NumberResearchThousands-blocks in 435-567
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 435-567 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
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Jun 2026
May 2026
Apr 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-02-28 | 435-567-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | RICHFIELD | UT |
| 2022-03-16 | 435-567-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | RICHFIELD | UT |
| — | 435-567-2XXX | 2000–2999 | Available | RICHFIELD | UT | ||
| 2023-04-12 | 435-567-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | RICHFIELD | UT |
| 2024-12-26 | 435-567-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | RICHFIELD | UT |
| — | 435-567-5XXX | 5000–5999 | Available | RICHFIELD | UT | ||
| 2023-08-31 | 435-567-6XXX | 6000–6999 | Assigned | PEERLESS NETWORK OF UTAH, LLC - UT | 526H | RICHFIELD | UT |
| 2022-08-10 | 435-567-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | RICHFIELD | UT |
| 2022-02-24 | 435-567-8XXX | 8000–8999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | RICHFIELD | UT |
| 2024-05-31 | 435-567-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | RICHFIELD | 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.