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 |
|---|---|---|---|---|---|---|---|
| 2022-10-17 | 423-860-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2022-10-11 | 423-806-7XXX | 7000–7999 | Assigned | COMMIO, LLC | 939H | MIDWAY | TN |
| 2022-10-10 | 423-998-6XXX | 6000–6999 | Assigned | COMMIO, LLC | 939H | JELLICO | TN |
| 2022-10-10 | 423-998-7XXX | 7000–7999 | Assigned | COMMIO, LLC | 939H | JELLICO | TN |
| 2022-10-10 | 423-998-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | JELLICO | TN |
| 2022-10-10 | 423-998-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | JELLICO | TN |
| 2022-09-28 | 423-532-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | NEWPORT | TN |
| 2022-09-27 | 423-769-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | BENTON | TN |
| 2022-09-26 | 423-705-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | JOHNSON CY | TN |
| 2022-09-26 | 423-705-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | JOHNSON CY | TN |
| 2022-09-26 | 423-707-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | ELIZABTHTN | TN |
| 2022-09-26 | 423-812-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | GREENEVL | TN |
| 2022-09-26 | 423-817-6XXX | 6000–6999 | Assigned | COMMIO, LLC | 939H | KINGSPORT | TN |
| 2022-09-15 | 423-601-1XXX | 1000–1999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | BULLS GAP | TN |
| 2022-09-07 | 423-460-2XXX | 2000–2999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | MOUNTAINCY | TN |
| 2022-08-30 | 423-220-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | ERWIN | TN |
| 2022-08-30 | 423-325-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | BLOUNTVL | TN |
| 2022-08-30 | 423-373-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | BULLS GAP | TN |
| 2022-08-30 | 423-419-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | CUMBERLDGP | TN |
| 2022-08-30 | 423-451-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | SODDYDAISY | TN |
| 2022-08-30 | 423-471-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | MOUNTAINCY | TN |
| 2022-08-30 | 423-501-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | MOUNTAINCY | TN |
| 2022-08-30 | 423-518-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | ELIZABTHTN | TN |
| 2022-08-30 | 423-518-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | ELIZABTHTN | TN |
| 2022-08-30 | 423-545-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | MADISONVL | TN |
| 2022-08-30 | 423-545-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | MADISONVL | TN |
| 2022-08-30 | 423-560-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | ERWIN | TN |
| 2022-08-30 | 423-644-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | SODDYDAISY | TN |
| 2022-08-30 | 423-662-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | BLOUNTVL | TN |
| 2022-08-30 | 423-671-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | CHATTNOOGA | TN |
| 2022-08-30 | 423-674-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | DAYTON | TN |
| 2022-08-30 | 423-674-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | DAYTON | TN |
| 2022-08-30 | 423-712-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | BLUFF CITY | TN |
| 2022-08-30 | 423-740-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | CLEVELAND | TN |
| 2022-08-30 | 423-740-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | CLEVELAND | TN |
| 2022-08-30 | 423-740-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | CLEVELAND | TN |
| 2022-08-30 | 423-769-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | BENTON | TN |
| 2022-08-30 | 423-769-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | BENTON | TN |
| 2022-08-30 | 423-853-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | JOHNSON CY | TN |
| 2022-08-30 | 423-853-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | JOHNSON CY | TN |
| 2022-08-30 | 423-927-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | MORRISTOWN | TN |
| 2022-08-30 | 423-927-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | MORRISTOWN | TN |
| 2022-08-30 | 423-927-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | MORRISTOWN | TN |
| 2022-08-17 | 423-275-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2022-08-17 | 423-275-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2022-08-17 | 423-275-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2022-08-17 | 423-498-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2022-08-09 | 423-219-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | CHARLESTON | TN |
| 2022-07-27 | 423-446-0XXX | 0000–0999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | FALLBRANCH | TN |
| 2022-07-27 | 423-897-5XXX | 5000–5999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | FALLBRANCH | 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.