NumberResearchRecent thousands-block assignments
11 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 251
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 |
|---|---|---|---|---|---|---|---|
| 2015-07-23 | 251-239-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AL | 5255 | BAYMINETTE | AL |
| 2015-07-23 | 251-405-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AL | 5255 | MOBILE | AL |
| 2015-07-15 | 251-255-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7221 | EVERGREEN | AL |
| 2015-07-06 | 251-228-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | FOLEY | AL |
| 2015-07-06 | 251-444-2XXX | 2000–2999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-07-06 | 251-444-3XXX | 3000–3999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-07-06 | 251-444-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-07-06 | 251-444-9XXX | 9000–9999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-07-06 | 251-888-3XXX | 3000–3999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-07-06 | 251-888-4XXX | 4000–4999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-07-06 | 251-888-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-07-06 | 251-888-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-07-06 | 251-888-9XXX | 9000–9999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-07-06 | 251-999-0XXX | 0000–0999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-07-06 | 251-999-1XXX | 1000–1999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-07-06 | 251-999-2XXX | 2000–2999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-07-06 | 251-999-3XXX | 3000–3999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-07-06 | 251-999-4XXX | 4000–4999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-07-06 | 251-999-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-07-06 | 251-999-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-07-06 | 251-999-7XXX | 7000–7999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-07-06 | 251-999-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-06-23 | 251-415-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AL | 5255 | MOBILE | AL |
| 2015-06-10 | 251-597-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL | 6804 | FOLEY | AL |
| 2015-06-09 | 251-273-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - AL | 072F | CITRONELLE | AL |
| 2015-06-09 | 251-274-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - AL | 072F | MCINTOSH | AL |
| 2015-06-03 | 251-414-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | MOBILE | AL |
| 2015-05-28 | 251-238-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - AL | 072F | BREWTON | AL |
| 2015-05-28 | 251-265-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - AL | 072F | MT VERNON | AL |
| 2015-05-14 | 251-444-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-05-14 | 251-444-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-05-14 | 251-444-7XXX | 7000–7999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-04-30 | 251-345-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MOBILE | AL |
| 2015-04-23 | 251-340-2XXX | 2000–2999 | Assigned | MCC TELEPHONY OF THE SOUTH, LLC - AL | 773F | MOBILE | AL |
| 2015-04-22 | 251-444-1XXX | 1000–1999 | Assigned | TELEPAK NETWORKS, INC. - AL | 947G | MOBILE | AL |
| 2015-04-07 | 251-262-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - AL | 072F | JACKSON | AL |
| 2015-04-07 | 251-744-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - AL | 072F | JACKSON | AL |
| 2015-04-03 | 251-304-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-02-24 | 251-999-9XXX | 9000–9999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-02-20 | 251-262-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - AL | 072F | JACKSON | AL |
| 2015-02-18 | 251-444-0XXX | 0000–0999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-02-18 | 251-444-4XXX | 4000–4999 | Assigned | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2015-02-13 | 251-230-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - AL | 072F | EVERGREEN | AL |
| 2015-02-13 | 251-230-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - AL | 072F | EVERGREEN | AL |
| 2015-02-13 | 251-230-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - AL | 072F | EVERGREEN | AL |
| 2015-02-13 | 251-260-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - AL | 072F | MELVIN | AL |
| 2015-02-13 | 251-270-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - AL | 072F | FAIRHOPE | AL |
| 2015-02-13 | 251-270-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - AL | 072F | FAIRHOPE | AL |
| 2015-02-13 | 251-647-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - AL | 072F | FLOMATON | AL |
| 2015-02-13 | 251-655-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AL | 8271 | ATMORE | AL |
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.