NumberResearchThousands-blocks in 425-406
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 425-406 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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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2013-10-18 | 425-406-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | KIRKLAND | WA |
| — | 425-406-1XXX | 1000–1999 | Reserved | ONVOY, LLC - WA | 483E | KIRKLAND | WA |
| 2009-09-22 | 425-406-2XXX | 2000–2999 | Assigned | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7173 | KIRKLAND | WA |
| — | 425-406-3XXX | 3000–3999 | Reserved | ONVOY, LLC - WA | 483E | KIRKLAND | WA |
| — | 425-406-4XXX | 4000–4999 | Reserved | ONVOY, LLC - WA | 483E | KIRKLAND | WA |
| 2013-11-27 | 425-406-5XXX | 5000–5999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | KIRKLAND | WA |
| 2010-03-02 | 425-406-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | KIRKLAND | WA |
| 2010-07-16 | 425-406-7XXX | 7000–7999 | Assigned | ONVOY, LLC - WA | 483E | KIRKLAND | WA |
| 2012-09-10 | 425-406-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | KIRKLAND | WA |
| 2015-05-11 | 425-406-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | KIRKLAND | 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.