NumberResearchRecent thousands-block assignments
13 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 |
|---|---|---|---|---|---|---|---|
| 2023-10-10 | 423-271-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | SWEETWATER | TN |
| 2023-10-03 | 423-287-3XXX | 3000–3999 | Assigned | VONAGE AMERICA LLC | 197D | CHATTNOOGA | TN |
| 2023-10-03 | 423-872-3XXX | 3000–3999 | Assigned | VONAGE AMERICA LLC | 197D | CHATTNOOGA | TN |
| 2023-09-28 | 423-203-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2023-09-28 | 423-203-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2023-09-28 | 423-275-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2023-09-20 | 423-395-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | ATHENS | TN |
| 2023-09-19 | 423-900-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | JOHNSON CY | TN |
| 2023-09-19 | 423-919-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | NEWTAZWELL | TN |
| 2023-09-12 | 423-576-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | ELIZABTHTN | TN |
| 2023-09-12 | 423-889-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CLEVELAND | TN |
| 2023-09-12 | 423-889-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CLEVELAND | TN |
| 2023-09-12 | 423-889-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CLEVELAND | TN |
| 2023-09-06 | 423-862-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | SPRINGCITY | TN |
| 2023-09-06 | 423-862-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | SPRINGCITY | TN |
| 2023-09-06 | 423-862-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | SPRINGCITY | TN |
| 2023-09-06 | 423-862-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | SPRINGCITY | TN |
| 2023-09-06 | 423-890-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2023-09-06 | 423-890-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2023-09-06 | 423-890-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2023-09-06 | 423-890-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2023-09-06 | 423-890-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2023-09-06 | 423-890-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2023-09-06 | 423-890-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2023-09-06 | 423-890-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2023-09-06 | 423-890-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2023-09-06 | 423-890-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2023-08-30 | 423-889-9XXX | 9000–9999 | Assigned | POWERTEL ATLANTA LICENSES, INC. | 7473 | CLEVELAND | TN |
| 2023-08-29 | 423-675-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | JASPER | TN |
| 2023-08-29 | 423-675-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | JASPER | TN |
| 2023-08-29 | 423-675-5XXX | 5000–5999 | Assigned | COMMIO, LLC | 939H | JASPER | TN |
| 2023-08-29 | 423-675-7XXX | 7000–7999 | Assigned | COMMIO, LLC | 939H | JASPER | TN |
| 2023-08-29 | 423-675-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | JASPER | TN |
| 2023-08-29 | 423-841-8XXX | 8000–8999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | MOUNTAINCY | TN |
| 2023-08-22 | 423-249-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | FORK RIDGE | TN |
| 2023-08-22 | 423-513-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | VONORE | TN |
| 2023-08-22 | 423-600-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | APISON | TN |
| 2023-08-22 | 423-659-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | COPPERBSIN | TN |
| 2023-08-22 | 423-678-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | ROAN MT | TN |
| 2023-08-22 | 423-703-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | COKERCREEK | TN |
| 2023-08-22 | 423-730-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | RICEVILLE | TN |
| 2023-08-22 | 423-749-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | COLLEGEDL | TN |
| 2023-08-22 | 423-862-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | SPRINGCITY | TN |
| 2023-08-22 | 423-866-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | NIOTA | TN |
| 2023-08-22 | 423-868-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | MOSHEIM | TN |
| 2023-08-22 | 423-879-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | GEORGETOWN | TN |
| 2023-08-22 | 423-909-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | SO PITTSBG | TN |
| 2023-08-17 | 423-516-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | SULIVNGDNS | TN |
| 2023-08-17 | 423-550-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | MIDWAY | TN |
| 2023-08-17 | 423-726-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | MIDWAY SUL | TN |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.