NumberResearchRecent thousands-block assignments
81 blocks assigned in March 2026 · 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, March 2026 — NPA 580
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
Clear
| 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 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.