMDWMDS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(410) 386, 840, 848, 857, 871, 875-6

Notes:
Serves parts of Reisterstown and Sykesville. Source: GSV

 

Willards

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
WLRDMDWRRS1

Switch Type:
Genband/Nortel RSC

Prefixes Served:
(410) 835

Notes:
Source: GSV

 

Wingate

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
WNGTMDWGRS0

Switch Type:
Genband/Nortel RLC

Prefixes Served:
(410) 397-8xxx

Notes:
Remote loop carrier for the 8000s block of the 397 prefix. Source: GSV

 

Wingate

"Honga"

Listing Updated:
July 2011

Operating Company:
Verizon/Bell Atlantic/C&P of Maryland

CLLI:
HONGMDHGRS0

Switch Type:
Genband/Nortel RSC

Prefixes Served:
(410) 397-2xxx, 3-xxxx

Notes:
Remote switching center serving the 2000s and 3000s block of the 397 prefix.  Source: GSV

 

 


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