NumberResearchRecent thousands-block assignments
5 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 520
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 |
|---|---|---|---|---|---|---|---|
| 2022-10-05 | 520-772-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | SUPERIOR | AZ |
| 2022-10-04 | 520-657-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | HAYDEN | AZ |
| 2022-10-03 | 520-536-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | DOUGLAS | AZ |
| 2022-09-29 | 520-220-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | SIERRAVIST | AZ |
| 2022-09-29 | 520-646-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | NOGALES | AZ |
| 2022-09-29 | 520-646-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | NOGALES | AZ |
| 2022-09-29 | 520-646-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | NOGALES | AZ |
| 2022-09-26 | 520-520-0XXX | 0000–0999 | Assigned | ONVOY, LLC - AZ | 630E | NOGALES | AZ |
| 2022-09-26 | 520-520-1XXX | 1000–1999 | Assigned | ONVOY, LLC - AZ | 630E | NOGALES | AZ |
| 2022-09-26 | 520-520-2XXX | 2000–2999 | Assigned | ONVOY, LLC - AZ | 630E | NOGALES | AZ |
| 2022-09-26 | 520-520-3XXX | 3000–3999 | Assigned | ONVOY, LLC - AZ | 630E | NOGALES | AZ |
| 2022-09-26 | 520-520-4XXX | 4000–4999 | Assigned | ONVOY, LLC - AZ | 630E | NOGALES | AZ |
| 2022-09-26 | 520-520-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AZ | 630E | NOGALES | AZ |
| 2022-09-26 | 520-520-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AZ | 630E | NOGALES | AZ |
| 2022-09-26 | 520-520-7XXX | 7000–7999 | Assigned | ONVOY, LLC - AZ | 630E | NOGALES | AZ |
| 2022-09-26 | 520-520-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AZ | 630E | NOGALES | AZ |
| 2022-09-26 | 520-520-9XXX | 9000–9999 | Assigned | ONVOY, LLC - AZ | 630E | NOGALES | AZ |
| 2022-09-25 | 520-641-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | BENSON | AZ |
| 2022-09-25 | 520-929-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | WILLCOX | AZ |
| 2022-09-20 | 520-660-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2022-09-20 | 520-660-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2022-09-20 | 520-660-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2022-09-20 | 520-660-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2022-09-15 | 520-502-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AZ | 630E | SASABE | AZ |
| 2022-09-15 | 520-659-1XXX | 1000–1999 | Assigned | NUSO, LLC | 732J | NOGALES | AZ |
| 2022-09-06 | 520-226-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SIERRAVIST | AZ |
| 2022-09-06 | 520-750-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | TUCSON | AZ |
| 2022-08-29 | 520-503-6XXX | 6000–6999 | Assigned | COMMIO, LLC | 939H | WILLCOX | AZ |
| 2022-08-29 | 520-641-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | BENSON | AZ |
| 2022-08-25 | 520-654-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | SIERRAVIST | AZ |
| 2022-08-23 | 520-699-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | SIERRAVIST | AZ |
| 2022-08-23 | 520-699-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | SIERRAVIST | AZ |
| 2022-08-23 | 520-929-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | WILLCOX | AZ |
| 2022-08-18 | 520-994-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SASABE | AZ |
| 2022-08-10 | 520-646-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | NOGALES | AZ |
| 2022-08-10 | 520-649-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2022-08-10 | 520-649-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2022-08-10 | 520-649-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2022-08-10 | 520-649-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2022-08-10 | 520-649-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2022-08-10 | 520-649-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2022-08-10 | 520-649-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2022-08-10 | 520-702-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | DOUGLAS | AZ |
| 2022-08-10 | 520-710-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2022-08-10 | 520-710-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2022-08-10 | 520-710-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2022-08-10 | 520-710-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2022-08-10 | 520-710-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2022-08-09 | 520-634-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | CASAGRANDE | AZ |
| 2022-08-09 | 520-634-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | CASAGRANDE | AZ |
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.