NumberResearchRecent thousands-block assignments
15 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, last 30 days — NPA 341
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2019-08-21 | 341-333-5XXX | 5000–5999 | Assigned | FRACTEL, LLC | 965H | OKLD BKLY | CA |
| 2019-08-15 | 341-999-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | RICHMOND | CA |
| 2019-08-07 | 341-999-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | RICHMOND | CA |
| 2019-08-07 | 341-999-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | RICHMOND | CA |
| 2019-08-07 | 341-999-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | RICHMOND | CA |
| 2019-08-07 | 341-999-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | RICHMOND | CA |
| 2019-08-05 | 341-777-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2019-08-05 | 341-777-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2019-07-31 | 341-999-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | RICHMOND | CA |
| 2019-07-22 | 341-999-8XXX | 8000–8999 | Assigned | FRACTEL, LLC | 965H | RICHMOND | CA |
| 2019-07-22 | 341-999-9XXX | 9000–9999 | Assigned | FRACTEL, LLC | 965H | RICHMOND | CA |
| 2019-07-12 | 341-888-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRNK MAIN | CA |
| 2019-06-11 | 341-777-1XXX | 1000–1999 | Assigned | HD CARRIER LLC | 321J | HAYWARD | CA |
| 2019-06-10 | 341-888-8XXX | 8000–8999 | Assigned | WIDE VOICE, LLC - CA | 252F | FRNK MAIN | CA |
| 2019-05-31 | 341-777-7XXX | 7000–7999 | Assigned | WIDE VOICE, LLC - CA | 252F | HAYWARD | 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.