NumberResearchThousands-blocks in 435-522
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 435-522 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 435 blocks
Most active assignees, all time — NPA 435
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2018-04-12 | 435-522-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | ST GEORGE | UT |
| 2019-05-28 | 435-522-1XXX | 1000–1999 | Assigned | FIRSTDIGITAL COMMUNICATIONS, LLC | 716D | ST GEORGE | UT |
| 2018-01-22 | 435-522-2XXX | 2000–2999 | Assigned | QWEST CORPORATION | 9636 | ST GEORGE | UT |
| 2018-04-19 | 435-522-3XXX | 3000–3999 | Assigned | ONVOY, LLC - UT | 871E | ST GEORGE | UT |
| 2019-10-29 | 435-522-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2018-09-25 | 435-522-5XXX | 5000–5999 | Assigned | ONVOY, LLC - UT | 871E | ST GEORGE | UT |
| 2021-08-05 | 435-522-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | ST GEORGE | UT |
| 2017-11-17 | 435-522-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | ST GEORGE | UT |
| 2018-07-03 | 435-522-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ST GEORGE | UT |
| 2018-03-14 | 435-522-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ST GEORGE | 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.