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 657
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-11-13 | 657-331-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2025-11-13 | 657-623-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2025-11-13 | 657-835-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2025-11-13 | 657-835-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2025-09-24 | 657-820-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2025-09-24 | 657-820-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2025-09-24 | 657-820-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2025-09-24 | 657-820-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2025-03-21 | 657-714-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | BUENA PARK | CA |
| 2024-12-06 | 657-201-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-12-06 | 657-776-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-12-06 | 657-776-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-12-06 | 657-776-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-11-07 | 657-774-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | ORANGE | CA |
| 2024-10-21 | 657-773-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | HUNTITNBCH | CA |
| 2024-09-13 | 657-768-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-09-13 | 657-768-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-09-13 | 657-768-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-09-13 | 657-768-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-09-13 | 657-768-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-09-13 | 657-768-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-09-13 | 657-768-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-09-13 | 657-768-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-09-13 | 657-768-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-09-11 | 657-752-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | ORANGE | CA |
| 2024-09-11 | 657-765-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | WESTMINSTR | CA |
| 2024-08-28 | 657-759-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | BREA | CA |
| 2024-08-06 | 657-760-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | HUNTITNBCH | CA |
| 2024-08-05 | 657-895-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | HUNTITNBCH | CA |
| 2024-07-30 | 657-754-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | GARDEN GRV | CA |
| 2024-07-30 | 657-754-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | GARDEN GRV | CA |
| 2024-07-30 | 657-754-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | GARDEN GRV | CA |
| 2024-07-30 | 657-754-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | GARDEN GRV | CA |
| 2024-06-21 | 657-825-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-06-21 | 657-825-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-06-21 | 657-825-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-06-21 | 657-825-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-06-21 | 657-825-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-06-21 | 657-825-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-06-21 | 657-825-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-06-21 | 657-825-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-06-21 | 657-825-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-06-21 | 657-825-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2024-06-03 | 657-714-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | BUENA PARK | CA |
| 2024-06-03 | 657-714-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | BUENA PARK | CA |
| 2024-06-03 | 657-714-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BUENA PARK | CA |
| 2024-06-03 | 657-752-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | ORANGE | CA |
| 2024-06-03 | 657-752-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | ORANGE | CA |
| 2024-05-31 | 657-743-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CYPRESS | CA |
| 2024-05-22 | 657-751-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | FULLERTON | CA |
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.