NumberResearchThousands-blocks in 225-435
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 225-435 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 225 blocks
Most active assignees, all time — NPA 225
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 |
|---|---|---|---|---|---|---|---|
| 2006-10-13 | 225-435-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | LIVINGSTON | LA |
| 2008-01-31 | 225-435-1XXX | 1000–1999 | Assigned | ADVANCED TEL., INC. - LA | 8839 | LIVINGSTON | LA |
| 2021-06-10 | 225-435-2XXX | 2000–2999 | Assigned | ONVOY, LLC - LA | 749E | LIVINGSTON | LA |
| 2009-07-20 | 225-435-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LIVINGSTON | LA |
| 2005-12-15 | 225-435-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - LA | 3232 | LIVINGSTON | LA |
| 2011-09-28 | 225-435-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - LA | 3232 | LIVINGSTON | LA |
| 2005-06-16 | 225-435-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | LIVINGSTON | LA |
| 2013-11-06 | 225-435-7XXX | 7000–7999 | Assigned | HUNT TELECOMMUNICATIONS, LLC - LA | 181D | LIVINGSTON | LA |
| 2016-03-15 | 225-435-8XXX | 8000–8999 | Assigned | ONVOY, LLC - LA | 749E | LIVINGSTON | LA |
| 2008-11-18 | 225-435-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - LA | 153F | LIVINGSTON | LA |
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.