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 520
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-11-14 | 520-736-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CASAGRANDE | AZ |
| 2024-11-14 | 520-736-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CASAGRANDE | AZ |
| 2024-11-14 | 520-736-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CASAGRANDE | AZ |
| 2024-11-14 | 520-739-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2024-11-14 | 520-739-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2024-11-14 | 520-739-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2023-09-28 | 520-683-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CASAGRANDE | AZ |
| 2023-09-28 | 520-683-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CASAGRANDE | AZ |
| 2023-09-28 | 520-683-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CASAGRANDE | AZ |
| 2023-09-28 | 520-683-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CASAGRANDE | AZ |
| 2023-09-28 | 520-683-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CASAGRANDE | AZ |
| 2023-08-17 | 520-283-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2023-08-17 | 520-359-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2023-08-17 | 520-427-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2023-08-17 | 520-474-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2023-08-17 | 520-602-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2023-08-17 | 520-602-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2023-08-17 | 520-602-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2023-08-17 | 520-602-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2023-08-17 | 520-602-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2023-08-17 | 520-606-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2022-08-10 | 520-710-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2022-08-10 | 520-710-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2022-08-10 | 520-710-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2022-08-10 | 520-710-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2022-08-10 | 520-710-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2021-11-15 | 520-563-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BENSON | AZ |
| 2021-11-15 | 520-563-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BENSON | AZ |
| 2021-11-15 | 520-564-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DOUGLAS | AZ |
| 2021-11-15 | 520-564-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DOUGLAS | AZ |
| 2021-11-15 | 520-592-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | NOGALES | AZ |
| 2021-11-15 | 520-592-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | NOGALES | AZ |
| 2021-10-21 | 520-556-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SIERRAVIST | AZ |
| 2021-10-21 | 520-556-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SIERRAVIST | AZ |
| 2021-10-18 | 520-598-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CASAGRANDE | AZ |
| 2021-10-18 | 520-598-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CASAGRANDE | AZ |
| 2021-10-18 | 520-598-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CASAGRANDE | AZ |
| 2021-10-18 | 520-598-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CASAGRANDE | AZ |
| 2021-10-18 | 520-598-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CASAGRANDE | AZ |
| 2021-10-14 | 520-583-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WHITLOW | AZ |
| 2021-10-14 | 520-583-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WHITLOW | AZ |
| 2021-10-13 | 520-567-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HAYDEN | AZ |
| 2021-10-13 | 520-567-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HAYDEN | AZ |
| 2021-10-13 | 520-569-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SAN MANUEL | AZ |
| 2021-10-13 | 520-569-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SAN MANUEL | AZ |
| 2021-10-08 | 520-542-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2021-10-08 | 520-542-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2021-10-08 | 520-542-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2021-10-08 | 520-542-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
| 2021-10-08 | 520-542-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TUCSON | AZ |
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.