NumberResearchThousands-blocks in 805-742
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 805-742 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 805-742-0XXX | 0000–0999 | Reserved | FRONTIER CALIFORNIA INC. | 2319 | LOMPOC | CA |
| 2021-10-01 | 805-742-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | LOMPOC | CA |
| 2004-08-27 | 805-742-2XXX | 2000–2999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | LOMPOC | CA |
| 2004-08-27 | 805-742-3XXX | 3000–3999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | LOMPOC | CA |
| 2005-07-06 | 805-742-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LOMPOC | CA |
| 2021-10-01 | 805-742-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | LOMPOC | CA |
| 2006-01-12 | 805-742-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LOMPOC | CA |
| 2005-07-28 | 805-742-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LOMPOC | CA |
| 2017-03-15 | 805-742-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | LOMPOC | CA |
| 2018-01-16 | 805-742-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | LOMPOC | 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.