NumberResearchThousands-blocks in 628-253
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 628-253 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 628 blocks
Most active assignees, all time — NPA 628
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-07-26 | 628-253-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SAN RAFAEL | CA |
| 2016-08-29 | 628-253-1XXX | 1000–1999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | SAN RAFAEL | CA |
| 2016-09-15 | 628-253-2XXX | 2000–2999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | SAN RAFAEL | CA |
| 2016-12-08 | 628-253-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SAN RAFAEL | CA |
| 2017-05-19 | 628-253-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | SAN RAFAEL | CA |
| 2016-08-17 | 628-253-5XXX | 5000–5999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SAN RAFAEL | CA |
| 2017-05-05 | 628-253-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SAN RAFAEL | CA |
| 2017-08-14 | 628-253-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SAN RAFAEL | CA |
| 2017-05-05 | 628-253-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SAN RAFAEL | CA |
| 2026-03-11 | 628-253-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | SAN RAFAEL | 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.