NumberResearchThousands-blocks in 909-839
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 909-839 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 |
|---|---|---|---|---|---|---|---|
| — | 909-839-0XXX | 0000–0999 | Reserved | FRONTIER CALIFORNIA INC. | 2319 | DIAMONDBAR | CA |
| — | 909-839-1XXX | 1000–1999 | Reserved | FRONTIER CALIFORNIA INC. | 2319 | DIAMONDBAR | CA |
| — | 909-839-2XXX | 2000–2999 | Reserved | FRONTIER CALIFORNIA INC. | 2319 | DIAMONDBAR | CA |
| 2007-11-09 | 909-839-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DIAMONDBAR | CA |
| 2005-06-28 | 909-839-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DIAMONDBAR | CA |
| 2005-06-28 | 909-839-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DIAMONDBAR | CA |
| 2005-06-28 | 909-839-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DIAMONDBAR | CA |
| — | 909-839-7XXX | 7000–7999 | Reserved | FRONTIER CALIFORNIA INC. | 2319 | DIAMONDBAR | CA |
| — | 909-839-8XXX | 8000–8999 | Reserved | FRONTIER CALIFORNIA INC. | 2319 | DIAMONDBAR | CA |
| 2015-06-04 | 909-839-9XXX | 9000–9999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DIAMONDBAR | 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.