NumberResearchThousands-blocks in 909-372
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 909-372 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-01-26 | 909-372-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CALIMESA | CA |
| 2015-03-03 | 909-372-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CALIMESA | CA |
| 2015-05-21 | 909-372-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CALIMESA | CA |
| 2013-04-08 | 909-372-3XXX | 3000–3999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | CALIMESA | CA |
| 2013-04-08 | 909-372-4XXX | 4000–4999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | CALIMESA | CA |
| 2015-08-24 | 909-372-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CALIMESA | CA |
| 2016-12-12 | 909-372-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CALIMESA | CA |
| 2014-06-16 | 909-372-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | CALIMESA | CA |
| 2015-04-13 | 909-372-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CALIMESA | CA |
| 2015-02-18 | 909-372-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | 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.