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 |
|---|---|---|---|---|---|---|---|
| 2024-10-21 | 520-736-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CASAGRANDE | AZ |
| 2024-10-15 | 520-812-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-10-11 | 520-303-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2024-10-11 | 520-303-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2024-10-11 | 520-697-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2024-09-27 | 520-681-6XXX | 6000–6999 | Assigned | VALLEY CONNECTIONS, L.L.C. - AZ | 183D | NOGALES | AZ |
| 2024-09-13 | 520-277-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | WHITLOW | AZ |
| 2024-08-30 | 520-264-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | NOGALES | AZ |
| 2024-08-30 | 520-736-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2024-08-30 | 520-736-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2024-08-30 | 520-736-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2024-08-30 | 520-736-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2024-08-27 | 520-359-1XXX | 1000–1999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | TUCSON | AZ |
| 2024-08-27 | 520-606-3XXX | 3000–3999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | TUCSON | AZ |
| 2024-08-20 | 520-359-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2024-08-20 | 520-359-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2024-08-20 | 520-386-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | BENSON | AZ |
| 2024-08-20 | 520-658-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2024-08-20 | 520-658-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2024-08-09 | 520-359-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-08-09 | 520-359-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-08-09 | 520-606-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-08-09 | 520-606-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-08-09 | 520-658-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-08-09 | 520-658-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-08-09 | 520-658-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-08-02 | 520-517-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | SACATON | AZ |
| 2024-07-19 | 520-264-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | NOGALES | AZ |
| 2024-07-19 | 520-359-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | TUCSON | AZ |
| 2024-07-12 | 520-285-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | NOGALES | AZ |
| 2024-07-12 | 520-359-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | TUCSON | AZ |
| 2024-07-12 | 520-477-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | TUCSON | AZ |
| 2024-07-12 | 520-618-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-07-12 | 520-658-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-07-12 | 520-698-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | WILLCOX | AZ |
| 2024-07-08 | 520-679-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TOMBSTONE | AZ |
| 2024-06-17 | 520-737-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | SIERRAVIST | AZ |
| 2024-06-14 | 520-895-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | SIERRAVIST | AZ |
| 2024-06-13 | 520-736-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CASAGRANDE | AZ |
| 2024-05-31 | 520-210-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | TOMBSTONE | AZ |
| 2024-05-31 | 520-239-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2024-05-31 | 520-472-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | CASAGRANDE | AZ |
| 2024-05-31 | 520-527-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BENSON | AZ |
| 2024-05-31 | 520-607-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | CASAGRANDE | AZ |
| 2024-05-31 | 520-645-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | DOUGLAS | AZ |
| 2024-05-31 | 520-728-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2024-05-31 | 520-728-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2024-05-31 | 520-728-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2024-05-31 | 520-728-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2024-05-31 | 520-827-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SUPERIOR | 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.