NumberResearchThousands-blocks in 805-931
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 805-931 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
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 805-931-0XXX | 0000–0999 | Reserved | PACIFIC BELL | 9740 | NIPOMO | CA |
| 2016-06-03 | 805-931-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | NIPOMO | CA |
| — | 805-931-2XXX | 2000–2999 | Reserved | PACIFIC BELL | 9740 | NIPOMO | CA |
| 2018-06-19 | 805-931-3XXX | 3000–3999 | Assigned | TELNYX LLC | 073H | NIPOMO | CA |
| 2011-02-03 | 805-931-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | NIPOMO | CA |
| 2007-08-08 | 805-931-5XXX | 5000–5999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | NIPOMO | CA |
| 2008-12-17 | 805-931-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | NIPOMO | CA |
| 2005-07-27 | 805-931-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | NIPOMO | CA |
| 2011-11-10 | 805-931-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NIPOMO | CA |
| 2014-10-21 | 805-931-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | NIPOMO | 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.