Local Calling Guide
Area code/prefix search
NPA: 423
[Rate centres in NPA 423]
[Dial plan for NPA 423]
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| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 423-979
| 3 |
Johnson City |
TN |
JHCYTNXCPS0 |
4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN |
956 |
|
|
|
| 423-979
| 4 |
Johnson City |
TN |
JHCYTNXCPS0 |
4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN |
956 |
|
|
|
| 423-979
| 5 |
Johnson City |
TN |
JHCYTNXCPS0 |
4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN |
956 |
|
|
|
| 423-979
| 6 |
Johnson City |
TN |
JHCYTNXCPS0 |
4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN |
956 |
|
|
|
| 423-979
| 7 |
Johnson City |
TN |
JHCYTNXCPS0 |
4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN |
956 |
|
|
|
| 423-979
| 8 |
Johnson City |
TN |
GTCYVA02AMD |
008A MOUNTAINET TELEPHONE COMPANY - TN |
956 |
|
2004-01-30 |
|
| 423-979
| 9 |
Johnson City |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
2021-09-05 |
|
| 423-980
| A |
Chattanooga |
TN |
CHTGTNNSXKY |
525E ONVOY, LLC - TN |
472 |
|
|
|
| 423-980
| 0 |
Chattanooga |
TN |
CHTGTNNSXKY |
525E ONVOY, LLC - TN |
472 |
|
2021-05-30 |
|
| 423-980
| 1 |
Chattanooga |
TN |
CHTGTN12X2Y |
939H COMMIO, LLC |
472 |
|
2024-02-08 |
|
| 423-980
| 2 |
Chattanooga |
TN |
CHTGTN12X2Y |
939H COMMIO, LLC |
472 |
|
2024-02-08 |
|
| 423-980
| 3 |
Chattanooga |
TN |
CHTGTN12X2Y |
939H COMMIO, LLC |
472 |
|
2024-02-08 |
|
| 423-980
| 4 |
Chattanooga |
TN |
CHTGTNNSXYZ |
478J NUSO, LLC |
472 |
|
2024-11-24 |
|
| 423-980
| 5 |
Chattanooga |
TN |
|
6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN |
472 |
|
2026-10-01 |
|
| 423-980
| 6 |
Chattanooga |
TN |
|
6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN |
472 |
|
2026-10-01 |
|
| 423-980
| 7 |
Chattanooga |
TN |
CHTGTNGZ4MD |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
472 |
|
2021-07-17 |
|
| 423-980
| 8 |
Chattanooga |
TN |
|
6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN |
472 |
|
2026-10-01 |
|
| 423-980
| 9 |
Chattanooga |
TN |
CHTGTNGZ4MD |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
472 |
|
2021-07-17 |
|
| 423-981
| A |
Johnson City |
TN |
JHCYTNXCX4Z |
700J WAVENATION, LLC |
956 |
|
2025-09-06 |
|
| 423-981
| 0 |
Johnson City |
TN |
JHCYTNXCX4Z |
700J WAVENATION, LLC |
956 |
|
2025-09-06 |
|
| 423-981
| 1 |
Johnson City |
TN |
JHCYTNXCXNX |
124F BANDWIDTH.COM CLEC, LLC - TN |
956 |
|
2026-06-06 |
|
| 423-981
| 8 |
Johnson City |
TN |
|
124F BANDWIDTH.COM CLEC, LLC - TN |
956 |
|
2026-09-13 |
|
| 423-987
| A |
Chattanooga |
TN |
CHTGTNGZ4MD |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
472 |
|
|
|
| 423-989
| A |
Bristol |
TN |
BRSTTNXADS0 |
4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN |
956 |
|
|
|
| 423-990
| A |
Bristol |
TN |
BRSTTNXADS0 |
4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN |
956 |
|
|
|
| 423-991
| A |
Chattanooga |
TN |
CHTGTNGZ4MD |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
472 |
|
|
|
| 423-992
| A |
Bristol |
TN |
BRSTTNXA9MD |
145J TERRA NOVA TELECOM INC. |
956 |
|
2025-10-09 |
|
| 423-992
| 0 |
Bristol |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
2026-04-25 |
|
| 423-992
| 1 |
Bristol |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
2026-04-25 |
|
| 423-992
| 2 |
Bristol |
TN |
|
145J TERRA NOVA TELECOM INC. |
956 |
|
2025-10-09 |
|
| 423-992
| 3 |
Bristol |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
2026-06-20 |
|
| 423-992
| 4 |
Bristol |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
2026-06-20 |
|
| 423-992
| 5 |
Bristol |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
2026-06-20 |
|
| 423-992
| 6 |
Bristol |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
2026-06-20 |
|
| 423-992
| 7 |
Bristol |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
2026-06-20 |
|
| 423-992
| 8 |
Bristol |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
2026-06-20 |
|
| 423-992
| 9 |
Bristol |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
2026-04-25 |
|
| 423-993
| A |
Chattanooga |
TN |
CHTGTNNS07Z |
321J HD CARRIER LLC |
472 |
|
2026-01-22 |
|
| 423-993
| 0 |
Chattanooga |
TN |
|
124F BANDWIDTH.COM CLEC, LLC - TN |
472 |
|
2026-08-08 |
|
| 423-993
| 1 |
Chattanooga |
TN |
|
124F BANDWIDTH.COM CLEC, LLC - TN |
472 |
|
2026-08-08 |
|
| 423-993
| 6 |
Chattanooga |
TN |
CHTGTNNS07Z |
321J HD CARRIER LLC |
472 |
|
2026-01-22 |
|
| 423-993
| 7 |
Chattanooga |
TN |
CHTGTNNS07Z |
321J HD CARRIER LLC |
472 |
|
2026-01-22 |
|
| 423-993
| 8 |
Chattanooga |
TN |
CHTGTNNS07Z |
321J HD CARRIER LLC |
472 |
|
2026-01-22 |
|
| 423-993
| 9 |
Chattanooga |
TN |
CHTGTNNS07Z |
321J HD CARRIER LLC |
472 |
|
2026-01-22 |
|
| 423-994
| A |
Chattanooga |
TN |
CHTGTNGZ4MD |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
472 |
|
|
|
| 423-994
| 0 |
Chattanooga |
TN |
CHTGTNGZ4MD |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
472 |
|
2007-07-01 |
|
| 423-994
| 1 |
Chattanooga |
TN |
CHTGTNNSXCZ |
7473 POWERTEL ATLANTA LICENSES, INC. |
472 |
|
2007-09-01 |
|
| 423-994
| 2 |
Chattanooga |
TN |
CHTGTN12X5Y |
6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN |
472 |
|
2009-02-05 |
|
| 423-994
| 3 |
Chattanooga |
TN |
CHTGTN12X5Y |
6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN |
472 |
|
2009-05-08 |
|
| 423-994
| 4 |
Chattanooga |
TN |
CHTGTN12X5Y |
6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN |
472 |
|
2009-05-08 |
|
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Last updated: Sat, 10 Oct 2026 15:24:20 UTC
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