NumberResearchThousands-blocks in 425-312
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 425-312 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 425 blocks
Most active assignees, all time — NPA 425
New assignments by month
Sep 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2009-09-17 | 425-312-0XXX | 0000–0999 | Assigned | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7173 | EVERETT | WA |
| 2010-06-17 | 425-312-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - WA | 006F | EVERETT | WA |
| 2010-10-26 | 425-312-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - WA | 006F | EVERETT | WA |
| 2010-10-26 | 425-312-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - WA | 006F | EVERETT | WA |
| 2010-11-05 | 425-312-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | EVERETT | WA |
| 2010-07-13 | 425-312-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | EVERETT | WA |
| 2011-07-11 | 425-312-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WA | 6121 | EVERETT | WA |
| 2010-05-07 | 425-312-7XXX | 7000–7999 | Assigned | ONVOY, LLC - WA | 483E | EVERETT | WA |
| 2011-08-03 | 425-312-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | EVERETT | WA |
| 2011-08-03 | 425-312-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | EVERETT | WA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.