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 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 |
|---|---|---|---|---|---|---|---|
| 2017-01-18 | 928-471-1XXX | 1000–1999 | Assigned | QWEST CORPORATION | 9636 | PAYSON | AZ |
| 2017-01-18 | 928-471-2XXX | 2000–2999 | Assigned | QWEST CORPORATION | 9636 | PAYSON | AZ |
| 2017-01-18 | 928-471-3XXX | 3000–3999 | Assigned | QWEST CORPORATION | 9636 | PAYSON | AZ |
| 2017-01-13 | 928-596-4XXX | 4000–4999 | Assigned | QWEST CORPORATION | 9636 | PAYSON | AZ |
| 2009-11-06 | 928-515-5XXX | 5000–5999 | Assigned | QWEST CORPORATION | 9636 | PRESCOTT | AZ |
| 2009-11-06 | 928-515-6XXX | 6000–6999 | Assigned | QWEST CORPORATION | 9636 | PRESCOTT | AZ |
| 2009-11-06 | 928-515-7XXX | 7000–7999 | Assigned | QWEST CORPORATION | 9636 | PRESCOTT | AZ |
| 2009-11-03 | 928-387-0XXX | 0000–0999 | Assigned | QWEST CORPORATION | 9636 | SAFFORD | AZ |
| 2008-10-01 | 928-458-2XXX | 2000–2999 | Assigned | QWEST CORPORATION | 9636 | PRESCOTT | AZ |
| 2008-06-02 | 928-387-8XXX | 8000–8999 | Assigned | QWEST CORPORATION | 9636 | SAFFORD | AZ |
| 2007-06-28 | 928-487-9XXX | 9000–9999 | Assigned | QWEST CORPORATION | 9636 | GLOBE | AZ |
| 2007-05-31 | 928-247-8XXX | 8000–8999 | Assigned | QWEST CORPORATION | 9636 | YUMA | AZ |
| 2007-05-31 | 928-637-7XXX | 7000–7999 | Assigned | QWEST CORPORATION | 9636 | FLAGSTAFF | AZ |
| 2007-03-23 | 928-277-2XXX | 2000–2999 | Assigned | QWEST CORPORATION | 9636 | PRESCOTT | AZ |
| 2006-10-16 | 928-432-4XXX | 4000–4999 | Assigned | QWEST CORPORATION | 9636 | SAFFORD | AZ |
| 2005-08-26 | 928-792-5XXX | 5000–5999 | Assigned | QWEST CORPORATION | 9636 | SAFFORD | AZ |
| 2005-06-08 | 928-203-3XXX | 3000–3999 | Assigned | QWEST CORPORATION | 9636 | SEDONA | AZ |
| 2005-02-16 | 928-679-7XXX | 7000–7999 | Assigned | QWEST CORPORATION | 9636 | FLAGSTAFF | AZ |
| 2005-02-16 | 928-679-8XXX | 8000–8999 | Assigned | QWEST CORPORATION | 9636 | FLAGSTAFF | AZ |
| 2003-11-17 | 928-502-3XXX | 3000–3999 | Assigned | QWEST CORPORATION | 9636 | YUMA | AZ |
| 2003-11-17 | 928-502-4XXX | 4000–4999 | Assigned | QWEST CORPORATION | 9636 | YUMA | AZ |
| 2003-11-17 | 928-502-5XXX | 5000–5999 | Assigned | QWEST CORPORATION | 9636 | YUMA | AZ |
| 2003-11-17 | 928-502-6XXX | 6000–6999 | Assigned | QWEST CORPORATION | 9636 | YUMA | AZ |
| 2003-11-17 | 928-502-7XXX | 7000–7999 | Assigned | QWEST CORPORATION | 9636 | YUMA | AZ |
| 2003-11-17 | 928-502-8XXX | 8000–8999 | Assigned | QWEST CORPORATION | 9636 | YUMA | AZ |
| 2003-08-18 | 928-642-1XXX | 1000–1999 | Assigned | QWEST CORPORATION | 9636 | PRESCOTT | 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.