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 |
|---|---|---|---|---|---|---|---|
| 2008-12-12 | 313-828-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2008-12-08 | 313-758-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | DETROITZN1 | MI |
| 2008-12-08 | 313-758-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | DETROITZN1 | MI |
| 2008-12-08 | 313-784-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | DETROITZN1 | MI |
| 2008-12-08 | 313-808-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2008-12-08 | 313-808-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2008-12-08 | 313-808-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2008-12-08 | 313-808-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2008-12-08 | 313-808-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | DETROITZN5 | MI |
| 2008-12-08 | 313-989-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | DETROITZN1 | MI |
| 2008-12-08 | 313-989-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | DETROITZN1 | MI |
| 2008-11-26 | 313-693-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN5 | MI |
| 2008-11-26 | 313-693-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN5 | MI |
| 2008-11-26 | 313-693-3XXX | 3000–3999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN5 | MI |
| 2008-11-26 | 313-693-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN5 | MI |
| 2008-11-26 | 313-693-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN5 | MI |
| 2008-11-07 | 313-270-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DETROITZN4 | MI |
| 2008-10-22 | 313-286-3XXX | 3000–3999 | Assigned | BHN IP ENABLED SERVICES, LLC | 045L | DETROITZN5 | MI |
| 2008-10-22 | 313-305-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | DETROITZN3 | MI |
| 2008-10-10 | 313-355-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | DETROITZN1 | MI |
| 2008-10-09 | 313-482-2XXX | 2000–2999 | Assigned | MICHIGAN BELL TEL CO | 9323 | DETROITZN1 | MI |
| 2008-10-09 | 313-482-3XXX | 3000–3999 | Assigned | MICHIGAN BELL TEL CO | 9323 | DETROITZN1 | MI |
| 2008-10-09 | 313-482-4XXX | 4000–4999 | Assigned | MICHIGAN BELL TEL CO | 9323 | DETROITZN1 | MI |
| 2008-10-03 | 313-427-0XXX | 0000–0999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN6 | MI |
| 2008-09-29 | 313-703-7XXX | 7000–7999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN5 | MI |
| 2008-08-22 | 313-423-9XXX | 9000–9999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | DETROITZN2 | MI |
| 2008-08-22 | 313-556-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN1 | MI |
| 2008-08-22 | 313-556-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | DETROITZN1 | MI |
| 2008-08-19 | 313-564-6XXX | 6000–6999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | DETROITZN3 | MI |
| 2008-08-07 | 313-473-1XXX | 1000–1999 | Assigned | MICHIGAN BELL TEL CO | 9323 | DETROITZN2 | MI |
| 2008-08-07 | 313-473-2XXX | 2000–2999 | Assigned | MICHIGAN BELL TEL CO | 9323 | DETROITZN2 | MI |
| 2008-08-07 | 313-473-3XXX | 3000–3999 | Assigned | MICHIGAN BELL TEL CO | 9323 | DETROITZN2 | MI |
| 2008-08-07 | 313-473-4XXX | 4000–4999 | Assigned | MICHIGAN BELL TEL CO | 9323 | DETROITZN2 | MI |
| 2008-08-07 | 313-473-5XXX | 5000–5999 | Assigned | MICHIGAN BELL TEL CO | 9323 | DETROITZN2 | MI |
| 2008-08-07 | 313-473-6XXX | 6000–6999 | Assigned | MICHIGAN BELL TEL CO | 9323 | DETROITZN2 | MI |
| 2008-07-15 | 313-731-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | DETROITZN3 | MI |
| 2008-07-15 | 313-918-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | DETROITZN1 | MI |
| 2008-07-07 | 313-202-2XXX | 2000–2999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | DETROITZN1 | MI |
| 2008-07-07 | 313-749-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | DETROITZN6 | MI |
| 2008-07-07 | 313-908-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | DETROITZN6 | MI |
| 2008-07-07 | 313-908-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | DETROITZN6 | MI |
| 2008-06-18 | 313-294-7XXX | 7000–7999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | DETROITZN6 | MI |
| 2008-06-16 | 313-693-1XXX | 1000–1999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | DETROITZN5 | MI |
| 2008-06-13 | 313-394-1XXX | 1000–1999 | Assigned | CLEAR RATE COMMUNICATIONS, LLC | 046L | DETROITZN1 | MI |
| 2008-06-12 | 313-294-5XXX | 5000–5999 | Assigned | CLEAR RATE COMMUNICATIONS, LLC | 046L | DETROITZN6 | MI |
| 2008-06-11 | 313-693-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | DETROITZN5 | MI |
| 2008-06-06 | 313-653-7XXX | 7000–7999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | DETROITZN4 | MI |
| 2008-06-05 | 313-270-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | DETROITZN4 | MI |
| 2008-05-20 | 313-429-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | DETROITZN6 | MI |
| 2008-05-14 | 313-459-0XXX | 0000–0999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN1 | 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.