NumberResearchThousands-blocks in 707-375
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 707-375 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 707 blocks
Most active assignees, all time — NPA 707
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 707-375-0XXX | 0000–0999 | Reserved | BCM ONE CLOUD COMMUNICATIONS, LLC | 683G | RIO VISTA | CA |
| — | 707-375-1XXX | 1000–1999 | Reserved | CITIZENS TELECOM CA. DBA FRONTIER COM OF CA | 2308 | RIO VISTA | CA |
| — | 707-375-2XXX | 2000–2999 | Reserved | UTILITY TELECOM GROUP, LLC - CA | 9262 | RIO VISTA | CA |
| 2017-07-10 | 707-375-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RIO VISTA | CA |
| 2005-07-11 | 707-375-4XXX | 4000–4999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | RIO VISTA | CA |
| 2022-05-24 | 707-375-5XXX | 5000–5999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | RIO VISTA | CA |
| 2020-04-16 | 707-375-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | RIO VISTA | CA |
| 2006-05-03 | 707-375-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | RIO VISTA | CA |
| 2015-03-10 | 707-375-8XXX | 8000–8999 | Assigned | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | RIO VISTA | CA |
| 2018-11-30 | 707-375-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | RIO VISTA | 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.