NumberResearchRecent thousands-block assignments
13 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, last 30 days — NPA 423
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2021-11-19 | 423-848-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-11-19 | 423-848-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-11-19 | 423-848-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-11-19 | 423-848-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-11-19 | 423-848-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-11-12 | 423-873-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | STONEY CRK | TN |
| 2021-11-09 | 423-219-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | CHARLESTON | TN |
| 2021-11-09 | 423-393-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BULLS GAP | TN |
| 2021-11-09 | 423-545-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | MADISONVL | TN |
| 2021-11-09 | 423-604-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | ETOWAH | TN |
| 2021-11-09 | 423-675-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | JASPER | TN |
| 2021-11-09 | 423-922-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BAILEYTON | TN |
| 2021-11-03 | 423-219-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | CHARLESTON | TN |
| 2021-11-03 | 423-597-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | BENTON | TN |
| 2021-11-02 | 423-437-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | LAFOLLETTE | TN |
| 2021-10-29 | 423-279-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BLOUNTVL | TN |
| 2021-10-29 | 423-325-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BLOUNTVL | TN |
| 2021-10-29 | 423-689-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BRISTOL | TN |
| 2021-10-29 | 423-689-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BRISTOL | TN |
| 2021-10-29 | 423-759-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | MORRISTOWN | TN |
| 2021-10-29 | 423-759-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | MORRISTOWN | TN |
| 2021-10-20 | 423-696-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | ROGERSVL | TN |
| 2021-10-19 | 423-934-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | SURGOINSVL | TN |
| 2021-10-19 | 423-934-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | SURGOINSVL | TN |
| 2021-10-13 | 423-558-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2021-10-13 | 423-558-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2021-10-13 | 423-654-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2021-10-13 | 423-654-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2021-10-13 | 423-654-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2021-09-27 | 423-264-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | VONORE | TN |
| 2021-09-27 | 423-373-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | BULLS GAP | TN |
| 2021-09-27 | 423-456-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | LAFOLLETTE | TN |
| 2021-09-27 | 423-545-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | MADISONVL | TN |
| 2021-09-27 | 423-545-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | MADISONVL | TN |
| 2021-09-27 | 423-572-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | ENGLEWOOD | TN |
| 2021-09-27 | 423-691-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | ATHENS | TN |
| 2021-09-27 | 423-691-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | ATHENS | TN |
| 2021-09-27 | 423-759-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | MORRISTOWN | TN |
| 2021-09-27 | 423-808-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | TELLICO PL | TN |
| 2021-09-27 | 423-818-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | JELLICO | TN |
| 2021-09-27 | 423-871-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | LAFOLLETTE | TN |
| 2021-09-27 | 423-871-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | LAFOLLETTE | TN |
| 2021-09-27 | 423-934-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | SURGOINSVL | TN |
| 2021-09-24 | 423-269-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | CHATTNOOGA | TN |
| 2021-09-24 | 423-407-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | SPRINGCITY | TN |
| 2021-09-24 | 423-501-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | MOUNTAINCY | TN |
| 2021-09-24 | 423-597-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | BENTON | TN |
| 2021-09-24 | 423-600-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | APISON | TN |
| 2021-09-24 | 423-662-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | BLOUNTVL | TN |
| 2021-09-24 | 423-673-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | JOHNSON CY | TN |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.