NumberResearchThousands-blocks in 805-438
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 805-438 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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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 805-438-0XXX | 0000–0999 | Available | SANMARGART | CA | ||
| — | 805-438-1XXX | 1000–1999 | Reserved | PACIFIC BELL | 9740 | SANMARGART | CA |
| 2005-07-06 | 805-438-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SANMARGART | CA |
| — | 805-438-3XXX | 3000–3999 | Reserved | PACIFIC BELL | 9740 | SANMARGART | CA |
| — | 805-438-4XXX | 4000–4999 | Reserved | PACIFIC BELL | 9740 | SANMARGART | CA |
| — | 805-438-5XXX | 5000–5999 | Reserved | PACIFIC BELL | 9740 | SANMARGART | CA |
| 2012-12-21 | 805-438-6XXX | 6000–6999 | Assigned | NORCAST COMMUNICATIONS CORPORATION - CA | 9807 | SANMARGART | CA |
| 2013-01-24 | 805-438-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SANMARGART | CA |
| 2005-07-27 | 805-438-8XXX | 8000–8999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SANMARGART | CA |
| 2021-03-19 | 805-438-9XXX | 9000–9999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | SANMARGART | 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.