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 571
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-08-19 | 571-931-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | TRIANGLE | VA |
| 2026-07-08 | 571-485-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HERNDON | VA |
| 2025-12-19 | 571-626-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | TRIANGLE | VA |
| 2025-09-10 | 571-715-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HERNDON | VA |
| 2025-08-05 | 571-246-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | LEESBURG | VA |
| 2025-07-01 | 571-636-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HAYMARKET | VA |
| 2024-12-03 | 571-394-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | TRIANGLE | VA |
| 2024-08-13 | 571-491-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | DULLES | VA |
| 2024-01-16 | 571-660-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | TRIANGLE | VA |
| 2024-01-11 | 571-491-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | DULLES | VA |
| 2024-01-11 | 571-619-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MANASSAS | VA |
| 2024-01-10 | 571-374-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | INDENDNTHL | VA |
| 2024-01-10 | 571-387-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HERNDON | VA |
| 2024-01-10 | 571-417-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | LEESBURG | VA |
| 2024-01-10 | 571-427-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | OCCOQUAN | VA |
| 2024-01-08 | 571-349-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ARCOLA | VA |
| 2024-01-08 | 571-646-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ENGLESIDE | VA |
| 2021-09-28 | 571-222-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HAYMARKET | VA |
| 2021-04-17 | 571-432-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | WSNGTNZN19 | VA |
| 2019-03-18 | 571-400-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | WSNGTNZN08 | VA |
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.