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 |
|---|---|---|---|---|---|---|---|
| 2023-05-18 | 423-236-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | APISON | TN |
| 2023-05-18 | 423-259-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | NEWTAZWELL | TN |
| 2023-05-18 | 423-347-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ROGERSVL | TN |
| 2023-05-18 | 423-372-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JELLICO | TN |
| 2023-05-18 | 423-373-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BULLS GAP | TN |
| 2023-05-18 | 423-382-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SNEEDVILLE | TN |
| 2023-05-18 | 423-395-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ATHENS | TN |
| 2023-05-18 | 423-404-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MADISONVL | TN |
| 2023-05-18 | 423-407-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SPRINGCITY | TN |
| 2023-05-18 | 423-445-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SURGOINSVL | TN |
| 2023-05-18 | 423-487-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | NEWPORT | TN |
| 2023-05-18 | 423-522-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MORRISTOWN | TN |
| 2023-05-18 | 423-527-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SODDYDAISY | TN |
| 2023-05-18 | 423-589-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | GEORGETOWN | TN |
| 2023-05-18 | 423-659-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | COPPERBSIN | TN |
| 2023-05-18 | 423-674-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DAYTON | TN |
| 2023-05-18 | 423-675-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JASPER | TN |
| 2023-05-18 | 423-679-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | OOLTEWAH | TN |
| 2023-05-18 | 423-694-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SWEETWATER | TN |
| 2023-05-18 | 423-749-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | COLLEGEDL | TN |
| 2023-05-18 | 423-769-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BENTON | TN |
| 2023-05-18 | 423-819-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CLEVELAND | TN |
| 2023-05-18 | 423-829-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHARLESTON | TN |
| 2023-05-18 | 423-909-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SO PITTSBG | TN |
| 2023-05-18 | 423-925-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | LAFOLLETTE | TN |
| 2023-05-18 | 423-932-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ETOWAH | TN |
| 2023-05-18 | 423-955-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WHITWELL | TN |
| 2023-05-05 | 423-849-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2023-05-05 | 423-849-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2023-05-05 | 423-849-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2023-05-05 | 423-849-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2023-05-05 | 423-849-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2023-05-05 | 423-849-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2023-05-05 | 423-849-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2023-05-05 | 423-849-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | JOHNSON CY | TN |
| 2023-05-04 | 423-966-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BALL PLAY | TN |
| 2023-04-18 | 423-420-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | MADISONVL | TN |
| 2023-04-13 | 423-395-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | ATHENS | TN |
| 2023-04-13 | 423-686-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | FORK RIDGE | TN |
| 2023-04-13 | 423-719-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | CHATTNOOGA | TN |
| 2023-04-13 | 423-719-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | CHATTNOOGA | TN |
| 2023-04-13 | 423-835-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | BRISTOL | TN |
| 2023-04-10 | 423-730-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | RICEVILLE | TN |
| 2023-04-06 | 423-841-9XXX | 9000–9999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | MOUNTAINCY | TN |
| 2023-04-05 | 423-264-8XXX | 8000–8999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | VONORE | TN |
| 2023-03-28 | 423-550-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MIDWAY | TN |
| 2023-03-28 | 423-666-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ELIZABTHTN | TN |
| 2023-03-28 | 423-766-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | LIMESTONE | TN |
| 2023-03-28 | 423-770-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHURCHHILL | TN |
| 2023-03-28 | 423-812-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | GREENEVL | 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.