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
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-06-12 | 857-399-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ROXBURY | MA |
| 2026-04-06 | 857-600-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CAMBRIDGE | MA |
| 2025-09-23 | 857-424-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ROXBURY | MA |
| 2025-08-05 | 857-600-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CAMBRIDGE | MA |
| 2025-01-14 | 857-526-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | QUINCY | MA |
| 2024-10-15 | 857-393-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BOSTON | MA |
| 2024-08-12 | 857-597-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | WINTHROP | MA |
| 2024-08-12 | 857-663-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | DORCHESTER | MA |
| 2024-04-09 | 857-231-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | NEWTON | MA |
| 2024-01-09 | 857-217-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | DORCHESTER | MA |
| 2024-01-08 | 857-756-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CAMBRIDGE | MA |
| 2023-07-07 | 857-378-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BOSTON | MA |
| 2022-04-07 | 857-373-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BELMONT | MA |
| 2022-03-14 | 857-663-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | DORCHESTER | MA |
| 2022-03-14 | 857-703-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HYDE PARK | 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.