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 425
New assignments by month
Sep 2026
Aug 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-01-08 | 425-592-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-12-05 | 425-575-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-12-05 | 425-575-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-12-05 | 425-575-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-12-05 | 425-575-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-10-23 | 425-574-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-10-23 | 425-574-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-10-23 | 425-574-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-10-23 | 425-574-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-10-23 | 425-574-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-10-23 | 425-574-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-10-23 | 425-575-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-10-23 | 425-575-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-09-19 | 425-568-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-09-19 | 425-568-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-09-19 | 425-568-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-09-19 | 425-568-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-09-19 | 425-574-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-09-19 | 425-574-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-07-14 | 425-568-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-07-14 | 425-568-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-07-14 | 425-568-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-07-14 | 425-568-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-07-14 | 425-568-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2024-10-11 | 425-325-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BOTHELL | WA |
| 2024-09-13 | 425-472-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2024-09-13 | 425-472-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2024-09-13 | 425-472-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2024-09-13 | 425-472-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2024-09-13 | 425-516-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2024-09-13 | 425-520-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2024-09-13 | 425-536-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2024-09-13 | 425-536-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2024-08-30 | 425-570-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | HALLS LAKE | WA |
| 2024-08-30 | 425-967-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | HALLS LAKE | WA |
| 2024-08-29 | 425-331-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | ISSAQUAH | WA |
| 2024-08-29 | 425-494-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | ISSAQUAH | WA |
| 2024-06-10 | 425-832-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | ISSAQUAH | WA |
| 2024-06-10 | 425-832-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | ISSAQUAH | WA |
| 2024-05-31 | 425-561-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | HALLS LAKE | WA |
| 2024-05-31 | 425-561-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | HALLS LAKE | WA |
| 2024-03-29 | 425-561-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | HALLS LAKE | WA |
| 2024-03-08 | 425-479-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | RENTON | WA |
| 2024-03-08 | 425-479-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | RENTON | WA |
| 2024-03-08 | 425-479-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | RENTON | WA |
| 2024-03-01 | 425-340-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | ISSAQUAH | WA |
| 2024-01-25 | 425-550-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | HALLS LAKE | WA |
| 2024-01-25 | 425-550-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | HALLS LAKE | WA |
| 2023-10-23 | 425-473-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | RENTON | WA |
| 2023-10-23 | 425-547-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | RENTON | WA |
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.