KINGSPORT prefixes in area code 423
NANPA records 32 assigned NXX blocks to rate center KINGSPORT in area code 423, 4.2% of the 764 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 12 holders hold those blocks, the largest being UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN (13), METROPCS, INC. (5), NEW CINGULAR WIRELESS PCS, LLC - GA (3). The earliest assignment on record here is 2001-03-09 and the most recent 2026-04-23. 22 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 423-224 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-229 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-230 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-245 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-246 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-247 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-251 | T-Mobile METROPCS, INC. | 2017-01-05 | yes | yes |
| 423-276 | AT&T NEW CINGULAR WIRELESS PCS, LLC - GA | – | yes | yes |
| 423-288 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-343 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | yes | yes |
| 423-367 | AT&T NEW CINGULAR WIRELESS PCS, LLC - GA | – | yes | yes |
| 423-378 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-390 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | 2002-08-13 | yes | yes |
| 423-392 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-398 | T-Mobile SUNCOM DBA T-MOBILE USA | 2011-03-01 | yes | yes |
| 423-408 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 2009-10-29 | yes | yes |
| 423-429 | AT&T NEW CINGULAR WIRELESS PCS, LLC - GA | 2008-01-21 | yes | yes |
| 423-480 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 2012-02-10 | yes | yes |
| 423-530 | T-Mobile METROPCS, INC. | 2012-03-15 | yes | yes |
| 423-578 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | yes | yes |
| 423-579 | MOUNTAINET TELEPHONE COMPANY - VA | 2009-02-13 | yes | yes |
| 423-684 | Bandwidth BANDWIDTH.COM CLEC, LLC - TN | 2026-04-23 | yes | yes |
| 423-723 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TN | – | yes | yes |
| 423-732 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 2015-08-11 | yes | yes |
| 423-765 | Charter CHARTER IP ENABLED SERVICES, LLC | 2004-12-02 | yes | yes |
| 423-782 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 423-817 | T-Mobile METROPCS, INC. | – | yes | yes |
| 423-830 | Onvoy ONVOY, LLC - TN | 2018-05-17 | yes | yes |
| 423-857 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-863 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | – | yes | yes |
| 423-963 | T-Mobile METROPCS, INC. | 2001-03-09 | yes | yes |
| 423-967 | T-Mobile METROPCS, INC. | – | yes | yes |
The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.
Who holds the blocks
| Holder | Brand | Blocks | Share here |
|---|---|---|---|
| UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | Lumen | 13 | 40.6% |
| METROPCS, INC. | T-Mobile | 5 | 15.6% |
| NEW CINGULAR WIRELESS PCS, LLC - GA | AT&T | 3 | 9.4% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | Verizon | 3 | 9.4% |
| SUNCOM DBA T-MOBILE USA | T-Mobile | 1 | 3.1% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - TN | AT&T | 1 | 3.1% |
| MOUNTAINET TELEPHONE COMPANY - VA | – | 1 | 3.1% |
| BANDWIDTH.COM CLEC, LLC - TN | Bandwidth | 1 | 3.1% |
| LEVEL 3 COMMUNICATIONS, LLC - TN | Lumen | 1 | 3.1% |
| CHARTER IP ENABLED SERVICES, LLC | Charter | 1 | 3.1% |
| PAETEC ITEL, LLC | Windstream | 1 | 3.1% |
| ONVOY, LLC - TN | Onvoy | 1 | 3.1% |
Frequently asked
Which prefixes belong to KINGSPORT in area code 423?
32 blocks: 224, 229, 230, 245, 246, 247, 251, 276, 288, 343, 367, 378 and 20 more, all listed in the table above.
Which carriers have numbers in KINGSPORT?
UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN (13 blocks), METROPCS, INC. (5 blocks), NEW CINGULAR WIRELESS PCS, LLC - GA (3 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN (3 blocks), SUNCOM DBA T-MOBILE USA (1 block), TELEPORT COMMUNICATIONS AMERICA, LLC - TN (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is KINGSPORT a city?
It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.