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 928
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-06-02 | 928-880-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | KINGMAN | AZ |
| 2025-04-29 | 928-508-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | YUMA | AZ |
| 2025-04-29 | 928-540-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | LKHAVASUCY | AZ |
| 2023-10-25 | 928-456-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | FLAGSTAFF | AZ |
| 2023-09-20 | 928-512-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | SOMERTON | AZ |
| 2023-07-19 | 928-418-0XXX | 0000–0999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | KINGMAN | AZ |
| 2023-07-19 | 928-732-0XXX | 0000–0999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | LKHAVASUCY | AZ |
| 2023-06-21 | 928-483-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | YUMA | 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.