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 925
New assignments by month
Sep 2026
Aug 2026
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Apr 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-08-04 | 925-317-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | ORINDA | CA |
| 2016-08-17 | 925-241-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | DUBLN-SNRM | CA |
| 2016-08-17 | 925-257-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | ORINDA | CA |
| 2016-08-17 | 925-266-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | WALNUT CRK | CA |
| 2016-08-17 | 925-267-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | PITTSBURG | CA |
| 2016-08-17 | 925-320-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | MORAGA | CA |
| 2016-08-17 | 925-375-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | CONCORD | CA |
| 2016-08-17 | 925-380-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | BSHP RNCH | CA |
| 2016-08-17 | 925-390-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | ECONTRCOST | CA |
| 2016-08-17 | 925-444-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | LAFAYETTE | CA |
| 2016-08-17 | 925-495-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | LIVERMORE | CA |
| 2016-08-17 | 925-517-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | PSBG WEST | CA |
| 2016-08-17 | 925-584-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | ANTIOCH | CA |
| 2016-08-17 | 925-623-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | PLEASANTON | CA |
| 2016-08-17 | 925-693-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | CLAYTON | CA |
| 2016-08-17 | 925-723-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | MARTINEZ | CA |
| 2016-08-17 | 925-725-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | DANVILLE | CA |
| 2016-08-17 | 925-835-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | SUNOL | CA |
| 2003-09-23 | 925-233-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | SUNOL | CA |
| 2003-09-23 | 925-317-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | ORINDA | CA |
| 2003-09-23 | 925-635-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | PITTSBURG | CA |
| 2003-09-23 | 925-635-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | PITTSBURG | CA |
| 2003-09-23 | 925-659-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | BSHP RNCH | CA |
| 2003-09-23 | 925-659-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | BSHP RNCH | CA |
| 2002-09-17 | 925-566-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | CONCORD | CA |
| 2002-09-17 | 925-566-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | CONCORD | CA |
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.