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 |
|---|---|---|---|---|---|---|---|
| 2020-08-13 | 423-644-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | SODDYDAISY | TN |
| 2020-08-06 | 423-659-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | COPPERBSIN | TN |
| 2020-08-04 | 423-269-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | CHATTNOOGA | TN |
| 2020-07-28 | 423-640-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | SNEEDVILLE | TN |
| 2020-07-22 | 423-654-2XXX | 2000–2999 | Assigned | CSC WIRELESS, LLC | 425J | CHATTNOOGA | TN |
| 2020-07-22 | 423-656-2XXX | 2000–2999 | Assigned | CSC WIRELESS, LLC | 425J | JOHNSON CY | TN |
| 2020-07-16 | 423-873-2XXX | 2000–2999 | Assigned | FRACTEL, LLC | 965H | STONEY CRK | TN |
| 2020-07-16 | 423-922-2XXX | 2000–2999 | Assigned | FRACTEL, LLC | 965H | BAILEYTON | TN |
| 2020-07-16 | 423-955-5XXX | 5000–5999 | Assigned | FRACTEL, LLC | 965H | WHITWELL | TN |
| 2020-07-16 | 423-966-6XXX | 6000–6999 | Assigned | FRACTEL, LLC | 965H | BALL PLAY | TN |
| 2020-07-09 | 423-577-7XXX | 7000–7999 | Assigned | FRACTEL, LLC | 965H | ONEIDA | TN |
| 2020-07-09 | 423-644-4XXX | 4000–4999 | Assigned | FRACTEL, LLC | 965H | SODDYDAISY | TN |
| 2020-06-22 | 423-354-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | BLOUNTVL | TN |
| 2020-06-22 | 423-471-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | MOUNTAINCY | TN |
| 2020-06-22 | 423-471-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | MOUNTAINCY | TN |
| 2020-06-22 | 423-662-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | BLOUNTVL | TN |
| 2020-06-15 | 423-603-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | FORK RIDGE | TN |
| 2020-06-15 | 423-603-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | FORK RIDGE | TN |
| 2020-06-15 | 423-603-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | FORK RIDGE | TN |
| 2020-06-15 | 423-603-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | FORK RIDGE | TN |
| 2020-06-05 | 423-206-9XXX | 9000–9999 | Assigned | ELECTRIC POWER BOARD OF CHATTANOOGA | 4645 | CHATTNOOGA | TN |
| 2020-06-05 | 423-497-8XXX | 8000–8999 | Assigned | ELECTRIC POWER BOARD OF CHATTANOOGA | 4645 | CHATTNOOGA | TN |
| 2020-06-04 | 423-540-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | NEWPORT | TN |
| 2020-05-27 | 423-541-8XXX | 8000–8999 | Assigned | ELECTRIC POWER BOARD OF CHATTANOOGA | 4645 | CHATTNOOGA | TN |
| 2020-05-27 | 423-541-9XXX | 9000–9999 | Assigned | ELECTRIC POWER BOARD OF CHATTANOOGA | 4645 | CHATTNOOGA | TN |
| 2020-05-21 | 423-662-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | BLOUNTVL | TN |
| 2020-05-20 | 423-214-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | ENGLEWOOD | TN |
| 2020-05-20 | 423-214-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | ENGLEWOOD | TN |
| 2020-05-20 | 423-264-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | VONORE | TN |
| 2020-05-20 | 423-264-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | VONORE | TN |
| 2020-05-20 | 423-295-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | BALL PLAY | TN |
| 2020-05-20 | 423-295-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | BALL PLAY | TN |
| 2020-05-20 | 423-808-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | TELLICO PL | TN |
| 2020-05-20 | 423-808-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | TELLICO PL | TN |
| 2020-05-19 | 423-216-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | BENTON | TN |
| 2020-05-19 | 423-216-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | BENTON | TN |
| 2020-05-19 | 423-418-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | MIDWAY SUL | TN |
| 2020-05-19 | 423-418-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | MIDWAY SUL | TN |
| 2020-05-07 | 423-606-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | ENGLEWOOD | TN |
| 2020-04-13 | 423-523-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BULLS GAP | TN |
| 2020-04-13 | 423-814-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | SWEETWATER | TN |
| 2020-04-13 | 423-871-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | LAFOLLETTE | TN |
| 2020-04-06 | 423-633-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CHATTNOOGA | TN |
| 2020-04-06 | 423-633-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CHATTNOOGA | TN |
| 2020-04-06 | 423-633-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CHATTNOOGA | TN |
| 2020-04-06 | 423-633-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CHATTNOOGA | TN |
| 2020-04-06 | 423-633-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CHATTNOOGA | TN |
| 2020-04-06 | 423-633-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CHATTNOOGA | TN |
| 2020-04-06 | 423-977-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CHATTNOOGA | TN |
| 2020-04-06 | 423-977-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CHATTNOOGA | 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.