NumberResearchThousands-blocks in 909-570
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 909-570 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
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 |
|---|---|---|---|---|---|---|---|
| 2009-02-27 | 909-570-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CALIMESA | CA |
| 2010-02-03 | 909-570-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CALIMESA | CA |
| 2005-06-20 | 909-570-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CALIMESA | CA |
| 2004-06-03 | 909-570-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | CALIMESA | CA |
| 2009-04-08 | 909-570-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CALIMESA | CA |
| 2024-10-22 | 909-570-5XXX | 5000–5999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | CALIMESA | CA |
| — | 909-570-6XXX | 6000–6999 | Reserved | PACIFIC BELL (COMPETITIVE) | 7480 | CALIMESA | CA |
| 2008-04-04 | 909-570-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CALIMESA | CA |
| 2008-05-20 | 909-570-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | CALIMESA | CA |
| 2006-12-05 | 909-570-9XXX | 9000–9999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CALIMESA | 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.