NumberResearchRecent thousands-block assignments
3 blocks assigned in July 2026 · 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, July 2026 — NPA 520
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-07-24 | 520-368-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF ARIZONA, LLC - AZ | 579F | DOUGLAS | AZ |
| 2026-07-24 | 520-924-5XXX | 5000–5999 | Assigned | PEERLESS NETWORK OF ARIZONA, LLC - AZ | 579F | NOGALES | AZ |
| 2026-07-20 | 520-767-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CASAGRANDE | 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.