Area Code 423
Telephone Central Office Building Pictures

The following are representative examples of telephone central office buildings in Area Code 423 (southeastern Tennessee).

Click on the pictures below for a larger version.

Athens Photo 2	Listing Updated: July 2021 Operating Company: at&t/BellSouth/South Central Bell CLLI: ATHNTNMADS0 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (423) 507, 649, 744-6 Notes: Photo 2 source: Larry P. (August 2015). Current photo source: GSV
Benton Photo 2	Listing Updated: July 2021 Operating Company: at&t/BellSouth/South Central Bell CLLI: BNTNTNMTRS0 Switch Type: Nokia/Alcatel/Lucent 5ESS Remote Prefixes Served: (423) 338 (706) 328 Notes: Also serves Tennga, GA. Photo 2 source: Larry P. (September 2016). Current photo source: GSV
Blountville Photo 2	Listing Updated: September 2012 Operating Company: Brightspeed/Centurylink/Embarq/Sprint/United Telephone CLLI: BUVLTNXARS0 Switch Type: Ribbon/Genband/Nortel RSC Prefixes Served: (423) 279, 323, 325, 354, 917 Notes: Photo 2 source: Craig L. (September 2012). Current photo source: GSV
Bulls Gap Photo 2	Listing Updated: September 2012 Operating Company: at&t/BellSouth/South Central Bell CLLI: BLGPTNMARS0 Switch Type: Nokia/Siemens EWSD RSU Prefixes Served: (423) 235, 601 Notes: Photo 2 source: Larry P. (September 2012). Current photo source: GSV
Charleston Photo 2	Listing Updated: August 2015 Operating Company: at&t/BellSouth/South Central Bell CLLI: CHTNTNMTRS0 Switch Type: Nokia/Alcatel/Lucent 5ESS Remote Prefixes Served: (423) 336, 780 Notes: Source: Larry P.
Chattanooga "Brainerd" Photo 2 | Photo 3	Listing Updated: July 2021 Operating Company: at&t/BellSouth/South Central Bell CLLI: CHTGTNBRDS0 Switch Type: Nokia/Alcatel/Lucent 5ESS Prefixes Served: (423) 296, 485, 490, 499, 510, 553, 846, 855, 892-4, 899, 954 (706) 891 Notes: Photo 2 is from July 2008. Photo 3 is from March 2006 (when this was a BellSouth office.)
Chattanooga "Dodds" Photo 2	Listing Updated: July 2021 Operating Company: at&t/BellSouth/South Central Bell CLLI: CHTGTNDTDS0 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (423) 493, 495, 622, 624, 629, 697-8 Notes: Photo 2 from March 2006. Current photo source: GSV. CO building is behind a fence behind a business.
Chattanooga "Harrison" Photo 2	Listing Updated: July 2021 Operating Company: at&t/BellSouth/South Central Bell CLLI: CHTGTNHTDS0 Switch Type: Nokia/Alcatel/Lucent 5ESS Prefixes Served: (423) 326, 344 Notes: Photo 2 from March 2006. Current photo source: GSV.
Chattanooga (Hixson) "Middle Valley" Photo 2 | Photo 3	Listing Updated: July 2021 Operating Company: at&t/BellSouth/South Central Bell CLLI: CHTGTNMVDS0 Switch Type: Nokia/Alcatel/Lucent 5ESS Prefixes Served: (423) 842-3, 847 Notes: Photos 2 and 3 from March 2006. Current photo source: GSV.
Chattanooga "Ninth Street" Photo 2 | Photo 3 | Photo 4 Photo 5 | Photo 6 | Photo 7	Listing Updated: July 2021 Operating Company: at&t/BellSouth/South Central Bell CLLI: CHTGTNNSDS0 CHTGTNNSDS1 Switch Type: DS0: Ribbon/Genband/Nortel DMS-100 DS1: Nokia/Alcatel/Lucent 5ESS Prefixes Served: DS0: (423) 634 DS1: (423) (423) 209, 265-7, 321, 386, 425, 642, 668, 751-2, 755-7, 763, 778, 785 (706) 630 Notes: MLK Blvd. was originally Ninth Street, hence the name of the central office. Photo 2 from July 2008. Photos 5-7 are from the original photo set in March 2006 when this was still a BellSouth office. Current photo source: GSV
Chattanooga "Red Bank" Photo 2 | Photo 3 Photo 4 | Photo 5	Listing Updated: July 2021 Operating Company: at&t/BellSouth/South Central Bell CLLI: CHTGTNRBDS0 Switch Type: Nokia/Alcatel/Lucent 5ESS Prefixes Served: (423) 870, 874-7 Notes: Photos 2-5 from March 2006. Current photo source: GSV
Chattanooga "Saint Elmo" Photo 2	Listing Updated: July 2021 Operating Company: at&t/BellSouth/South Central Bell CLLI: CHTGTNSEDS0 Switch Type: Nokia/Alcatel/Lucent 5ESS Prefixes Served: (423) 821, 822, 825 (706) 820 Notes: Photo 2 from March 2006. Current photo source: GSV
Chattanooga "Signal Mountain" Photo 2	Listing Updated: July 2021 Operating Company: at&t/BellSouth/South Central Bell CLLI: CHTGTNSMRS0 (Telcordia) CHTGTNSMRS5 (NANPA) Switch Type: Nokia/Alcatel/Lucent 5ESS Remote Prefixes Served: (423) 517, 883, 886 Notes: Photo 2 from March 2006. Current photo source: GSV.
Church Hill Photo 2	Listing Updated: July 2021 Operating Company: Brightspeed/Centurylink/Embarq/Sprint/United Telephone CLLI: CHHLTNXARS0 Switch Type: Ribbon/Genband/Nortel RSC Prefixes Served: (423) 256, 357 Notes: Photo 2 from Larry P. (June 2014). Current photo source: GSV
Cleveland Photo 2 | Photo 3	Listing Updated: July 2021 Operating Company: at&t/BellSouth/South Central Bell CLLI: CLEVTNMADS0 Switch Type: Nokia/Alcatel/Lucent 5ESS Prefixes Served: (423) 339, 472-3, 476, 478-9, 559, 614, 728, 961 Notes: Also serves the Georgetown ratecenter. Photo 2-3 source: Larry P. (August 2015). Current photo source: GSV
Elizabethton Photo 2	Listing Updated: July 2021 Operating Company: Brightspeed/Centurylink/Embarq/Sprint/United Telephone CLLI: ELTNTNXADS0 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (423) 542-3, 547 Notes: Photo 2 source: Larry P. (July 2015). Current photo source: GSV
Englewood	Listing Updated: September 2016 Operatng Company: TDS Telecom/Tellico Telephone CLLI: ENWDTNXADS1 Switch Type: Digital Switch (unknown type) Prefixes Served: (423) 885, 887 Notes: Source: Larry P.
Etowah	Listing Updated: September 2016 Operating Company: at&t/BellSouth/South Central Bell CLLI: ETWHTNMTRS0 Switch Type: Nokia/Alcatel/Lucent 5ESS Remote Prefixes Served: (423) 263 Notes: Source: Larry P.
Greeneville Photo 2 | Photo 3	Listing Updated: July 2021 Operating Company: Brightspeed/Centurylink/Embarq/Sprint/United Telephone CLLI: GRVLTNXADS0 Switch Type: Nokia/Alcatel/Lucent 5ESS Prefixes Served: (423) 359, 636, 638-9, 783, 787, 798 Notes: Photo 2 source: Larry P. (July 2014). Current photo source: GSV
Hampton	Listing Updated: July 2015 Operating Company: Brightspeed/Centurylink/Embarq/Sprint/United Telephone CLLI: HMPNTNXARS0 Switch Type: Ribbon/Genband/Nortel RSC Prefixes Served: (423) 725, 896 Notes: Source: Larry P.
Johnson City "Main"	Listing Updated: January 2013 Operating Company: Brightspeed/Centurylink/Embarq/Sprint/United Telephone CLLI: (was JHCYTNXADS0) Switch Type: (was Ribbon/Genband/Nortel DMS-100) Prefixes Served: None Notes: This CO is no longer in use and the prefixes served out of it are now served out of Johnson City "North" (see below). Source: Jason B.
Johnson City "North" Photo 2	Listing Updated: July 2021 Operating Company: Brightspeed/Centurylink/Embarq/Sprint/United Telephone CLLI: JHCYTNXCPS0 Switch Type: Packet Switch (unknown type) Prefixes Served: (423) 232, 262, 282-3, 410, 431, 433-4, 439, 461, 610, 854, 915, 926, 928-9, 938, 952-3, 975, 979 Notes: Photo 2 source:Jason B. (January 2013). Current photo source: GSV
Kingsport "XA" Photo 2 | Photo 3 Photo 4	Listing Updated: July 2021 Operating Company: Brightspeed/Centurylink/Embarq/Sprint/United Telephone CLLI: KGPTTNXADS0 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (276) 225 (423) 224, 229-30, 245-7, 378, 390, 392, 578, 857 Notes: Also serves Morrison City, VA. Photos 3-4 source: Larry P. (June 2014). Current photo source: GSV
Kingsport "XC" Photo 2	Listing Updated: July 2021 Operating Company: Brightspeed/Centurylink/Embarq/Sprint/United Telephone CLLI: KGPTTNXCRS0 Switch Type: Ribbon/Genband/Nortel RSC Prefixes Served: (423) 288, 343 Notes: Photo 2 source: Larry P. (July 2015). Current photo source: GSV
La Folette Photo 2	Listing Updated: July 2021 Operating Company: at&t/BellSouth/South Central Bell CLLI: LFLTTNMADS0 Switch Type: Nokia/Alcatel/Lucent 5ESS Prefixes Served: (423) 562-3, 566, 907 Notes: Photo 2 source: Larry P. (July 2015). Current photo source: GSV
Limestone Photo 2	Listing Updated: July 2021 Operating Company: Brightspeed/Centurylink/Embarq/Sprint/United Telephone CLLI: LMSTTNXADS0 Switch Type: Ribbon/Genband/Nortel DMS-10 Prefixes Served: (423) 257 Notes: Photo 2 source: Larry P. (June 2014). Current photo source: GSV
Madisonville	Listing Updated: September 2012 Operating Company: at&t/BellSouth/South Central Bell CLLI: MDVITNMTDS0 Switch Type: Nokia/Alcatel/Lucent 5ESS Prefixes Served: (423) 420, 442 Notes: Source: Larry P.
Midway (Sullivan) Photo 2	Listing Updated: July 2021 Operating Company: Brightspeed/Centurylink/Embarq/Sprint/United Telephone CLLI: MDWYTNXARS0 Switch Type: Ribbon/Genband/Nortel RSC Prefixes Served: (423) 239 Notes: Photo 2 source: Larry P. (July 2015). Current photo source: GSV
Morristown	Listing Updated: June 2014 Operating Company: at&t/BellSouth/South Central Bell CLLI: MRTWTNMADS0 Switch Type: Nokia/Alcatel/Lucent 5ESS Prefixes Served: (423) 317-8, 492, 522, 581, 585-7 (865) 993 Notes: Also serves Bean Station. Source: Larry P.
Mosheim Photo 2	Listing Updated: July 2021 Operating Company: Brightspeed/Centurylink/Embarq/Sprint/United Telephone CLLI: MOSHTNXARS0 Switch Type: Nokia/Alcatel/Lucent 5ESS Remote Prefixes Served: (423) 422 Notes: Photo 2 source: Larry P. (June 2014). Current photo source: GSV
Newport	Listing Updated: July 2015 Operating Company: at&t/BellSouth/South Central Bell CLLI: NWPTTNMTDS0 Switch Type: Nokia/Alcatel/Lucent 5ESS Prefixes Served: (423) 613, 623, 625 (865) 509 Notes: Also serves Chestnut Hill. Source: Larry P.
Niota	Listing Updated: August 2015 Operating Company: TDS/Tellico Telephone Company CLLI: NIOTTNXARS0 Switch Type: Nokia/Siemens/Stromberg Carlson DCO DCL Prefixes Served: (423) 568 Notes: Source: Larry P.
Ooltewah Photo 2 | Photo 3 Photo 4 | Photo 5	Listing Updated: July 2021 Operating Company: Brightspeed/Centurylink/CenturyTel/Ooltewah-Collegedale Telephone CLLI: OLTWTNXADS1 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (423) 238 Notes: Originally a small independent (Ooltewah-Collegedale Telephone), was bought by CenturyTel and is now Brightspeed/Centurylink. Photos 2-5 are from July 2008. Current photo source: GSV. Photo 2 shows customer service office on left, switch building on right. Photo 3 is close-up of customer service office, Photo 4 is close-up of switch building, and Photo 5 is an old Charge-A-Call phone for people to order service or report an outage.
Rogersville	Listing Updated: September 2012 Operating Company: at&t/BellSouth/South Central Bell CLLI: RRVLTNMADS0 Switch Type: Nokia/Siemens/Stromberg Carlson DCO Prefixes Served: (423) 272, 921 Notes: Source: Larry P.
Sullivan Gardens Photo 2	Listing Updated: July 2021 Operating Company: Brightspeed/Centurylink/Embarq/Sprint/United Telephone CLLI: SLGRTNXARS0 Switch Type: Ribbon/Genband/Nortel RLC Prefixes Served: (423) 349, 516 Notes: Photo 2 source: Larry P. (July 2015). Current photo source: GSV
Surgoinsville	Listing Updated: June 2014 Operating Company: at&t/BellSouth/South Central Bell CLLI: SRVLTNMADS0 Switch Type: Nokia/Siemens/Stromberg Carlson DCO Remote Network Switch Prefixes Served: (423) 345 Notes: Source: Larry P.
Sweetwater	Listing Updated: August 2015 Operating Company: at&t/BellSouth/South Central Bell CLLI: SWTWTNMTRS0 Switch Type: Nokia/Alcatel/Lucent 5ESS Remote Prefixes Served: (423) 337, 351 (865) 213 Notes: Also serves the West Sweetwater ratecenter. Source: Larry P.
Vonore	Listing Updated: September 2016 Operating Company: TDS Telecom/Tellico Telephone CLLI: VONRTNXADS1 Switch Type: Digital Switch (unknown type0 Prefixes Served: (423) 792, 884 Notes: Source: Larry P.