NumberResearchRecent thousands-block assignments
5 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, last 30 days — NPA 520
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-10-22 | 520-851-1XXX | 1000–1999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-851-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-851-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-851-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-851-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-851-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-851-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-851-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-851-9XXX | 9000–9999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-852-0XXX | 0000–0999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-852-1XXX | 1000–1999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-852-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-852-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-852-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-852-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-852-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-852-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-852-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-852-9XXX | 9000–9999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-853-0XXX | 0000–0999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-853-1XXX | 1000–1999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-853-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-853-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-853-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-853-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-853-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-853-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-853-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-853-9XXX | 9000–9999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-854-0XXX | 0000–0999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-854-1XXX | 1000–1999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-854-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-854-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-854-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-854-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-854-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-854-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-854-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-854-9XXX | 9000–9999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-855-0XXX | 0000–0999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-855-1XXX | 1000–1999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-855-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-855-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-855-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-855-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-855-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-855-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-855-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-22 | 520-855-9XXX | 9000–9999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SIERRAVIST | AZ |
| 2024-10-21 | 520-736-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CASAGRANDE | 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.