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 |
|---|---|---|---|---|---|---|---|
| 2025-01-31 | 520-753-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2025-01-15 | 520-375-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | NOGALES | AZ |
| 2025-01-15 | 520-397-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | NOGALES | AZ |
| 2025-01-15 | 520-681-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | NOGALES | AZ |
| 2025-01-15 | 520-739-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2025-01-15 | 520-812-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2025-01-08 | 520-752-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | CASAGRANDE | AZ |
| 2025-01-08 | 520-752-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | CASAGRANDE | AZ |
| 2025-01-08 | 520-752-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | CASAGRANDE | AZ |
| 2025-01-08 | 520-752-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | CASAGRANDE | AZ |
| 2025-01-08 | 520-752-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | CASAGRANDE | AZ |
| 2024-12-31 | 520-464-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CASAGRANDE | AZ |
| 2024-12-31 | 520-464-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CASAGRANDE | AZ |
| 2024-12-31 | 520-473-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SIERRAVIST | AZ |
| 2024-12-31 | 520-509-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CASAGRANDE | AZ |
| 2024-12-23 | 520-303-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2024-12-23 | 520-525-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BISBEE | AZ |
| 2024-12-23 | 520-675-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2024-12-23 | 520-739-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2024-12-23 | 520-739-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2024-12-23 | 520-739-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2024-12-23 | 520-739-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2024-12-23 | 520-739-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2024-12-23 | 520-739-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2024-12-06 | 520-517-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | SACATON | AZ |
| 2024-12-06 | 520-517-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | SACATON | AZ |
| 2024-11-24 | 520-509-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | CASAGRANDE | AZ |
| 2024-11-14 | 520-681-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | NOGALES | AZ |
| 2024-11-14 | 520-736-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CASAGRANDE | AZ |
| 2024-11-14 | 520-736-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CASAGRANDE | AZ |
| 2024-11-14 | 520-736-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CASAGRANDE | AZ |
| 2024-11-14 | 520-739-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2024-11-14 | 520-739-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2024-11-14 | 520-739-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2024-11-12 | 520-503-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | WILLCOX | AZ |
| 2024-11-12 | 520-698-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | WILLCOX | AZ |
| 2024-11-12 | 520-698-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | WILLCOX | AZ |
| 2024-11-12 | 520-698-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | WILLCOX | AZ |
| 2024-11-01 | 520-641-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | BENSON | AZ |
| 2024-10-22 | 520-738-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-10-22 | 520-738-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-10-22 | 520-738-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-10-22 | 520-738-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-10-22 | 520-738-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-10-22 | 520-738-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-10-22 | 520-738-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-10-22 | 520-738-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-10-22 | 520-738-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-10-22 | 520-738-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-10-22 | 520-851-0XXX | 0000–0999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | 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.