NumberResearchRecent thousands-block assignments
6 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, last 30 days — NPA 313
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 |
|---|---|---|---|---|---|---|---|
| 2006-07-06 | 313-740-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2006-07-06 | 313-740-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2006-07-06 | 313-740-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2006-07-06 | 313-740-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2006-07-06 | 313-740-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2006-07-06 | 313-740-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2006-07-06 | 313-740-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2006-07-06 | 313-740-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2006-07-06 | 313-740-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2006-06-28 | 313-659-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | DETROITZN4 | MI |
| 2006-06-22 | 313-424-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | DETROITZN1 | MI |
| 2006-06-22 | 313-424-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | DETROITZN1 | MI |
| 2006-06-22 | 313-424-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | DETROITZN1 | MI |
| 2006-06-22 | 313-471-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | DETROITZN1 | MI |
| 2006-06-22 | 313-471-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | DETROITZN1 | MI |
| 2006-06-22 | 313-651-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | DETROITZN4 | MI |
| 2006-06-22 | 313-721-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | DETROITZN6 | MI |
| 2006-06-22 | 313-733-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | DETROITZN3 | MI |
| 2006-06-22 | 313-736-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | DETROITZN4 | MI |
| 2006-06-22 | 313-736-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | DETROITZN4 | MI |
| 2006-06-22 | 313-739-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | DETROITZN4 | MI |
| 2006-06-22 | 313-739-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | DETROITZN4 | MI |
| 2006-06-22 | 313-778-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2006-06-22 | 313-778-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2006-06-22 | 313-778-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2006-06-22 | 313-778-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2006-06-22 | 313-826-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | DETROITZN3 | MI |
| 2006-06-22 | 313-878-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2006-06-22 | 313-878-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2006-06-22 | 313-878-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2006-06-22 | 313-948-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2006-06-22 | 313-948-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2006-06-22 | 313-948-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2006-06-22 | 313-957-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | DETROITZN3 | MI |
| 2006-06-22 | 313-957-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | DETROITZN3 | MI |
| 2006-06-22 | 313-957-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | DETROITZN3 | MI |
| 2006-06-08 | 313-736-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DETROITZN4 | MI |
| 2006-06-08 | 313-926-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DETROITZN2 | MI |
| 2006-06-06 | 313-344-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN2 | MI |
| 2006-06-06 | 313-551-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | DETROITZN6 | MI |
| 2006-06-06 | 313-551-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | DETROITZN6 | MI |
| 2006-06-06 | 313-551-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | DETROITZN6 | MI |
| 2006-06-06 | 313-733-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN3 | MI |
| 2006-06-05 | 313-429-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | DETROITZN6 | MI |
| 2006-06-05 | 313-429-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | DETROITZN6 | MI |
| 2006-05-23 | 313-429-3XXX | 3000–3999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | DETROITZN6 | MI |
| 2006-05-15 | 313-483-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | DETROITZN1 | MI |
| 2006-05-15 | 313-483-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | DETROITZN1 | MI |
| 2006-05-04 | 313-879-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | DETROITZN1 | MI |
| 2006-04-25 | 313-344-4XXX | 4000–4999 | Assigned | PAETEC ITEL, LLC | 829J | DETROITZN2 | 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.