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 515
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-07-28 | 515-403-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2025-12-05 | 515-403-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2025-12-05 | 515-403-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2025-12-05 | 515-403-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2025-11-25 | 515-983-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2025-11-25 | 515-983-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2025-11-25 | 515-983-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2025-11-25 | 515-983-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2025-10-17 | 515-983-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2025-10-17 | 515-983-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2025-08-28 | 515-983-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2025-08-28 | 515-983-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2025-06-25 | 515-694-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2025-06-25 | 515-694-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2025-03-06 | 515-694-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2025-03-06 | 515-694-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2025-01-02 | 515-694-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2025-01-02 | 515-694-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2024-09-20 | 515-694-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2024-09-10 | 515-694-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2024-08-13 | 515-565-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | LIVERMORE | IA |
| 2024-08-13 | 515-691-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | NEVADA | IA |
| 2024-07-31 | 515-364-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | GOLDFIELD | IA |
| 2024-07-18 | 515-796-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | JEFFERSON | IA |
| 2024-07-17 | 515-456-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | BANCROFT | IA |
| 2024-07-17 | 515-477-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | SWEA CITY | IA |
| 2024-07-17 | 515-659-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | HUXLEY | IA |
| 2024-07-17 | 515-714-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | MADRID | IA |
| 2024-07-17 | 515-775-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | GRAND JCT | IA |
| 2024-04-12 | 515-425-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2024-04-12 | 515-425-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2024-04-12 | 515-425-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2024-04-12 | 515-425-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2024-04-12 | 515-916-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2024-04-12 | 515-916-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2023-12-05 | 515-561-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | DES MOINES | IA |
| 2023-12-05 | 515-561-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | DES MOINES | IA |
| 2023-12-05 | 515-561-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | DES MOINES | IA |
| 2023-12-05 | 515-561-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | DES MOINES | IA |
| 2023-12-05 | 515-561-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | DES MOINES | IA |
| 2023-12-05 | 515-561-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | DES MOINES | IA |
| 2023-12-05 | 515-672-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | DES MOINES | IA |
| 2023-08-21 | 515-567-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2023-08-21 | 515-567-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2023-08-21 | 515-567-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2022-11-22 | 515-916-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2022-11-22 | 515-916-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2022-11-22 | 515-916-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2022-11-22 | 515-916-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2022-10-13 | 515-370-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | JEFFERSON | IA |
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.