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 857
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-11-08 | 857-427-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BOSTON | MA |
| 2024-11-08 | 857-428-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | EVERETT | MA |
| 2024-11-08 | 857-428-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | EVERETT | MA |
| 2024-11-08 | 857-428-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | EVERETT | MA |
| 2024-11-08 | 857-429-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ROXBURY | MA |
| 2024-11-08 | 857-429-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ROXBURY | MA |
| 2024-11-08 | 857-429-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ROXBURY | MA |
| 2024-11-08 | 857-466-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HYDE PARK | MA |
| 2024-11-08 | 857-466-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HYDE PARK | MA |
| 2024-11-08 | 857-475-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHELSEA | MA |
| 2024-11-08 | 857-475-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHELSEA | MA |
| 2024-11-08 | 857-475-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHELSEA | MA |
| 2024-11-08 | 857-497-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHARLESTN | MA |
| 2024-11-08 | 857-497-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHARLESTN | MA |
| 2024-11-08 | 857-497-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHARLESTN | MA |
| 2024-11-07 | 857-299-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BELMONT | MA |
| 2024-11-07 | 857-341-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BELMONT | MA |
| 2024-11-07 | 857-367-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WATERTOWN | MA |
| 2024-11-07 | 857-380-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | EASTBOSTON | MA |
| 2024-11-07 | 857-605-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BRIGHTON | MA |
| 2024-11-07 | 857-605-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BRIGHTON | MA |
| 2024-11-07 | 857-737-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WATERTOWN | MA |
| 2024-11-07 | 857-822-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SOMERVILLE | MA |
| 2024-11-07 | 857-822-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SOMERVILLE | MA |
| 2024-11-07 | 857-822-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SOMERVILLE | MA |
| 2024-11-07 | 857-833-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WINTHROP | MA |
| 2024-11-07 | 857-833-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WINTHROP | MA |
| 2024-11-07 | 857-833-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WINTHROP | MA |
| 2024-11-07 | 857-857-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | NEWTON | MA |
| 2024-11-07 | 857-857-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | NEWTON | MA |
| 2024-11-07 | 857-857-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | NEWTON | MA |
| 2024-11-07 | 857-877-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BRIGHTON | MA |
| 2024-08-13 | 857-244-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BOSTON | MA |
| 2024-04-22 | 857-467-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SOMERVILLE | MA |
| 2024-04-22 | 857-467-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SOMERVILLE | MA |
| 2022-02-22 | 857-392-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JAMAICA PL | MA |
| 2022-02-22 | 857-392-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JAMAICA PL | MA |
| 2022-02-22 | 857-693-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ROXBURY | MA |
| 2022-02-18 | 857-688-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DORCHESTER | MA |
| 2022-02-18 | 857-688-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DORCHESTER | MA |
| 2022-02-15 | 857-788-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BOSTON | MA |
| 2022-02-15 | 857-788-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BOSTON | MA |
| 2022-01-28 | 857-799-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CAMBRIDGE | MA |
| 2022-01-14 | 857-384-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BRIGHTON | MA |
| 2022-01-14 | 857-384-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BRIGHTON | MA |
| 2022-01-14 | 857-391-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHARLESTN | MA |
| 2022-01-14 | 857-391-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHARLESTN | MA |
| 2022-01-10 | 857-297-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | NEWTON | MA |
| 2022-01-10 | 857-297-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | NEWTON | MA |
| 2022-01-10 | 857-387-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | QUINCY | MA |
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.