NumberResearchThousands-blocks in 508-617
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 508-617 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 508 blocks
Most active assignees, all time — NPA 508
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 508-617-0XXX | 0000–0999 | Reserved | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | FALL RIVER | MA |
| 2006-05-19 | 508-617-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | FALL RIVER | MA |
| 2005-11-16 | 508-617-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FALL RIVER | MA |
| 2006-12-21 | 508-617-3XXX | 3000–3999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | FALL RIVER | MA |
| 2007-01-22 | 508-617-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | FALL RIVER | MA |
| 2006-08-08 | 508-617-5XXX | 5000–5999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | FALL RIVER | MA |
| 2008-01-08 | 508-617-6XXX | 6000–6999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | FALL RIVER | MA |
| 2006-11-07 | 508-617-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | FALL RIVER | MA |
| 2006-06-13 | 508-617-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | FALL RIVER | MA |
| 2006-06-13 | 508-617-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | FALL RIVER | MA |
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.