NumberResearchRecent thousands-block assignments
9 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 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 |
|---|---|---|---|---|---|---|---|
| 2003-08-18 | 928-642-1XXX | 1000–1999 | Assigned | QWEST CORPORATION | 9636 | PRESCOTT | AZ |
| 2003-06-05 | 928-261-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | YUMA | AZ |
| 2003-04-17 | 928-286-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | FLAGSTAFF | AZ |
| 2003-03-05 | 928-261-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | YUMA | AZ |
| 2003-03-05 | 928-446-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | YUMA | AZ |
| 2003-02-28 | 928-230-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | LKHAVASUCY | AZ |
| 2003-02-27 | 928-446-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | YUMA | AZ |
| 2003-02-12 | 928-208-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | LKHAVASUCY | AZ |
| — | 928-489-0XXX | 0000–0999 | Assigned | SMITH BAGLEY INC. DBA CELLULAR ONE OF NE ARIZONA | 4146 | KAYENTA | 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.