NumberResearchRecent thousands-block assignments
81 blocks assigned in March 2026 · 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, March 2026 — NPA 580
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-03-31 | 580-500-0XXX | 0000–0999 | Assigned | EXIANT COMMUNICATIONS LLC | 114J | CLINTON | OK |
| 2026-03-24 | 580-376-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | IDABEL | OK |
| 2026-03-20 | 580-457-1XXX | 1000–1999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | LAWTON | OK |
| 2026-03-19 | 580-692-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ARDMORE | OK |
| 2026-03-16 | 580-228-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | WAURIKA | OK |
| 2026-03-16 | 580-409-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | TUPELO | OK |
| 2026-03-16 | 580-410-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | WAPANUCKA | OK |
| 2026-03-16 | 580-450-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | WALTERS | OK |
| 2026-03-16 | 580-469-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | SAYRE | OK |
| 2026-03-16 | 580-502-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | WILSON | OK |
| 2026-03-16 | 580-505-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | WOODWARD | OK |
| 2026-03-16 | 580-557-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | TONKAWA | OK |
| 2026-03-16 | 580-619-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | SOPER | OK |
| 2026-03-16 | 580-627-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | STRATFORD | OK |
| 2026-03-16 | 580-640-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | TISHOMINGO | OK |
| 2026-03-16 | 580-650-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | WEATHERFD | OK |
| 2026-03-16 | 580-757-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | RYAN | OK |
| 2026-03-16 | 580-758-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | WAUKOMIS | OK |
| 2026-03-13 | 580-268-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | MARLAND | OK |
| 2026-03-13 | 580-288-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | KREMLIN | OK |
| 2026-03-13 | 580-300-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | MARIETTA | OK |
| 2026-03-13 | 580-316-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | MADILL | OK |
| 2026-03-13 | 580-336-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | PERRY | OK |
| 2026-03-13 | 580-395-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | MEDFORD | OK |
| 2026-03-13 | 580-396-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | MORRISON | OK |
| 2026-03-13 | 580-401-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | PONCA CITY | OK |
| 2026-03-13 | 580-404-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | ROFF | OK |
| 2026-03-13 | 580-408-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | RATTAN | OK |
| 2026-03-13 | 580-413-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | RED ROCK | OK |
| 2026-03-13 | 580-457-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | LAWTON | OK |
| 2026-03-13 | 580-476-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | RUSH SPG | OK |
| 2026-03-13 | 580-498-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | KONAWA | OK |
| 2026-03-13 | 580-499-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | MANGUM | OK |
| 2026-03-13 | 580-608-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | KINGSTON | OK |
| 2026-03-13 | 580-610-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | LONE WOLF | OK |
| 2026-03-13 | 580-641-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | MARLOW | OK |
| 2026-03-13 | 580-662-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | RINGLING | OK |
| 2026-03-13 | 580-666-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | ROCKY | OK |
| 2026-03-13 | 580-992-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | NEWKIRK | OK |
| 2026-03-09 | 580-201-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | GRANITE | OK |
| 2026-03-09 | 580-246-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | INDIAHOMA | OK |
| 2026-03-09 | 580-325-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | HILLSDALE | OK |
| 2026-03-09 | 580-376-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | IDABEL | OK |
| 2026-03-09 | 580-607-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | HEADRICK | OK |
| 2026-03-09 | 580-682-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | HOBART | OK |
| 2026-03-09 | 580-825-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | HITCHCOCK | OK |
| 2026-03-09 | 580-882-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | HEALDTON | OK |
| 2026-03-09 | 580-969-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | HUGO | OK |
| 2026-03-06 | 580-202-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | CORDELL | OK |
| 2026-03-06 | 580-205-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | BENNINGTON | OK |
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.