NumberResearchRecent thousands-block assignments
0 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, all time — NPA 731
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-06-30 | 731-531-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CEDARGROVE | TN |
| 2024-11-15 | 731-251-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DECATURVL | TN |
| 2024-11-15 | 731-252-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BRUCETON | TN |
| 2024-11-15 | 731-321-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SCOTTSHILL | TN |
| 2024-11-15 | 731-500-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | PARSONS | TN |
| 2024-11-15 | 731-858-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SARDIS | TN |
| 2024-10-22 | 731-788-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MICHIE | TN |
| 2023-11-08 | 731-226-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JACKSON | TN |
| 2023-11-08 | 731-226-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JACKSON | TN |
| 2023-11-08 | 731-410-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JACKSON | TN |
| 2023-11-08 | 731-513-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JACKSON | TN |
| 2023-11-08 | 731-513-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JACKSON | TN |
| 2023-05-31 | 731-529-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MICHIE | TN |
| 2023-05-10 | 731-216-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | PARIS | TN |
| 2023-05-10 | 731-226-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JACKSON | TN |
| 2023-05-10 | 731-246-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | UNION CITY | TN |
| 2023-05-10 | 731-255-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MARTIN | TN |
| 2023-05-10 | 731-258-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | KENTON | TN |
| 2023-05-10 | 731-276-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | LATHAM | TN |
| 2023-05-10 | 731-280-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SHILOH | TN |
| 2023-05-10 | 731-309-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MILLEDGEVL | TN |
| 2023-05-10 | 731-310-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TROY | TN |
| 2023-05-10 | 731-319-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TIPTONVL | TN |
| 2023-05-10 | 731-453-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SELMER | TN |
| 2023-05-10 | 731-458-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SAVANNAH | TN |
| 2023-05-10 | 731-460-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | RIPLEY | TN |
| 2023-05-10 | 731-477-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MEDINA | TN |
| 2023-05-10 | 731-497-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | RIDGELY | TN |
| 2023-05-10 | 731-533-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | PALMERSVL | TN |
| 2023-05-10 | 731-600-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MCKENZIE | TN |
| 2023-05-10 | 731-628-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | NEWBERN | TN |
| 2023-05-10 | 731-703-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SHARON | TN |
| 2023-05-10 | 731-766-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TRENTON | TN |
| 2023-05-10 | 731-770-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WHITEVILLE | TN |
| 2023-05-10 | 731-831-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SIDONIA | TN |
| 2023-05-10 | 731-837-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MIDDLETON | TN |
| 2023-05-10 | 731-980-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | LEXINGTON | TN |
| 2023-05-10 | 731-995-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MILAN | TN |
| 2023-05-09 | 731-214-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CEDARGROVE | TN |
| 2023-05-09 | 731-219-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | GIBSON | TN |
| 2023-05-09 | 731-233-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | GREENFIELD | TN |
| 2023-05-09 | 731-236-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | GRAND JCT | TN |
| 2023-05-09 | 731-242-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HUNTINGDON | TN |
| 2023-05-09 | 731-260-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HENNING | TN |
| 2023-05-09 | 731-277-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BROWNSVL | TN |
| 2023-05-09 | 731-283-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DYER | TN |
| 2023-05-09 | 731-284-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HORNBEAK | TN |
| 2023-05-09 | 731-290-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BETHEL SPG | TN |
| 2023-05-09 | 731-291-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BELLS | TN |
| 2023-05-09 | 731-331-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BOLIVAR | 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.