NumberResearchRecent thousands-block assignments
5 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 731
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 |
|---|---|---|---|---|---|---|---|
| 2023-07-12 | 731-233-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | GREENFIELD | TN |
| 2023-06-26 | 731-477-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MEDINA | TN |
| 2023-06-22 | 731-216-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2023-06-22 | 731-230-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2023-06-22 | 731-230-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2023-06-22 | 731-230-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2023-06-22 | 731-230-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2023-06-22 | 731-230-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2023-06-22 | 731-230-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2023-06-22 | 731-230-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2023-06-22 | 731-230-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PARIS | TN |
| 2023-05-31 | 731-529-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MICHIE | TN |
| 2023-05-25 | 731-928-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | JACKSON | 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 | 731-273-7XXX | 7000–7999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | HUMBOLDT | 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 |
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.