NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
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 385
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-12-09 | 385-562-5XXX | 5000–5999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | BOUNTIFUL | UT |
| 2025-12-09 | 385-619-8XXX | 8000–8999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | OGDEN | UT |
| 2025-06-30 | 385-584-4XXX | 4000–4999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | SALT LAKE | UT |
| 2025-05-16 | 385-604-5XXX | 5000–5999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | PROVO | UT |
| 2025-04-07 | 385-562-3XXX | 3000–3999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | BOUNTIFUL | UT |
| 2025-04-07 | 385-562-6XXX | 6000–6999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | BOUNTIFUL | UT |
| 2024-07-25 | 385-316-0XXX | 0000–0999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | FARMINGTON | UT |
| 2024-07-23 | 385-587-0XXX | 0000–0999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | SPNSFKCNYN | UT |
| 2024-06-27 | 385-584-0XXX | 0000–0999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | SALT LAKE | UT |
| 2024-06-27 | 385-584-1XXX | 1000–1999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | SALT LAKE | UT |
| 2023-08-02 | 385-541-0XXX | 0000–0999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | SALT LAKE | UT |
| 2023-08-02 | 385-541-1XXX | 1000–1999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | SALT LAKE | UT |
| 2023-07-10 | 385-486-7XXX | 7000–7999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | BOUNTIFUL | UT |
| 2022-08-02 | 385-481-4XXX | 4000–4999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | ALTA | UT |
| 2022-08-02 | 385-688-0XXX | 0000–0999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | GOSHEN | UT |
| 2021-12-17 | 385-452-5XXX | 5000–5999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | PROVO | UT |
| 2021-12-17 | 385-453-9XXX | 9000–9999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | OGDEN | UT |
| 2021-12-10 | 385-622-9XXX | 9000–9999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | SALT LAKE | UT |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.