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 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 |
|---|---|---|---|---|---|---|---|
| 2025-12-26 | 857-429-7XXX | 7000–7999 | Assigned | TELNYX LLC | 073H | ROXBURY | MA |
| 2024-04-10 | 857-279-7XXX | 7000–7999 | Assigned | TELNYX LLC | 073H | NEWTON | MA |
| 2023-06-28 | 857-363-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | EVERETT | MA |
| 2022-12-07 | 857-382-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | EASTBOSTON | MA |
| 2022-07-05 | 857-394-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | BELMONT | MA |
| 2021-12-02 | 857-381-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | BROOKLINE | MA |
| 2021-10-25 | 857-422-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | SO BOSTON | MA |
| 2021-09-13 | 857-382-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | EASTBOSTON | MA |
| 2021-04-09 | 857-575-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | SOMERVILLE | MA |
| 2021-04-07 | 857-597-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | WINTHROP | MA |
| 2021-02-02 | 857-340-2XXX | 2000–2999 | Assigned | TELNYX LLC | 073H | BROOKLINE | MA |
| 2021-02-02 | 857-706-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | CAMBRIDGE | MA |
| 2021-02-02 | 857-754-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | QUINCY | MA |
| 2021-02-02 | 857-837-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | CHARLESTN | MA |
| 2019-08-20 | 857-361-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | BROOKLINE | MA |
| 2019-04-17 | 857-349-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | WINTHROP | MA |
| 2017-04-18 | 857-201-4XXX | 4000–4999 | Assigned | TELNYX LLC | 073H | WINTHROP | MA |
| 2017-04-18 | 857-386-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | CHELSEA | MA |
| 2017-04-17 | 857-760-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | WATERTOWN | MA |
| 2017-04-14 | 857-419-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | MILTON | MA |
| 2017-04-14 | 857-520-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | HYDE PARK | MA |
| 2017-04-12 | 857-773-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | JAMAICA PL | MA |
| 2017-04-10 | 857-410-2XXX | 2000–2999 | Assigned | TELNYX LLC | 073H | CHARLESTN | MA |
| 2017-04-10 | 857-663-3XXX | 3000–3999 | Assigned | TELNYX LLC | 073H | DORCHESTER | MA |
| 2017-04-07 | 857-414-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | BRIGHTON | MA |
| 2017-03-01 | 857-424-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | ROXBURY | MA |
| 2017-02-28 | 857-895-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | BOSTON | MA |
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.