NumberResearchRecent thousands-block assignments
5 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 |
|---|---|---|---|---|---|---|---|
| 2022-12-15 | 520-540-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | TUCSON | AZ |
| 2022-12-15 | 520-540-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | TUCSON | AZ |
| 2022-12-15 | 520-606-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | TUCSON | AZ |
| 2022-12-05 | 520-301-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2022-12-05 | 520-641-4XXX | 4000–4999 | Assigned | ONVOY, LLC - AZ | 630E | BENSON | AZ |
| 2022-12-05 | 520-710-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2022-12-05 | 520-710-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2022-12-05 | 520-710-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2022-12-05 | 520-710-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2022-12-05 | 520-710-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2022-11-29 | 520-659-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | NOGALES | AZ |
| 2022-11-29 | 520-659-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | NOGALES | AZ |
| 2022-11-29 | 520-659-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | NOGALES | AZ |
| 2022-11-22 | 520-654-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AZ | 630E | SIERRAVIST | AZ |
| 2022-11-22 | 520-657-7XXX | 7000–7999 | Assigned | PEERLESS NETWORK OF ARIZONA, LLC - AZ | 579F | HAYDEN | AZ |
| 2022-11-16 | 520-654-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | SIERRAVIST | AZ |
| 2022-11-16 | 520-965-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | TUCSON | AZ |
| 2022-11-08 | 520-608-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | SAN MANUEL | AZ |
| 2022-11-04 | 520-557-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | CASAGRANDE | AZ |
| 2022-11-04 | 520-557-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | CASAGRANDE | AZ |
| 2022-11-04 | 520-557-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | CASAGRANDE | AZ |
| 2022-11-03 | 520-659-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | NOGALES | AZ |
| 2022-11-03 | 520-659-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | NOGALES | AZ |
| 2022-11-03 | 520-659-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | NOGALES | AZ |
| 2022-11-01 | 520-649-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2022-11-01 | 520-653-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2022-11-01 | 520-653-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2022-11-01 | 520-653-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2022-10-31 | 520-660-3XXX | 3000–3999 | Assigned | ONVOY, LLC - AZ | 630E | CASAGRANDE | AZ |
| 2022-10-31 | 520-660-4XXX | 4000–4999 | Assigned | ONVOY, LLC - AZ | 630E | CASAGRANDE | AZ |
| 2022-10-31 | 520-660-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AZ | 630E | CASAGRANDE | AZ |
| 2022-10-27 | 520-656-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | WILLCOX | AZ |
| 2022-10-27 | 520-656-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | WILLCOX | AZ |
| 2022-10-27 | 520-656-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | WILLCOX | AZ |
| 2022-10-27 | 520-656-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | WILLCOX | AZ |
| 2022-10-27 | 520-656-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | WILLCOX | AZ |
| 2022-10-27 | 520-656-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | WILLCOX | AZ |
| 2022-10-26 | 520-517-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | SACATON | AZ |
| 2022-10-26 | 520-649-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | TUCSON | AZ |
| 2022-10-19 | 520-657-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | HAYDEN | AZ |
| 2022-10-14 | 520-646-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | NOGALES | AZ |
| 2022-10-14 | 520-646-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | NOGALES | AZ |
| 2022-10-13 | 520-606-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | TUCSON | AZ |
| 2022-10-13 | 520-606-6XXX | 6000–6999 | Assigned | COMMIO, LLC | 939H | TUCSON | AZ |
| 2022-10-13 | 520-606-7XXX | 7000–7999 | Assigned | COMMIO, LLC | 939H | TUCSON | AZ |
| 2022-10-13 | 520-606-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | TUCSON | AZ |
| 2022-10-13 | 520-657-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | HAYDEN | AZ |
| 2022-10-11 | 520-521-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | SAN MANUEL | AZ |
| 2022-10-11 | 520-652-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | WHITLOW | AZ |
| 2022-10-11 | 520-657-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | HAYDEN | AZ |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.