NumberResearchRecent thousands-block assignments
0 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, all time — NPA 501
New assignments by month
Sep 2026
Aug 2026
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Jun 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-06-12 | 501-383-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | SEARCY | AR |
| 2026-06-12 | 501-383-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | SEARCY | AR |
| 2026-06-12 | 501-484-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | SPRINGLAKE | AR |
| 2026-06-12 | 501-608-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | SYVNHLSHWD | AR |
| 2026-06-12 | 501-608-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | SYVNHLSHWD | AR |
| 2026-06-12 | 501-770-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | WRIGHTSVL | AR |
| 2026-06-12 | 501-770-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | WRIGHTSVL | AR |
| 2026-06-12 | 501-790-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | PARON | AR |
| 2026-06-12 | 501-790-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | PARON | AR |
| 2026-06-12 | 501-798-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | PINNACLE | AR |
| 2026-06-12 | 501-798-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | PINNACLE | AR |
| 2026-06-12 | 501-942-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | SCOTT | AR |
| 2026-06-12 | 501-942-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | SCOTT | AR |
| 2026-06-03 | 501-365-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | HEBER SPG | AR |
| 2026-06-03 | 501-365-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | HEBER SPG | AR |
| 2026-06-03 | 501-489-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | MALVERN | AR |
| 2026-06-03 | 501-489-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | MALVERN | AR |
| 2026-06-03 | 501-494-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | JESSIEVL | AR |
| 2026-06-03 | 501-494-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | JESSIEVL | AR |
| 2026-06-03 | 501-495-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | LONSDALE | AR |
| 2026-06-03 | 501-495-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | LONSDALE | AR |
| 2026-06-03 | 501-577-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | LONOKE | AR |
| 2026-06-03 | 501-577-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | LONOKE | AR |
| 2026-06-03 | 501-597-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | HOTSPRINGS | AR |
| 2026-06-03 | 501-597-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | HOTSPRINGS | AR |
| 2026-06-03 | 501-598-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | PALARM | AR |
| 2026-06-03 | 501-598-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | PALARM | AR |
| 2026-06-03 | 501-652-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | MORRILTON | AR |
| 2026-06-03 | 501-652-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | MORRILTON | AR |
| 2026-06-03 | 501-815-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | JONESMILLS | AR |
| 2026-06-03 | 501-815-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | JONESMILLS | AR |
| 2026-06-01 | 501-461-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | BAUXITE | AR |
| 2026-06-01 | 501-461-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | BAUXITE | AR |
| 2026-06-01 | 501-468-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | CLEVELAND | AR |
| 2026-06-01 | 501-468-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | CLEVELAND | AR |
| 2026-06-01 | 501-493-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | CRYSTALSPG | AR |
| 2026-06-01 | 501-493-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | CRYSTALSPG | AR |
| 2026-06-01 | 501-567-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | CENTER RDG | AR |
| 2026-06-01 | 501-567-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | CENTER RDG | AR |
| 2026-06-01 | 501-578-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | FERNDALE | AR |
| 2026-06-01 | 501-578-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | FERNDALE | AR |
| 2026-06-01 | 501-582-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | BENTON | AR |
| 2026-06-01 | 501-582-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | BENTON | AR |
| 2026-06-01 | 501-586-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | CONWAY | AR |
| 2026-06-01 | 501-586-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | CONWAY | AR |
| 2026-06-01 | 501-591-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | BEEBE | AR |
| 2026-06-01 | 501-591-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | BEEBE | AR |
| 2026-06-01 | 501-595-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | BRYANTCGVL | AR |
| 2026-06-01 | 501-595-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | BRYANTCGVL | AR |
| 2026-06-01 | 501-832-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | GREERSFRRY | AR |
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.