NumberResearchThousands-blocks in 951-491
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 951-491 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 951 blocks
Most active assignees, all time — NPA 951
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 951-491-0XXX | 0000–0999 | Reserved | FRONTIER CALIFORNIA INC. | 2319 | TEMECULA | CA |
| 2003-10-10 | 951-491-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TEMECULA | CA |
| 2001-05-28 | 951-491-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | TEMECULA | CA |
| 2003-10-10 | 951-491-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TEMECULA | CA |
| 2002-11-25 | 951-491-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TEMECULA | CA |
| 2002-11-08 | 951-491-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | TEMECULA | CA |
| 2002-06-21 | 951-491-6XXX | 6000–6999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | TEMECULA | CA |
| 2003-09-03 | 951-491-7XXX | 7000–7999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | TEMECULA | CA |
| 2003-09-11 | 951-491-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | TEMECULA | CA |
| 2002-11-08 | 951-491-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | TEMECULA | 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.