NumberResearchThousands-blocks in 909-525
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 909-525 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 909 blocks
Most active assignees, all time — NPA 909
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2003-10-14 | 909-525-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | POMONA | CA |
| 2024-08-15 | 909-525-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | POMONA | CA |
| 2004-11-24 | 909-525-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | POMONA | CA |
| 2004-10-05 | 909-525-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | POMONA | CA |
| 2002-12-18 | 909-525-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | POMONA | CA |
| 2003-05-21 | 909-525-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | POMONA | CA |
| 2003-02-24 | 909-525-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | POMONA | CA |
| 2003-02-24 | 909-525-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | POMONA | CA |
| 2003-05-21 | 909-525-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | POMONA | CA |
| 2000-12-08 | 909-525-9XXX | 9000–9999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | POMONA | 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.