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 |
|---|---|---|---|---|---|---|---|
| 2023-06-08 | 520-667-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2023-06-08 | 520-667-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2023-06-08 | 520-679-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TOMBSTONE | AZ |
| 2023-05-31 | 520-435-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | WILLCOX | AZ |
| 2023-05-31 | 520-667-2XXX | 2000–2999 | Assigned | ONVOY, LLC - AZ | 630E | TUCSON | AZ |
| 2023-05-25 | 520-677-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CASAGRANDE | AZ |
| 2023-05-19 | 520-641-3XXX | 3000–3999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | BENSON | AZ |
| 2023-05-19 | 520-652-5XXX | 5000–5999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | WHITLOW | AZ |
| 2023-05-11 | 520-656-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | WILLCOX | AZ |
| 2023-05-11 | 520-656-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | WILLCOX | AZ |
| 2023-05-11 | 520-929-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | WILLCOX | AZ |
| 2023-04-19 | 520-654-6XXX | 6000–6999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | SIERRAVIST | AZ |
| 2023-04-18 | 520-677-9XXX | 9000–9999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | CASAGRANDE | AZ |
| 2023-04-17 | 520-755-1XXX | 1000–1999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | LONE BUTTE | AZ |
| 2023-04-14 | 520-675-9XXX | 9000–9999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | TUCSON | AZ |
| 2023-04-06 | 520-659-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | NOGALES | AZ |
| 2023-04-06 | 520-659-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | NOGALES | AZ |
| 2023-03-16 | 520-517-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | SACATON | AZ |
| 2023-03-16 | 520-608-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF ARIZONA, LLC - AZ | 579F | SAN MANUEL | AZ |
| 2023-03-15 | 520-540-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2023-03-15 | 520-540-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2023-03-15 | 520-540-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2023-03-15 | 520-540-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2023-03-15 | 520-540-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2023-03-15 | 520-540-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2023-03-15 | 520-649-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2023-03-09 | 520-669-0XXX | 0000–0999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-669-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-669-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-669-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-669-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-669-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-669-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-669-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-669-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-669-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-671-0XXX | 0000–0999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-671-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-671-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-671-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-671-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-671-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-671-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-671-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-671-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-671-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-672-0XXX | 0000–0999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-672-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-672-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2023-03-09 | 520-672-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | 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.