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 435
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2018-01-22 | 435-522-2XXX | 2000–2999 | Assigned | QWEST CORPORATION | 9636 | ST GEORGE | UT |
| 2010-11-19 | 435-868-6XXX | 6000–6999 | Assigned | QWEST CORPORATION | 9636 | CEDAR CITY | UT |
| 2008-09-15 | 435-627-6XXX | 6000–6999 | Assigned | QWEST CORPORATION | 9636 | ST GEORGE | UT |
| 2007-01-05 | 435-277-2XXX | 2000–2999 | Assigned | QWEST CORPORATION | 9636 | TOOELE | UT |
| 2007-01-05 | 435-277-4XXX | 4000–4999 | Assigned | QWEST CORPORATION | 9636 | TOOELE | UT |
| 2006-09-22 | 435-884-7XXX | 7000–7999 | Assigned | QWEST CORPORATION | 9636 | TOOELE | UT |
| 2006-04-19 | 435-277-7XXX | 7000–7999 | Assigned | QWEST CORPORATION | 9636 | TOOELE | UT |
| 2006-04-19 | 435-277-8XXX | 8000–8999 | Assigned | QWEST CORPORATION | 9636 | TOOELE | UT |
| 2006-02-24 | 435-754-1XXX | 1000–1999 | Assigned | QWEST CORPORATION | 9636 | LOGAN | UT |
| 2006-02-24 | 435-754-2XXX | 2000–2999 | Assigned | QWEST CORPORATION | 9636 | LOGAN | UT |
| 2005-12-02 | 435-705-2XXX | 2000–2999 | Assigned | QWEST CORPORATION | 9636 | ST GEORGE | UT |
| 2005-07-21 | 435-884-2XXX | 2000–2999 | Assigned | QWEST CORPORATION | 9636 | TOOELE | UT |
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.