NumberResearchRecent thousands-block assignments
0 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, all time — NPA 520
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-01-09 | 520-764-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2026-01-09 | 520-765-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-10-28 | 520-763-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-10-28 | 520-764-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 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 |
| 2025-09-16 | 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 |
| 2025-07-11 | 520-763-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-07-11 | 520-763-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-07-11 | 520-763-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-06-02 | 520-757-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-06-02 | 520-757-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-06-02 | 520-757-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-06-02 | 520-757-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-03-25 | 520-757-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-03-25 | 520-757-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-03-25 | 520-757-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-03-10 | 520-752-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | 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 |
| 2024-07-12 | 520-285-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | NOGALES | 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 |
| 2024-02-19 | 520-728-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2024-02-19 | 520-728-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2024-02-16 | 520-598-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2024-02-16 | 520-701-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2024-02-16 | 520-701-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2024-02-16 | 520-701-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2023-11-09 | 520-683-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2023-11-09 | 520-683-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2023-11-09 | 520-701-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2023-08-10 | 520-660-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2023-08-10 | 520-660-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2023-05-31 | 520-435-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | WILLCOX | AZ |
| 2023-01-05 | 520-557-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2023-01-05 | 520-557-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2023-01-05 | 520-557-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2022-09-29 | 520-220-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | SIERRAVIST | AZ |
| 2022-09-29 | 520-646-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | NOGALES | AZ |
| 2022-09-29 | 520-646-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | NOGALES | 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.