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 |
|---|---|---|---|---|---|---|---|
| 2025-10-28 | 520-764-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-10-28 | 520-764-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-10-28 | 520-764-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-10-28 | 520-764-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-10-22 | 520-785-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | TUCSON | AZ |
| 2025-10-10 | 520-763-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CASAGRANDE | AZ |
| 2025-10-10 | 520-763-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CASAGRANDE | AZ |
| 2025-10-03 | 520-735-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SIERRAVIST | AZ |
| 2025-10-03 | 520-737-4XXX | 4000–4999 | Assigned | HD CARRIER LLC | 321J | SIERRAVIST | AZ |
| 2025-10-03 | 520-737-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | SIERRAVIST | AZ |
| 2025-10-03 | 520-737-7XXX | 7000–7999 | Assigned | HD CARRIER LLC | 321J | SIERRAVIST | AZ |
| 2025-10-03 | 520-737-8XXX | 8000–8999 | Assigned | HD CARRIER LLC | 321J | SIERRAVIST | AZ |
| 2025-10-03 | 520-737-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | SIERRAVIST | AZ |
| 2025-10-01 | 520-802-0XXX | 0000–0999 | Assigned | LEAP TELECOM, LLC | 616J | TUCSON | AZ |
| 2025-09-22 | 520-801-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2025-09-22 | 520-801-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2025-09-22 | 520-801-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2025-09-22 | 520-801-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2025-09-22 | 520-801-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2025-09-16 | 520-763-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-09-16 | 520-763-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-09-16 | 520-763-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-09-16 | 520-763-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-09-15 | 520-754-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | SACATON | AZ |
| 2025-09-12 | 520-801-2XXX | 2000–2999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | TUCSON | AZ |
| 2025-09-12 | 520-841-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | NOGALES | AZ |
| 2025-09-08 | 520-443-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2025-09-08 | 520-443-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2025-09-08 | 520-443-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2025-09-08 | 520-443-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2025-09-08 | 520-460-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2025-09-08 | 520-460-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2025-09-08 | 520-512-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2025-09-08 | 520-512-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2025-09-08 | 520-513-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2025-09-08 | 520-513-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2025-09-08 | 520-513-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2025-09-08 | 520-513-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2025-09-08 | 520-513-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2025-09-08 | 520-513-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2025-09-08 | 520-513-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2025-09-08 | 520-570-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2025-09-08 | 520-570-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2025-09-08 | 520-570-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2025-09-08 | 520-570-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2025-09-08 | 520-571-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TUCSON | AZ |
| 2025-08-22 | 520-521-5XXX | 5000–5999 | Assigned | HD CARRIER LLC | 321J | SAN MANUEL | AZ |
| 2025-08-22 | 520-679-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | TOMBSTONE | AZ |
| 2025-08-22 | 520-679-7XXX | 7000–7999 | Assigned | HD CARRIER LLC | 321J | TOMBSTONE | AZ |
| 2025-08-22 | 520-680-7XXX | 7000–7999 | Assigned | HD CARRIER LLC | 321J | BISBEE | 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.