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 |
|---|---|---|---|---|---|---|---|
| 2021-06-10 | 423-583-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | SULIVNGDNS | TN |
| 2021-06-10 | 423-657-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | MOSHEIM | TN |
| 2021-06-10 | 423-666-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | ELIZABTHTN | TN |
| 2021-06-10 | 423-678-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | ROAN MT | TN |
| 2021-06-10 | 423-678-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | ROAN MT | TN |
| 2021-06-10 | 423-712-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | BLUFF CITY | TN |
| 2021-06-10 | 423-766-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | LIMESTONE | TN |
| 2021-06-10 | 423-766-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | LIMESTONE | TN |
| 2021-06-10 | 423-820-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | GREENEVL | TN |
| 2021-06-10 | 423-820-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | GREENEVL | TN |
| 2021-06-10 | 423-830-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | KINGSPORT | TN |
| 2021-06-10 | 423-830-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | KINGSPORT | TN |
| 2021-06-10 | 423-922-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | BAILEYTON | TN |
| 2021-06-10 | 423-922-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | BAILEYTON | TN |
| 2021-06-09 | 423-722-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-06-09 | 423-722-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-06-09 | 423-791-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-06-09 | 423-791-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-06-09 | 423-880-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-06-09 | 423-880-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-06-09 | 423-880-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-06-09 | 423-880-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-06-09 | 423-880-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-06-09 | 423-880-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-06-09 | 423-880-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-06-09 | 423-880-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2021-06-07 | 423-966-5XXX | 5000–5999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | BALL PLAY | TN |
| 2021-06-03 | 423-501-4XXX | 4000–4999 | Assigned | VONAGE AMERICA LLC | 197D | MOUNTAINCY | TN |
| 2021-06-02 | 423-734-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | ROGERSVL | TN |
| 2021-06-02 | 423-734-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | ROGERSVL | TN |
| 2021-06-02 | 423-734-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | ROGERSVL | TN |
| 2021-05-26 | 423-640-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | SNEEDVILLE | TN |
| 2021-05-21 | 423-818-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | JELLICO | TN |
| 2021-05-19 | 423-466-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | ATHENS | TN |
| 2021-05-18 | 423-688-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | SNEEDVILLE | TN |
| 2021-05-13 | 423-687-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2021-05-13 | 423-687-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2021-05-13 | 423-687-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2021-05-13 | 423-687-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2021-05-13 | 423-687-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2021-05-13 | 423-687-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2021-05-13 | 423-687-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2021-05-13 | 423-687-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2021-05-13 | 423-687-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2021-05-13 | 423-687-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2021-05-03 | 423-770-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | CHURCHHILL | TN |
| 2021-04-22 | 423-396-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | COLLEGEDL | TN |
| 2021-04-22 | 423-396-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | COLLEGEDL | TN |
| 2021-04-22 | 423-568-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | NIOTA | TN |
| 2021-04-22 | 423-600-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | APISON | 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.