NumberResearchThousands-blocks in 707-563
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 707-563 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2014-10-01 | 707-563-0XXX | 0000–0999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | VALLEJO | CA |
| 2015-04-22 | 707-563-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | VALLEJO | CA |
| — | 707-563-2XXX | 2000–2999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | VALLEJO | CA |
| 2006-08-04 | 707-563-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VALLEJO | CA |
| 2007-07-20 | 707-563-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | VALLEJO | CA |
| 2006-02-06 | 707-563-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | VALLEJO | CA |
| 2010-11-09 | 707-563-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | VALLEJO | CA |
| 2008-06-24 | 707-563-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | VALLEJO | CA |
| 2011-09-08 | 707-563-8XXX | 8000–8999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | VALLEJO | CA |
| 2012-10-31 | 707-563-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | VALLEJO | 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.