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 |
|---|---|---|---|---|---|---|---|
| 2023-08-17 | 423-932-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | ETOWAH | TN |
| 2023-08-11 | 423-669-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | BENTON | TN |
| 2023-08-11 | 423-786-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | BLUFF CITY | TN |
| 2023-08-11 | 423-824-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | ERWIN | TN |
| 2023-08-11 | 423-858-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | BLOUNTVL | TN |
| 2023-08-11 | 423-858-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | BLOUNTVL | TN |
| 2023-08-10 | 423-275-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | CHATTNOOGA | TN |
| 2023-08-10 | 423-373-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | BULLS GAP | TN |
| 2023-08-10 | 423-376-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | MADISONVL | TN |
| 2023-08-10 | 423-379-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | NEWPORT | TN |
| 2023-08-10 | 423-379-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | NEWPORT | TN |
| 2023-08-10 | 423-387-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | BRISTOL | TN |
| 2023-08-10 | 423-395-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | ATHENS | TN |
| 2023-08-10 | 423-395-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | ATHENS | TN |
| 2023-08-10 | 423-419-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | CUMBERLDGP | TN |
| 2023-08-10 | 423-522-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | MORRISTOWN | TN |
| 2023-08-10 | 423-522-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | MORRISTOWN | TN |
| 2023-08-10 | 423-522-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | MORRISTOWN | TN |
| 2023-08-10 | 423-527-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | SODDYDAISY | TN |
| 2023-08-10 | 423-576-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | ELIZABTHTN | TN |
| 2023-08-10 | 423-576-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | ELIZABTHTN | TN |
| 2023-08-10 | 423-674-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | DAYTON | TN |
| 2023-08-10 | 423-766-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | LIMESTONE | TN |
| 2023-08-10 | 423-770-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | CHURCHHILL | TN |
| 2023-08-10 | 423-819-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | CLEVELAND | TN |
| 2023-08-10 | 423-819-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | CLEVELAND | TN |
| 2023-08-10 | 423-819-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | CLEVELAND | TN |
| 2023-08-10 | 423-841-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | MOUNTAINCY | TN |
| 2023-08-10 | 423-849-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | JOHNSON CY | TN |
| 2023-08-10 | 423-849-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | JOHNSON CY | TN |
| 2023-08-10 | 423-864-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | DECATUR | TN |
| 2023-08-10 | 423-925-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | LAFOLLETTE | TN |
| 2023-08-07 | 423-577-0XXX | 0000–0999 | Assigned | COMCAST IP PHONE, LLC | 318J | ONEIDA | TN |
| 2023-08-07 | 423-719-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | CHATTNOOGA | TN |
| 2023-08-07 | 423-866-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | NIOTA | TN |
| 2023-08-07 | 423-872-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | CHATTNOOGA | TN |
| 2023-08-07 | 423-874-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | CHATTNOOGA | TN |
| 2023-08-07 | 423-874-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | CHATTNOOGA | TN |
| 2023-08-07 | 423-893-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | CHATTNOOGA | TN |
| 2023-08-01 | 423-864-4XXX | 4000–4999 | Assigned | COMMIO, LLC | 939H | DECATUR | TN |
| 2023-08-01 | 423-864-5XXX | 5000–5999 | Assigned | COMMIO, LLC | 939H | DECATUR | TN |
| 2023-08-01 | 423-864-7XXX | 7000–7999 | Assigned | COMMIO, LLC | 939H | DECATUR | TN |
| 2023-08-01 | 423-864-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | DECATUR | TN |
| 2023-08-01 | 423-864-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | DECATUR | TN |
| 2023-07-31 | 423-632-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | WARTBURG | TN |
| 2023-07-27 | 423-769-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BENTON | TN |
| 2023-07-27 | 423-769-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BENTON | TN |
| 2023-07-20 | 423-203-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2023-07-20 | 423-203-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2023-07-20 | 423-691-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | ATHENS | 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.