NumberResearchThousands-blocks in 909-258
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 909-258 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 |
|---|---|---|---|---|---|---|---|
| 2008-07-22 | 909-258-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | RIALTO | CA |
| 2009-12-29 | 909-258-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | RIALTO | CA |
| 2008-09-10 | 909-258-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | RIALTO | CA |
| 2008-09-10 | 909-258-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | RIALTO | CA |
| 2010-10-20 | 909-258-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RIALTO | CA |
| 2011-02-16 | 909-258-5XXX | 5000–5999 | Assigned | METROPCS NETWORKS, LLC | 899D | RIALTO | CA |
| 2008-09-30 | 909-258-6XXX | 6000–6999 | Assigned | METROPCS NETWORKS, LLC | 899D | RIALTO | CA |
| 2008-09-30 | 909-258-7XXX | 7000–7999 | Assigned | METROPCS NETWORKS, LLC | 899D | RIALTO | CA |
| 2008-09-30 | 909-258-8XXX | 8000–8999 | Assigned | METROPCS NETWORKS, LLC | 899D | RIALTO | CA |
| 2008-10-23 | 909-258-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RIALTO | 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.