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Area Code 303
Telephone Central Office
Building Pictures
The following are representative examples of telephone central office buildings in Area Code 303 (with overlay Area Codes 720 and 983) (Denver metro, Colorado).
Click on the pictures below for a larger version.
Allens Park-Lyons
"Allens Park"
Listing Updated:
August 2023Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
ALPKCOMARS3Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(303) 747Notes:
Source: GSV
Allens Park-Lyons
"Lyons"
Listing Updated:
May 2024Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
LYNSCOMARS1Switch Type:
Ericsson AXE-10 RemotePrefixes Served:
(303) 823Notes:
Source: GSV
Bennett
Listing Updated:
May 2023Operating Company:
Eastern Slope TechnologiesCLLI:
BNNTCOXCDS0Switch Type:
Ribbon/Genband/Nortel DMS-10 HostPrefixes Served:
(303) 644Notes:
Source: GSV
Byers
Listing Updated:
June 2023Operating Company:
Bijou Telephone Co-opCLLI:
BYRSCOXCDS0Switch Type:
Ribbon/Genband/Nortel DMS-10 HostPrefixes Served:
(303) 769, 822Notes:
Also serves the Deer Trail ratecenter. Source: GSV
Deckers
"Main"
Listing Updated:
September 2021Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
DCKRCOMARS1Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(303) 647Notes:
Source: GSV
Deckers
"Bailey"
Listing Updated:
June 2023Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
BALYCOMADS1Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(303) 816, 838
(720) 924Notes:
Source: GSV
Deer Trail
Listing Updated:
June 2023Operating Company:
Bijou Telephone CooperativeCLLI:
(was DRTRCOXCRS1)Switch Type:
(was Ribbon/Genband/Nortel 1RE)Prefixes Served:
(303) 769Notes:
Now a node off of Byers DMS-10. Source: GSV
Denver
"Denver Main"
Listing Updated:
May 2024Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
DNVRCOMADS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(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, 787, 820, 825, 844, 892-3, 899
(720) 337, 359, 362, 904, 931-2, 944, 946, 956Notes:
Current photo source: GSV. Photos 2-6:: Nathan H. (August 2012)
Denver
"Denver Capitol Hill"
Listing Updated:
May 2024Operating Company:
Lumen/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
"Denver Columbine"
Listing Updated:
November 2023Operating Company:
Lumen/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
"Denver Cottonwood"
Listing Updated:
September 2023Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
DNVRCOCWDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(303) 604, 661, 664-6, 673, 926
(720) 890Notes:
Source: GSV
Denver
"Denver Curtis Park"
Listing Updated:
May 2024Operating Company:
Lumen/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
"Denver Dry Creek"
Listing Updated:
October 2024Operating Company:
Lumen/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
"Denver East"
Listing Updated:
October 2023Operating Company:
Lumen/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
"Denver Montebello"
Listing Updated:
August 2023Operating Company:
Lumen/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
"Denver North"
Listing Updated:
November 2021Operating Company:
Lumen/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
"Denver Northeast"
Listing Updated:
August 2022Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
DNVRCONEDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(303) 227, 286-9, 853
(720) 322Notes:
Source: GSV
Denver
"Denver Smoky Hill"
Listing Updated:
May 2023Operating Company:
Lumen/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
"Denver South"
Listing Updated:
June 2024Operating Company:
Lumen/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
"Denver Southeast"
Listing Updated:
November 2024Operating Company:
Lumen/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
"Denver Southwest"
Listing Updated:
August 2022Operating Company:
Lumen/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
"Denver Sullivan"
Listing Updated:
August 2023Operating Company:
Lumen/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
"Denver West"
Listing Updated:
January 2023Operating Company:
Lumen/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:
February 2022Operating Company:
Lumen/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 Main"
Listing Updated:
April 2024Operating Company:
Lumen/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
"Aurora Monaghan"
Listing Updated:
July 2021Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
AURRCOMBRS1Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(303) 261Notes:
Source: GSV
Denver
"Boulder Main"
Listing Updated:
June 2024Operating Company:
Lumen/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:
June 2024Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
BLDRCOGBRS1Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(303) 516, 527, 530, 581
(720) 622Notes:
Source: GSV
Denver
"Brighton"
Listing Updated:
September 2022Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
BITNCOMADS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(303) 637, 654-5, 659
(720) 523, 685Notes:
Source: GSV
Denver
"Broomfield"
Listing Updated:
March 2022Operating Company:
Lumen/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
"Castle Rock"
Listing Updated:
November 2021Operating Company:
Lumen/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:
October 2023Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
CNCYCOMARS1Switch Type:
Ericsson AXE-10 RemotePrefixes Served:
(303) 582Notes:
Source: GSV
Denver
"Coal Creek"
Listing Updated:
May 2023Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
CCCNCOMADS0Switch Type:
Ribbon/Genband/Nortel DMS-10Prefixes Served:
(303) 642Notes:
Source: GSV
Denver
"Elizabeth"
Listing Updated:
May 2024Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
ELZBCO01DS1Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(303) 646Notes:
Source: GSV
Denver
"Englewood Main"
Listing Updated:
November 2024Operating Company:
Lumen/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
"Englewood Aberdeen"
Listing Updated:
November 2024Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
ENWDCOABDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(303) 397, 643, 645, 649, 662, 705-6, 708, 754, 768, 784, 790, 792, 799, 858, 925
(720) 267-8, 568, 852, 873-5, 895Notes:
Source: GSV
Denver
"Erie"
Listing Updated:
August 2012Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
ERIECOMARS1Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(303) 828Notes:
Source: GSV
Denver
"Evergreen"
Listing Updated:
May 2023Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
EVRGCOMADS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(303) 670, 674, 679Notes:
Source: GSV
Denver
"Frederick"
Listing Updated:
June 2021Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
FRDRCOMADS0Switch Type:
Ribbon/Genband/Nortel DMS-10Prefixes Served:
(303) 833Notes:
Source: GSV
Denver
"Golden"
Listing Updated:
September 2023Operating Company:
Lumen/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:
May 2023Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
IDSPCOMADS0Switch Type:
Ericsson AXE-10 HostPrefixes Served:
(303) 567Notes:
Source: GSV
Denver
"Lakewood"
Listing Updated:
January 2023Operating Company:
Lumen/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:
June 2023Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
LRKSCONMRS1Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(303) 681Notes:
Source: GSV
Denver
"Littleton Main"
Listing Updated:
October 2022Operating Company:
Lumen/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
"Littleton Highlands Ranch"
Listing Updated:
November 2022Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
LTTNCOHLDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(303) 346, 470-1, 683, 791
(720) 344, 348, 516Notes:
Source: GSV
Denver
"Lookout Mountain"
Listing Updated:
May 2023Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
LKMTCOMADS1Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(303) 526
(720) 746Notes:
Source: GSV
Denver
"Morrison"
Listing Updated:
May 2023Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
MRSNCOMARS1Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(303) 697Notes:
Source: GSV
Denver
"Nederland"
Listing Updated:
September 2023Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
NDLDCOMARS1Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(303) 258Notes:
Source: GSV
Denver
"Northglenn"
Listing Updated:
August 2022Operating Company:
Lumen/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
"Parker"
Listing Updated:
June 2023Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
PRKRCOMADS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(303) 805, 840-1
(720) 842, 851Notes:
Source: GSV
Denver
"Table Mesa"
Listing Updated:
June 2024Operating Company:
Lumen/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:
September 2024Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
WARDCOMARS1Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(303) 459Notes:
Source: GSV
Denver
"Westminster"
Listing Updated:
August 2022Operating Company:
Lumen/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
Denver
"AT&T Tandem"
Listing Updated:
May 2024Operating Company:
AT&T Long LinesCLLI:
DNVRCOZJ05TSwitch Type:
Nokia Next Generation 4ESS (N4E)Prefixes Served:
(none)Notes:
Houses the AT&T tandem for the Denver, CO region (originally a 4ESS) Source: GSV
Fort Lupton
Listing Updated:
October 2022Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
FTLPCOMADS0Switch Type:
Ericsson AXE-10Prefixes Served:
(303) 857Notes:
Source: GSV
Georgetown
Listing Updated:
October 2023Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
GRTWCOMARS1Switch Type:
Ericsson AXE-10 RemotePrefixes Served:
(303) 569Notes:
Source: GSV
Hudson
Listing Updated:
April 2023Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
HDSNCOMARS1Switch Type:
Ericsson AXE-10 RemotePrefixes Served:
(303) 536Notes:
Source: GSV
Keenesburg
Listing Updated:
November 2021Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
KNBGCOMARS1Switch Type:
Ericsson AXE-10 RemotePrefixes Served:
(303) 732Notes:
Source: GSV
Longmont
"Main"
Listing Updated:
June 2024Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
LNMTCOMADS1Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(303) 485, 651, 678, 682, 684, 702, 772, 774, 776
(720) 494, 652, 718, 864Notes:
Source: GSV
Longmont
"Niwot"
Listing Updated:
June 2024Operating Company:
Lumen/CenturyLink/Qwest/US West/Mountain BellCLLI:
NIWTCOMADS0Switch Type:
Ribbon/Genband/Nortel DMS-10Prefixes Served:
(303) 652Notes:
Source: GSV
Roggen
Listing Updated:
September 2021Operating Company:
Roggen Telephone Cooperative CompanyCLLI:
RGGNCOXCDS0Switch Type:
Ribbon/Genband/Nortel DMS-10Prefixes Served:
(303) 849Notes:
Source: GSV
Strasburg
Listing Updated:
May 2023Operating Company:
TDS/Strasburg Telephone CompanyCLLI:
STBGCOXCPS0Switch Type:
Packet End Office (unknown type)Prefixes Served:
(303) 622Notes:
Originally a DMS-10, now a packet switch. Source: GSV
Visit other Colorado Area Codes: 303 719 970
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Copyright 2024 Telephone Central Office Building
Pictures |