JOHNSON CY prefixes in area code 423
NANPA records 67 assigned NXX blocks to rate center JOHNSON CY in area code 423, 8.8% 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. 29 holders hold those blocks, the largest being UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN (21), SUNCOM DBA T-MOBILE USA (7), NEW CINGULAR WIRELESS PCS, LLC - GA (6). The earliest assignment on record here is 2001-01-09 and the most recent 2025-11-26. 46 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area code 830 – overlay codes cover the same geography, so a rate center is served by all of them.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 423-202 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 2003-12-16 | yes | yes |
| 423-218 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TN | 2002-07-18 | yes | yes |
| 423-232 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-233 | PRO PAGE PARTNERS, LLC | – | no | yes |
| 423-262 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | yes | yes |
| 423-268 | AT&T NEW CINGULAR WIRELESS PCS, LLC - GA | 2012-06-08 | yes | yes |
| 423-282 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-283 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-302 | Bandwidth BANDWIDTH.COM CLEC, LLC - TN | 2008-11-10 | yes | yes |
| 423-328 | Comcast COMCAST IP PHONE, LLC | 2008-02-19 | yes | yes |
| 423-410 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-412 | Spok SPOK, INC. | – | no | yes |
| 423-427 | Onvoy ONVOY, LLC - TN | 2018-03-05 | yes | yes |
| 423-430 | NUSO, LLC | 2013-03-11 | yes | yes |
| 423-431 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | yes | yes |
| 423-433 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | yes | yes |
| 423-434 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-439 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | yes | yes |
| 423-461 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | yes | yes |
| 423-483 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 2002-06-07 | yes | yes |
| 423-491 | Lumen CENTURYLINK COMMUNICATIONS, LLC | 2013-06-21 | yes | yes |
| 423-524 | NUSO, LLC | 2018-02-06 | yes | yes |
| 423-549 | Vonage VONAGE AMERICA LLC | 2018-03-23 | yes | yes |
| 423-557 | T-Mobile SUNCOM DBA T-MOBILE USA | 2004-09-29 | yes | yes |
| 423-610 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-630 | TELESCAN, INC. - TN | 2007-09-25 | no | yes |
| 423-631 | Charter CHARTER IP ENABLED SERVICES, LLC | 2008-04-08 | yes | yes |
| 423-656 | CSC WIRELESS, LLC | 2020-07-22 | yes | yes |
| 423-670 | IP HORIZON LLC | 2020-09-23 | yes | yes |
| 423-672 | Telnyx TELNYX LLC | 2019-12-27 | yes | yes |
| 423-673 | Windstream PAETEC ITEL, LLC | 2021-04-13 | yes | yes |
| 423-676 | T-Mobile SUNCOM DBA T-MOBILE USA | – | yes | yes |
| 423-705 | NUSO, LLC | 2021-12-02 | yes | yes |
| 423-722 | Lumen LEVEL 3 COMMUNICATIONS, LLC - TN | – | yes | yes |
| 423-737 | AT&T NEW CINGULAR WIRELESS PCS, LLC - GA | – | no | yes |
| 423-741 | AT&T NEW CINGULAR WIRELESS PCS, LLC - GA | – | no | yes |
| 423-747 | AT&T NEW CINGULAR WIRELESS PCS, LLC - GA | – | no | yes |
| 423-767 | AT&T NEW CINGULAR WIRELESS PCS, LLC - GA | 2001-01-09 | yes | yes |
| 423-773 | T-Mobile SUNCOM DBA T-MOBILE USA | 2001-02-09 | no | yes |
| 423-791 | T-Mobile SUNCOM DBA T-MOBILE USA | – | yes | yes |
| 423-794 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 423-795 | Spok SPOK, INC. | – | no | yes |
| 423-796 | Dish BOOST SUBSCRIBERCO L.L.C. | 2022-02-01 | yes | yes |
| 423-833 | T-Mobile SUNCOM DBA T-MOBILE USA | – | yes | yes |
| 423-848 | SKYE TELECOM LLC DBA SKYETEL | 2021-09-03 | yes | yes |
| 423-849 | AT&T NEW CINGULAR WIRELESS PCS, LLC - GA | 2023-05-05 | yes | yes |
| 423-853 | Twilio TWILIO INTERNATIONAL, INC. | 2022-01-21 | yes | yes |
| 423-854 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-880 | Onvoy ONVOY, LLC - TN | 2021-03-31 | yes | yes |
| 423-900 | Onvoy ONVOY, LLC - TN | 2011-02-16 | yes | yes |
| 423-905 | Charter ONVOY SPECTRUM, LLC | 2021-04-13 | yes | yes |
| 423-906 | CALLWORKS CORPORATION | 2023-10-24 | yes | yes |
| 423-915 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | yes | yes |
| 423-924 | Peerless PEERLESS NETWORK OF TENNESSEE, LLC - TN | 2025-03-10 | yes | yes |
| 423-926 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-928 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-929 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-930 | MOUNTAINET TELEPHONE COMPANY - VA | 2009-02-13 | yes | yes |
| 423-938 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | 2002-08-13 | no | yes |
| 423-943 | T-Mobile SUNCOM DBA T-MOBILE USA | – | yes | yes |
| 423-946 | T-Mobile SUNCOM DBA T-MOBILE USA | 2001-03-09 | yes | yes |
| 423-952 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | yes | yes |
| 423-953 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-975 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | no | yes |
| 423-979 | Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN | – | yes | yes |
| 423-981 | WAVENATION, LLC | 2025-07-11 | yes | yes |
| 423-995 | HD CARRIER LLC | 2025-11-26 | 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 | 21 | 31.3% |
| SUNCOM DBA T-MOBILE USA | T-Mobile | 7 | 10.4% |
| NEW CINGULAR WIRELESS PCS, LLC - GA | AT&T | 6 | 9% |
| ONVOY, LLC - TN | Onvoy | 3 | 4.5% |
| NUSO, LLC | – | 3 | 4.5% |
| LEVEL 3 COMMUNICATIONS, LLC - TN | Lumen | 2 | 3% |
| SPOK, INC. | Spok | 2 | 3% |
| PAETEC ITEL, LLC | Windstream | 2 | 3% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | Verizon | 1 | 1.5% |
| PRO PAGE PARTNERS, LLC | – | 1 | 1.5% |
| BANDWIDTH.COM CLEC, LLC - TN | Bandwidth | 1 | 1.5% |
| COMCAST IP PHONE, LLC | Comcast | 1 | 1.5% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | Verizon | 1 | 1.5% |
| CENTURYLINK COMMUNICATIONS, LLC | Lumen | 1 | 1.5% |
| VONAGE AMERICA LLC | Vonage | 1 | 1.5% |
| TELESCAN, INC. - TN | – | 1 | 1.5% |
| CHARTER IP ENABLED SERVICES, LLC | Charter | 1 | 1.5% |
| CSC WIRELESS, LLC | – | 1 | 1.5% |
| IP HORIZON LLC | – | 1 | 1.5% |
| TELNYX LLC | Telnyx | 1 | 1.5% |
| BOOST SUBSCRIBERCO L.L.C. | Dish | 1 | 1.5% |
| SKYE TELECOM LLC DBA SKYETEL | – | 1 | 1.5% |
| TWILIO INTERNATIONAL, INC. | Twilio | 1 | 1.5% |
| ONVOY SPECTRUM, LLC | Charter | 1 | 1.5% |
| CALLWORKS CORPORATION | – | 1 | 1.5% |
| PEERLESS NETWORK OF TENNESSEE, LLC - TN | Peerless | 1 | 1.5% |
| MOUNTAINET TELEPHONE COMPANY - VA | – | 1 | 1.5% |
| WAVENATION, LLC | – | 1 | 1.5% |
| HD CARRIER LLC | – | 1 | 1.5% |
Same rate center in other codes
Overlay codes cover the same geography, so one rate center is served by all of them.
Frequently asked
Which prefixes belong to JOHNSON CY in area code 423?
67 blocks: 202, 218, 232, 233, 262, 268, 282, 283, 302, 328, 410, 412 and 55 more, all listed in the table above.
Which carriers have numbers in JOHNSON CY?
UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN (21 blocks), SUNCOM DBA T-MOBILE USA (7 blocks), NEW CINGULAR WIRELESS PCS, LLC - GA (6 blocks), ONVOY, LLC - TN (3 blocks), NUSO, LLC (3 blocks), LEVEL 3 COMMUNICATIONS, LLC - TN (2 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is JOHNSON CY 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.