NumberResearchThousands-blocks in 248-850
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 248-850 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 248 blocks
Most active assignees, all time — NPA 248
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 |
|---|---|---|---|---|---|---|---|
| 2007-01-16 | 248-850-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | ROYAL OAK | MI |
| 2008-05-05 | 248-850-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | ROYAL OAK | MI |
| 2008-05-05 | 248-850-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | ROYAL OAK | MI |
| 2009-01-30 | 248-850-3XXX | 3000–3999 | Assigned | ONVOY, LLCV - MI | 543C | ROYAL OAK | MI |
| 2026-06-03 | 248-850-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROYAL OAK | MI |
| 2008-09-29 | 248-850-5XXX | 5000–5999 | Assigned | ONVOY, LLCV - MI | 543C | ROYAL OAK | MI |
| 2007-03-22 | 248-850-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | ROYAL OAK | MI |
| 2006-11-15 | 248-850-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | ROYAL OAK | MI |
| 2006-11-15 | 248-850-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | ROYAL OAK | MI |
| 2006-03-03 | 248-850-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROYAL OAK | MI |
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.