Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 423 [Rate centres in NPA 423] [Dial plan for NPA 423]

Block: A

1 2 3 4 5 6 7 8 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-200 A Morristown TN KNVLTNMANMD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 474      
423-201 A La Follette TN KNVLTNMANMD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 474      
423-202 A Johnson City TN JHCYTNXCX3X  7278 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN 956      
423-203 A Chattanooga TN CHTGTN1212Z  490J DISH WIRELESS, LLC 472      
423-205 A Etowah TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2024-01-15   
423-206 A Chattanooga TN CHTGTNNSXOZ  156J RCLEC, INC. 472      
423-207 A Midway (Washington) TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-208 A Chattanooga TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-209 A Chattanooga TN CHTGTNNSDS1  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-210 A Tellico Plains TN KNVLTNMA31Z  6278 UNITED STATES CELLULAR - TN 474      
423-212 A Blountville TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-213 A Elizabethton TN JHCYTNXCX2Y  8645 SUNCOM DBA T-MOBILE USA 956      
423-214 A Englewood TN KNVLTNMA31Z  6278 UNITED STATES CELLULAR - TN 474      
423-215 A Oneida TN KNVLTNIIAMD  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 474      
423-216 A Benton TN CHTGTNNS04Z  829J PAETEC ITEL, LLC 472   2024-12-05   
423-217 A Bristol TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-218 A Johnson City TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-219 A Charleston TN CHTGTNNSXEY  114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 472      
423-220 A Erwin TN JHCYTNXCYZZ  829J PAETEC ITEL, LLC 956   2024-12-07   
423-221 A Chattanooga TN CHTGTNMAXTX  6630 USA MOBILITY WIRELESS, INC. 472      
423-222 A Pikeville TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-223 A Oneida TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474      
423-224 A Kingsport TN KGPTTNXADS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-225 A Benton TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472      
423-226 A Church Hill TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956      
423-227 A Chattanooga TN CHTGTNNSXCZ  7473 POWERTEL ATLANTA LICENSES, INC. 472      
423-228 A South Pittsburg TN CHTGTNNS04Z  829J PAETEC ITEL, LLC 472   2024-12-05   
423-229 A Kingsport TN KGPTTNXADS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-230 A Kingsport TN KGPTTNXADS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-231 A Morristown TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474      
423-232 A Johnson City TN JHCYTNXCPS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-233 A Johnson City TN JHCYTNXCPS0  6880 PRO PAGE PARTNERS, LLC 956      
423-234 A Baileyton TN BLTNTNXARS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-235 A Bulls Gap TN BLGPTNMARS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-236 A Apison TN APSNTNXARS5  0574 BRIGHTSPEED OF SOUTHERN TENNESSEE, LC 472      
423-237 A Newport TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474      
423-238 A Ooltewah TN OLTWTNXADS1  0574 BRIGHTSPEED OF SOUTHERN TENNESSEE, LC 472      
423-239 A Midway (Sullivan) TN MDWYTNXARS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-240 A Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472      
423-241 A Copper Basin TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472      
423-242 A Chattanooga TN CHTGTNKVDS0  114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 472      
423-243 A Soddy Daisy TN CHTGTNKVDS0  114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 472      
423-244 A Cleveland TN CHTGTNKVDS0  114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 472      
423-245 A Kingsport TN KGPTTNXADS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-246 A Kingsport TN KGPTTNXADS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-247 A Kingsport TN KGPTTNXADS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-248 A Newport TN KNVLTNMA31Z  6278 UNITED STATES CELLULAR - TN 474      
423-249 A Fork Ridge TN MDBOKYMADS1  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 466      
423-250 A Cleveland TN CHTGTNNSXGZ  204G TWIN LAKES COMMUNICATIONS, INC. - TN 472      
423-251 A Kingsport TN JHCYTNXCX2Y  5562 METROPCS, INC. 956      
423-252 A Athens TN KNVLTNMAYAY  829J PAETEC ITEL, LLC 474   2024-12-05   
423-253 A Tellico Plains TN TLPLTNXAPS0  0578 TELLICO TEL. CO., INC. 474      
423-254 A Morristown TN KNVLTNMAYAY  829J PAETEC ITEL, LLC 474   2024-12-05   
423-255 A Chattanooga TN CHTGTNNSXCZ  7473 POWERTEL ATLANTA LICENSES, INC. 472      
423-256 A Church Hill TN CHHLTNXARS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-257 A Limestone TN LMSTTNXADS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-258 A Morristown TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474      
423-259 A New Tazewell TN KNVLTNMA31Z  6278 UNITED STATES CELLULAR - TN 474      
423-260 A Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472      
423-261 A Coker Creek TN CKCKTNXARP0  0578 TELLICO TEL. CO., INC. 474      
423-262 A Johnson City TN JHCYTNXCPS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-263 A Etowah TN ETWHTNMTRS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-264 A Vonore TN KNVLTNMAYHX  318J COMCAST IP PHONE, LLC 474      
423-265 A Chattanooga TN CHTGTNNSDS1  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-266 A Chattanooga TN CHTGTNNSDS1  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-267 A Chattanooga TN CHTGTNNSDS1  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-268 A Johnson City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956      
423-269 A Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472      
423-270 A Erwin TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956      
423-271 A Sweetwater TN KNVLTNIIAMD  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 474      
423-272 A Rogersville TN RRVLTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-273 A Morristown TN KNVLTNMA96Z  7476 POWERTEL NASHVILLE LICENSES, INC. 474      
423-274 A Bristol TN BRSTTNXADS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-275 A Chattanooga TN CHTGTNNS04Z  829J PAETEC ITEL, LLC 472   2024-12-05   
423-276 A Kingsport TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956      
423-277 A Morristown TN KNVLTNMA96Z  7476 POWERTEL NASHVILLE LICENSES, INC. 474      
423-278 A Greeneville TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-279 A Blountville TN BUVLTNXARS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-280 A Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472      
423-281 A Butler TN BUVLTNAX0MD  792K CHARTER IP ENABLED SERVICES, LLC 956      
423-282 A Johnson City TN JHCYTNXCPS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-283 A Johnson City TN JHCYTNXCPS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-284 A Cleveland TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-285 A Dayton TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-286 A Oneida TN ONEDTNXADS1  0565 HIGHLAND TEL. COOP, INC. 474      
423-287 A Chattanooga TN CHTGTNNSDS1  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-288 A Kingsport TN KGPTTNXCRS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-289 A Morristown TN KNVLTNMA96Z  7476 POWERTEL NASHVILLE LICENSES, INC. 474      
423-290 A Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472      
423-291 A Mountain City TN JHCYTNXCX2Y  8645 SUNCOM DBA T-MOBILE USA 956      
423-292 A Fall Branch TN JHCYTNXCX2Y  8645 SUNCOM DBA T-MOBILE USA 956      
423-293 A Rogersville TN KNVLTNMA96Z  7476 POWERTEL NASHVILLE LICENSES, INC. 474      
423-294 A Chattanooga TN CHTGTNNSX8X  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-295 A Ball Play TN BLPLTNXARP0  0578 TELLICO TEL. CO., INC. 474      
423-296 A Chattanooga TN CHTGTNBRDS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-297 A Elizabethton TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-298 A Chattanooga TN CHTGTNMATMD  7421 AT&T - LOCAL 472      
423-299 A Benton TN CHTGTNNSX8X  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-300 A Sneedville TN KNVLTNIIAMD  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 474      
423-301 A South Pittsburg TN CHTGTN12X8X  7278 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN 472      

1 2 3 4 5 6 7 8 >>

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.