NumberResearchThousands-blocks in 707-574
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 707-574 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
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 |
|---|---|---|---|---|---|---|---|
| — | 707-574-0XXX | 0000–0999 | Available | MAD RIVER | CA | ||
| 2021-10-25 | 707-574-1XXX | 1000–1999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | MAD RIVER | CA |
| 2014-05-12 | 707-574-2XXX | 2000–2999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | MAD RIVER | CA |
| 2018-11-30 | 707-574-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | MAD RIVER | CA |
| 2018-07-03 | 707-574-4XXX | 4000–4999 | Assigned | INTEGRATED PATH COMMUNICATIONS, LLC - CA | 707H | MAD RIVER | CA |
| 2018-08-28 | 707-574-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | MAD RIVER | CA |
| — | 707-574-6XXX | 6000–6999 | Reserved | FRONTIER CALIFORNIA INC. | 4420 | MAD RIVER | CA |
| 2013-03-05 | 707-574-7XXX | 7000–7999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | MAD RIVER | CA |
| 2009-01-28 | 707-574-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MAD RIVER | CA |
| 2017-07-25 | 707-574-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | MAD RIVER | 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.