NumberResearchRecent thousands-block assignments
21 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 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
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 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 |
| 2026-03-06 | 580-207-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | ATOKA | OK |
| 2026-03-06 | 580-218-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | BRECKENRDG | OK |
| 2026-03-06 | 580-247-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | DAVIS | OK |
| 2026-03-06 | 580-275-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | CLINTON | OK |
| 2026-03-06 | 580-301-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | ALTUS | OK |
| 2026-03-06 | 580-329-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | CARRIER | OK |
| 2026-03-06 | 580-337-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | BESSIE | OK |
| 2026-03-06 | 580-356-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | ENID | OK |
| 2026-03-06 | 580-358-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | FAIRMONT | OK |
| 2026-03-06 | 580-367-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | CADDO | OK |
| 2026-03-06 | 580-374-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | ELK CITY | OK |
| 2026-03-06 | 580-394-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | GLENCOE | OK |
| 2026-03-06 | 580-412-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | FAIRVIEW | OK |
| 2026-03-06 | 580-422-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | BILLINGS | OK |
| 2026-03-06 | 580-489-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | FORTTOWSON | OK |
| 2026-03-06 | 580-501-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | ADA | OK |
| 2026-03-06 | 580-506-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | CACHE | OK |
| 2026-03-06 | 580-563-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | BLAIR | OK |
| 2026-03-06 | 580-566-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | BOSWELL | 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.