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 520
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-07-20 | 520-767-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CASAGRANDE | AZ |
| 2026-01-14 | 520-652-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | WHITLOW | AZ |
| 2025-09-12 | 520-841-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | NOGALES | AZ |
| 2025-08-07 | 520-522-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CASABLANCA | AZ |
| 2025-08-07 | 520-644-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | KOMATKE | AZ |
| 2025-08-07 | 520-755-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | LONE BUTTE | AZ |
| 2025-08-07 | 520-762-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | TUCSON | AZ |
| 2025-07-03 | 520-949-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SANTA ROSA | AZ |
| 2025-06-26 | 520-588-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CASCABEL | AZ |
| 2025-06-26 | 520-676-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | WILLCOX | AZ |
| 2025-06-26 | 520-823-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SASABE | AZ |
| 2025-06-26 | 520-899-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MARCOPAVLG | AZ |
| 2025-06-26 | 520-966-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SILVERBELL | AZ |
| 2024-09-13 | 520-277-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | WHITLOW | AZ |
| 2024-07-19 | 520-264-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | NOGALES | AZ |
| 2024-07-19 | 520-359-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | TUCSON | AZ |
| 2024-05-31 | 520-210-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | TOMBSTONE | AZ |
| 2024-05-31 | 520-527-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BENSON | AZ |
| 2024-05-31 | 520-645-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | DOUGLAS | AZ |
| 2024-05-31 | 520-827-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SUPERIOR | AZ |
| 2024-01-05 | 520-567-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HAYDEN | AZ |
| 2024-01-05 | 520-569-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SAN MANUEL | AZ |
| 2024-01-05 | 520-583-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | WHITLOW | AZ |
| 2022-09-06 | 520-226-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SIERRAVIST | AZ |
| 2022-09-06 | 520-750-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | TUCSON | AZ |
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.