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 |
|---|---|---|---|---|---|---|---|
| 2021-04-22 | 423-672-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | JOHNSON CY | TN |
| 2021-04-22 | 423-672-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | JOHNSON CY | TN |
| 2021-04-22 | 423-674-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | DAYTON | TN |
| 2021-04-22 | 423-674-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | DAYTON | TN |
| 2021-04-22 | 423-678-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | ROAN MT | TN |
| 2021-04-22 | 423-686-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | FORK RIDGE | TN |
| 2021-04-22 | 423-686-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | FORK RIDGE | TN |
| 2021-04-22 | 423-686-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | FORK RIDGE | TN |
| 2021-04-22 | 423-686-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | FORK RIDGE | TN |
| 2021-04-22 | 423-840-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | BUTLER | TN |
| 2021-04-22 | 423-840-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | BUTLER | TN |
| 2021-04-22 | 423-934-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | SURGOINSVL | TN |
| 2021-04-22 | 423-934-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | SURGOINSVL | TN |
| 2021-04-20 | 423-934-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | SURGOINSVL | TN |
| 2021-04-19 | 423-549-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-04-19 | 423-656-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-04-19 | 423-656-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-04-19 | 423-656-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-04-19 | 423-656-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-04-19 | 423-656-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-04-19 | 423-670-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-04-19 | 423-670-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-04-19 | 423-670-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-04-19 | 423-670-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-04-19 | 423-672-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-04-19 | 423-672-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-04-15 | 423-678-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | ROAN MT | TN |
| 2021-04-13 | 423-376-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | MADISONVL | TN |
| 2021-04-13 | 423-419-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | CUMBERLDGP | TN |
| 2021-04-13 | 423-466-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | ATHENS | TN |
| 2021-04-13 | 423-577-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | ONEIDA | TN |
| 2021-04-13 | 423-621-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | MORRISTOWN | TN |
| 2021-04-13 | 423-673-4XXX | 4000–4999 | Assigned | PAETEC ITEL, LLC | 829J | JOHNSON CY | TN |
| 2021-04-13 | 423-734-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | ROGERSVL | TN |
| 2021-04-13 | 423-814-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | SWEETWATER | TN |
| 2021-04-13 | 423-904-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2021-04-13 | 423-905-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JOHNSON CY | TN |
| 2021-04-09 | 423-459-1XXX | 1000–1999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | CHATTNOOGA | TN |
| 2021-04-05 | 423-560-9XXX | 9000–9999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | ERWIN | TN |
| 2021-04-01 | 423-880-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | JOHNSON CY | TN |
| 2021-04-01 | 423-980-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | CHATTNOOGA | TN |
| 2021-03-19 | 423-934-6XXX | 6000–6999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | SURGOINSVL | TN |
| 2021-03-15 | 423-549-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | JOHNSON CY | TN |
| 2021-03-15 | 423-549-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | JOHNSON CY | TN |
| 2021-03-12 | 423-264-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | VONORE | TN |
| 2021-03-12 | 423-264-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | VONORE | TN |
| 2021-03-12 | 423-380-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | CLEVELAND | TN |
| 2021-03-12 | 423-380-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | CLEVELAND | TN |
| 2021-03-12 | 423-703-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | COKERCREEK | TN |
| 2021-03-12 | 423-703-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | COKERCREEK | 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.