NumberResearchThousands-blocks in 206-408
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 206-408 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 206 blocks
Most active assignees, all time — NPA 206
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 |
|---|---|---|---|---|---|---|---|
| 2014-08-29 | 206-408-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | VASHON | WA |
| 2007-02-06 | 206-408-1XXX | 1000–1999 | Assigned | ONVOY, LLC - WA | 483E | VASHON | WA |
| 2012-02-13 | 206-408-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WA | 6121 | VASHON | WA |
| 2017-09-12 | 206-408-3XXX | 3000–3999 | Assigned | ONVOY, LLC - WA | 483E | VASHON | WA |
| 2016-04-11 | 206-408-4XXX | 4000–4999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | VASHON | WA |
| 2013-11-26 | 206-408-5XXX | 5000–5999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | VASHON | WA |
| 2019-06-28 | 206-408-6XXX | 6000–6999 | Assigned | ONVOY, LLC - WA | 483E | VASHON | WA |
| 2005-03-09 | 206-408-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | VASHON | WA |
| — | 206-408-8XXX | 8000–8999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | VASHON | WA |
| — | 206-408-9XXX | 9000–9999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | VASHON | WA |
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.