NumberResearchThousands-blocks in 208-577
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 208-577 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 208 blocks
Most active assignees, all time — NPA 208
New assignments by month
Sep 2026
Aug 2026
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Jun 2026
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Apr 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2008-01-07 | 208-577-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | BOISE | ID |
| 2009-09-11 | 208-577-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ID | 6565 | BOISE | ID |
| 2009-07-16 | 208-577-2XXX | 2000–2999 | Assigned | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7865 | BOISE | ID |
| 2004-01-12 | 208-577-3XXX | 3000–3999 | Assigned | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7865 | BOISE | ID |
| 2004-01-12 | 208-577-4XXX | 4000–4999 | Assigned | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7865 | BOISE | ID |
| 2007-11-15 | 208-577-5XXX | 5000–5999 | Assigned | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7865 | BOISE | ID |
| 2007-09-25 | 208-577-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - ID | 7558 | BOISE | ID |
| 2004-03-29 | 208-577-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | BOISE | ID |
| 2004-03-29 | 208-577-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | BOISE | ID |
| 2025-11-06 | 208-577-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | BOISE | ID |
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.