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Area Codes 303 & 720
Telephone Central Office
Building Pictures
The following are representative examples of telephone central office buildings in Area Codes 303 & 720 (Colorado).
Click on the pictures below for a larger version.
Deer Trail
Listing Updated:
March 2020Operating Company:
Bijou Telephone CooperativeCLLI:
(was DRTRCOXCRS1)Switch Type:
Ribbon/Genband/Nortel 1REPrefixes Served:
(303) 769Notes:
Source: GSV
Denver
"Main"
Listing Updated:
August 2012Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
DNVRCOMADS0
DNVRCOMADS4
DNVRCOMADS9Switch Type:
DS0: Nokia/Alcatel/Lucent 5ESS
DS4: ACD
DS9: Nokia/Alcatel/Lucent 5ESSPrefixes Served:
DS0: (303) 260, 352, 389, 405, 436, 446, 454, 534, 556, 571-3, 575, 585, 592, 595, 602-3, 605-8, 615, 620, 623-4, 626, 628-31, 633-4, 640, 685, 820, 825, 844, 892-3, 899
(720) 359, 362, 931, 944
DS4: (303) 787
DS9: (720) 904, 932, 946, 956Notes:
Source: Nathan H.
Denver
"East"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
DNVRCOEADS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(303) 270, 314-6, 320-2, 329, 331, 333, 336, 355, 370, 372, 377, 388, 393-4, 398-9, 780
(720) 941-2, 945Notes:
Source: GSV
Denver
"North"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
DNVRCONODS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(303) 433, 455, 477, 480, 561, 964
(720) 854-5Notes:
Source: GSV
Denver
"Northeast"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
DNVRCONEDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(303) 227, 286-9, 853
(720) 322Notes:
Source: GSV
Denver
"South"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
DNVRCOSODS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(303) 281-2, 698, 715, 722, 733, 744, 765, 777-8, 871
(720) 570Notes:
Source: GSV
Denver
"Southeast"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
DNVRCOSEDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(303) 300, 504, 512, 584, 639, 691-2, 753, 756-9, 782
(720) 242, 524Notes:
Source: GSV
Denver
"Southwest"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
DNVRCOSWDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(303) 716, 763, 914, 969, 980, 984-9
(720) 962-3Notes:
Source: GSV
Denver
"West"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
DNVRCOWSDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(303) 727, 742, 922, 934-7, 975
(720) 884Notes:
Source: GSV
Denver
"Arvada"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
ARVDCOMADS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(303) 403, 420-5, 431-2, 456, 463, 467, 940
(720) 898Notes:
Source: GSV
Denver
"Aurora"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
AURRCOMADS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(303) 326, 340-1, 343-4, 360-1, 363-7, 676-7, 724, 739, 553, 777, 847-8, 857-9Notes:
Source: GSV
Denver
"Boulder - Main"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
BLDRCOMADS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(303) 245, 247, 401-2, 413, 415, 417, 440-4, 447-9, 473, 492, 541, 544-6, 735, 786, 924, 938-9, 966, 998
(720) 406, 561-5Notes:
Source: GSV
Denver
"Boulder - Gunbarrel"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
BLDRCOGBRS1Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(303) 516, 527, 530, 581
(720) 622Notes:
Source: GSV
Denver
"Broomfield"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
BRFDCOMADS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(303) 272, 404, 410, 438-9, 460, 464-6, 469, 533, 635
(720) 558, 566, 887Notes:
Source: GSV
Denver
"Capitol Hill"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
DNVRCOCHDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(303) 318, 764, 812-3, 830-2, 837, 839, 860-1, 863-4, 869, 894
(720) 423-4, 426, 917, 947Notes:
Source: GSV
Denver
"Castle Rock"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
CSRKCONMDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(303) 660, 663, 688, 814
(720) 455, 733Notes:
Source: GSV
Denver
"Central City"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
CNCYCOMARS1Switch Type:
Ericsson AXE-10 RemotePrefixes Served:
(303) 582Notes:
Source: GSV
Denver
"Columbine"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
DNVRCOCLDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(303) 904, 932-3, 948, 971-3, 977-9
(720) 922, 981Notes:
Source: GSV
Denver
"Curtis Park"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
DNVRCOCPDS0Switch Type:
Nokia/Alcatel/Lucent 5ESPrefixes Served:
(303) 244, 291-9, 308, 312-3, 380, 382-3, 391, 672, 675, 896, 965, 992
(720) 264, 578Notes:
Source: GSV
Denver
"Dry Creek"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
DNVRCODCDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(303) 220-1, 224, 265, 267, 290, 486, 488, 689, 694, 712-4, 721, 737, 740-1, 770-1, 773, 779, 793, 796, 804, 843, 846, 850, 889, 930, 967
(720) 489, 528, 536, 554Notes:
Source: GSV
Denver
"Englewood"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
ENWDCOMADS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(303) 761-2, 781, 783, 788-9, 806
(720) 833Notes:
Source: GSV
Denver
"Erie"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
ERIECOMARS1Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(303) 828Notes:
Source: GSV
Denver
"Evergreen"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
EVRGCOMADS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(303) 670, 674, 679Notes:
Source: GSV
Denver
"Frederick"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
FRDRCOMADS0Switch Type:
Ribbon/Genband/Nortel DMS-10Prefixes Served:
(303) 833Notes:
Source: GSV
Denver
"Golden"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
GLDNCOMADS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(303) 215-6, 271, 273, 277-9, 384, 982
(720) 497Notes:
Source: GSV
Denver
"Idaho Springs"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
IDSPCOMADS0Switch Type:
Ericsson AXE-10 HostPrefixes Served:
(303) 567Notes:
Source: GSV
Denver
"Lakewood"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
LKWDCOMADS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(303) 202, 205, 231-9, 274-5, 445, 462
(720) 321, 544Notes:
Source: GSV
Denver
"Larkspur"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
LRKSCONMRS1Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(303) 681Notes:
Source: GSV
Denver
"Littleton Main"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
LTTNCOMADS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(303) 347, 658, 703, 707, 730, 734, 738, 794-5, 797-8
(720) 283Notes:
Source: GSV
Denver
"Montebello"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
DNVRCOMBDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(303) 307, 371, 373, 375, 574, 576
(720) 374Notes:
Source: GSV
Denver
"Nederland"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
NDLDCOMARS1Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(303) 258Notes:
Source: GSV
Denver
"Northglenn"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
NGLNCOMADS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(303) 252, 254-5, 280, 450-3, 457, 538, 920
(720) 627, 872, 929, 972, 977Notes:
Source: GSV
Denver
"Smoky Hill"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
DNVRCOSHDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(303) 269, 400, 617, 627, 680, 690, 693, 699, 766
(720) 870, 876, 886Notes:
Source: GSV
Denver
"Sullivan"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
DNVRCOSLDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(303) 283, 306, 337-8, 368-9, 614, 636, 671, 695-6, 743, 745, 750-2, 755, 873
(720) 744, 747-8Notes:
Source: GSV
Denver
"Table Mesa"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
TEMACOMADS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(303) 494, 497, 499, 543, 554
(720) 304Notes:
Source: GSV
Denver
"Ward"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
WARDCOMARS1Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(303) 459Notes:
Source: GSV
Denver
"Westminster"
Listing Updated:
December 2016Operating Company:
CenturyLink/Qwest/US West/Mountain BellCLLI:
WMNSCOMADS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(303) 412, 426-30, 487, 650, 657
(720) 540, 542Notes:
Source: GSV
Strasburg
Listing Updated:
March 2020Operating Company:
TDS/Strasburg Telephone CompanyCLLI:
STBGCOXCDS0Switch Type:
Ribbon/Genband/Nortel DMS-10Prefixes Served:
(303) 622Notes:
Source: GSV
Visit other Colorado Area Codes: 303 719 970
Visit nearby regions: Arizona Kansas Nebraska New Mexico Oklahoma Utah Wyoming
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Pictures |