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 559
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-08-22 | 559-872-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2025-08-22 | 559-872-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2025-08-22 | 559-872-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2025-08-22 | 559-872-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2025-08-22 | 559-872-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2025-08-22 | 559-968-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2025-05-30 | 559-767-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2025-05-30 | 559-938-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2025-05-30 | 559-938-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2025-05-30 | 559-938-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2025-04-10 | 559-938-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2025-04-10 | 559-938-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2025-04-10 | 559-938-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2024-08-29 | 559-915-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | MADERA | CA |
| 2024-08-20 | 559-913-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | VISALIA | CA |
| 2024-08-20 | 559-914-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2024-08-20 | 559-914-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2024-08-20 | 559-914-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2024-08-20 | 559-914-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2024-08-15 | 559-357-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | HANFORD | CA |
| 2024-06-21 | 559-505-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | MADERA | CA |
| 2024-06-21 | 559-505-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | MADERA | CA |
| 2024-06-21 | 559-613-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | MADERA | CA |
| 2024-06-21 | 559-764-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | MADERA | CA |
| 2024-06-21 | 559-764-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | MADERA | CA |
| 2024-06-21 | 559-764-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | MADERA | CA |
| 2024-06-21 | 559-764-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | MADERA | CA |
| 2024-02-21 | 559-806-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | VISALIA | CA |
| 2024-02-21 | 559-806-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | VISALIA | CA |
| 2024-02-21 | 559-806-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | VISALIA | CA |
| 2024-02-21 | 559-806-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | VISALIA | CA |
| 2024-01-19 | 559-874-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2024-01-19 | 559-882-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2024-01-19 | 559-882-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2024-01-19 | 559-882-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2024-01-19 | 559-882-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2023-12-01 | 559-874-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2023-12-01 | 559-874-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2023-12-01 | 559-874-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2023-12-01 | 559-874-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2023-12-01 | 559-874-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2023-08-23 | 559-818-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2023-08-23 | 559-872-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2023-08-10 | 559-818-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2023-06-15 | 559-767-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2023-01-19 | 559-818-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2023-01-19 | 559-818-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2023-01-19 | 559-818-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | CA |
| 2022-08-11 | 559-929-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | HANFORD | CA |
| 2022-05-26 | 559-649-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CLOVIS | 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.