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 |
|---|---|---|---|---|---|---|---|
| 2022-07-18 | 423-705-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JOHNSON CY | TN |
| 2022-07-18 | 423-705-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JOHNSON CY | TN |
| 2022-07-18 | 423-705-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JOHNSON CY | TN |
| 2022-07-18 | 423-705-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JOHNSON CY | TN |
| 2022-07-13 | 423-379-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | NEWPORT | TN |
| 2022-07-13 | 423-691-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | ATHENS | TN |
| 2022-07-13 | 423-925-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | LAFOLLETTE | TN |
| 2022-07-13 | 423-927-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | MORRISTOWN | TN |
| 2022-07-11 | 423-269-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2022-07-11 | 423-269-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2022-07-11 | 423-287-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2022-07-11 | 423-498-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2022-07-06 | 423-340-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2022-07-06 | 423-350-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2022-07-06 | 423-350-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2022-07-06 | 423-350-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2022-07-06 | 423-350-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2022-07-06 | 423-350-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2022-07-06 | 423-350-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2022-07-06 | 423-350-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2022-07-06 | 423-350-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2022-07-06 | 423-804-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2022-07-06 | 423-804-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2022-07-06 | 423-804-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2022-07-01 | 423-350-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | BRISTOL | TN |
| 2022-07-01 | 423-860-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | CHATTNOOGA | TN |
| 2022-06-30 | 423-275-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | CHATTNOOGA | TN |
| 2022-06-23 | 423-740-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CLEVELAND | TN |
| 2022-06-23 | 423-740-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CLEVELAND | TN |
| 2022-06-07 | 423-662-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | BLOUNTVL | TN |
| 2022-05-27 | 423-545-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | MADISONVL | TN |
| 2022-05-25 | 423-688-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | SNEEDVILLE | TN |
| 2022-05-19 | 423-633-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2022-05-19 | 423-904-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2022-05-11 | 423-719-9XXX | 9000–9999 | Assigned | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| 2022-05-11 | 423-750-1XXX | 1000–1999 | Assigned | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| 2022-05-11 | 423-750-2XXX | 2000–2999 | Assigned | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| 2022-05-11 | 423-750-3XXX | 3000–3999 | Assigned | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| 2022-05-10 | 423-770-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | CHURCHHILL | TN |
| 2022-04-21 | 423-222-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2022-04-21 | 423-222-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2022-04-21 | 423-222-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2022-04-21 | 423-222-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2022-04-21 | 423-222-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2022-04-21 | 423-222-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2022-04-21 | 423-222-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2022-04-21 | 423-222-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2022-04-21 | 423-222-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2022-04-21 | 423-222-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2022-04-21 | 423-540-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | NEWPORT | 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.