NumberResearchThousands-blocks in 805-464
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 805-464 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 805 blocks
Most active assignees, all time — NPA 805
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 805-464-0XXX | 0000–0999 | Reserved | PACIFIC BELL | 9740 | ATASCADERO | CA |
| 2003-08-06 | 805-464-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | ATASCADERO | CA |
| 2008-06-25 | 805-464-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | ATASCADERO | CA |
| 2008-04-14 | 805-464-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ATASCADERO | CA |
| 2003-04-15 | 805-464-4XXX | 4000–4999 | Assigned | NORCAST COMMUNICATIONS CORPORATION - CA | 9807 | ATASCADERO | CA |
| 2005-07-27 | 805-464-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | ATASCADERO | CA |
| 2010-02-03 | 805-464-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ATASCADERO | CA |
| 2010-09-02 | 805-464-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ATASCADERO | CA |
| 2008-06-30 | 805-464-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | ATASCADERO | CA |
| 2006-06-13 | 805-464-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | ATASCADERO | 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.