NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · 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, all time — NPA 251
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-05-29 | 251-203-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | BELLEFONTN | AL |
| 2026-05-29 | 251-247-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | JACKSON | AL |
| 2026-05-29 | 251-296-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | FLOMATON | AL |
| 2026-05-29 | 251-346-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | EVERGREEN | AL |
| 2026-05-29 | 251-350-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | BAYMINETTE | AL |
| 2026-05-29 | 251-365-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | CITRONELLE | AL |
| 2026-05-29 | 251-412-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | MCINTOSH | AL |
| 2026-05-29 | 251-506-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | FAIRHOPE | AL |
| 2026-05-29 | 251-531-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | MT VERNON | AL |
| 2026-05-29 | 251-727-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | BREWTON | AL |
| 2026-05-26 | 251-469-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | MOBILE | AL |
| 2026-05-26 | 251-469-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | MOBILE | AL |
| 2021-09-14 | 251-373-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | MOBILE | AL |
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.