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 531
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2023-11-09 | 531-350-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | LINCOLN | NE |
| 2022-03-28 | 531-238-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | RANDOLPH | NE |
| 2022-03-28 | 531-900-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | WEST POINT | NE |
| 2022-03-23 | 531-236-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | HUMPHREY | NE |
| 2022-03-23 | 531-275-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | HOWELLS | NE |
| 2022-03-23 | 531-292-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | VALENTINE | NE |
| 2022-03-22 | 531-268-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | ATKINSON | NE |
| 2022-03-22 | 531-274-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | WAYNE | NE |
| 2022-03-22 | 531-281-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | TEKAMAH | NE |
| 2022-03-22 | 531-776-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | AINSWORTH | NE |
| 2021-05-06 | 531-267-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | OMAHA | NE |
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.