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 737
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-03-31 | 737-361-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | TAYLOR | TX |
| 2025-03-31 | 737-361-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | TAYLOR | TX |
| 2025-03-31 | 737-380-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | LAMPASAS | TX |
| 2025-03-31 | 737-380-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | LAMPASAS | TX |
| 2025-03-31 | 737-413-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | SMITHVILLE | TX |
| 2025-03-31 | 737-413-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | SMITHVILLE | TX |
| 2025-03-31 | 737-417-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | LIBERTY HL | TX |
| 2025-03-31 | 737-417-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | LIBERTY HL | TX |
| 2025-03-31 | 737-983-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | LOCKHART | TX |
| 2025-03-31 | 737-983-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | LOCKHART | TX |
| 2025-02-26 | 737-322-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | ADAMSVILLE | TX |
| 2025-02-26 | 737-322-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | ADAMSVILLE | TX |
| 2025-02-26 | 737-415-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | AUSTIN | TX |
| 2025-02-26 | 737-415-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | AUSTIN | TX |
| 2025-02-26 | 737-416-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | ELGIN | TX |
| 2025-02-26 | 737-416-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | ELGIN | TX |
| 2021-05-12 | 737-537-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | LAMPASAS | TX |
| 2021-05-12 | 737-677-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | SMITHVILLE | TX |
| 2021-05-12 | 737-734-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | LIBERTY HL | TX |
| 2021-05-12 | 737-946-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | ADAMSVILLE | TX |
| 2021-02-22 | 737-264-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | LOCKHART | TX |
| 2021-02-22 | 737-278-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | BASTROP | TX |
| 2021-02-22 | 737-338-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | ELGIN | TX |
| 2021-02-22 | 737-766-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | LEANDER | TX |
| 2021-02-22 | 737-837-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | TAYLOR | TX |
| 2020-09-29 | 737-281-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | AUSTIN | TX |
| 2016-06-15 | 737-443-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | AUSTIN | TX |
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.