NumberResearchThousands-blocks in 401-592
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 401-592 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 401 blocks
Most active assignees, all time — NPA 401
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 |
|---|---|---|---|---|---|---|---|
| — | 401-592-0XXX | 0000–0999 | Reserved | COMCAST IP PHONE, LLC | 318J | LTLCOMPTON | RI |
| 2005-12-07 | 401-592-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - RI | 4016 | LTLCOMPTON | RI |
| 2020-06-12 | 401-592-2XXX | 2000–2999 | Assigned | ONVOY, LLC - RI | 977E | LTLCOMPTON | RI |
| 2004-08-05 | 401-592-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - RI | 4016 | LTLCOMPTON | RI |
| 2002-05-29 | 401-592-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - RI | 003F | LTLCOMPTON | RI |
| 2020-06-12 | 401-592-5XXX | 5000–5999 | Assigned | ONVOY, LLC - RI | 977E | LTLCOMPTON | RI |
| — | 401-592-6XXX | 6000–6999 | Available | LTLCOMPTON | RI | ||
| 2010-07-29 | 401-592-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - RI | 003F | LTLCOMPTON | RI |
| 2010-07-29 | 401-592-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - RI | 003F | LTLCOMPTON | RI |
| — | 401-592-9XXX | 9000–9999 | Available | LTLCOMPTON | RI |
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.