NumberResearchThousands-blocks in 435-250
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 435-250 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
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-03-16 | 435-250-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | NEPHI | UT |
| — | 435-250-1XXX | 1000–1999 | Available | NEPHI | UT | ||
| — | 435-250-2XXX | 2000–2999 | Available | NEPHI | UT | ||
| 2006-12-12 | 435-250-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | NEPHI | UT |
| 2012-08-29 | 435-250-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - UT | 117F | NEPHI | UT |
| — | 435-250-5XXX | 5000–5999 | Available | NEPHI | UT | ||
| — | 435-250-6XXX | 6000–6999 | Available | NEPHI | UT | ||
| 2016-02-10 | 435-250-7XXX | 7000–7999 | Assigned | PEERLESS NETWORK OF UTAH, LLC - UT | 526H | NEPHI | UT |
| 2009-07-27 | 435-250-8XXX | 8000–8999 | Assigned | CENTRAL TELCOM SVCS DBA CENTRACOM INTERACTIVE - NV | 791D | NEPHI | UT |
| 2025-01-15 | 435-250-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | NEPHI | 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.