NumberResearchThousands-blocks in 401-488
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 401-488 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
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-12-18 | 401-488-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | WOONSOCKET | RI |
| — | 401-488-1XXX | 1000–1999 | Available | WOONSOCKET | RI | ||
| 2004-11-18 | 401-488-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | WOONSOCKET | RI |
| 2019-11-06 | 401-488-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | WOONSOCKET | RI |
| 2017-11-13 | 401-488-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | WOONSOCKET | RI |
| 2008-08-21 | 401-488-5XXX | 5000–5999 | Assigned | YMAX COMMUNICATIONS CORP. - RI | 363E | WOONSOCKET | RI |
| 2008-08-21 | 401-488-6XXX | 6000–6999 | Assigned | YMAX COMMUNICATIONS CORP. - RI | 363E | WOONSOCKET | RI |
| 2015-11-06 | 401-488-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | WOONSOCKET | RI |
| 2026-06-03 | 401-488-8XXX | 8000–8999 | Assigned | AHOI LLC | 883K | WOONSOCKET | RI |
| 2023-07-14 | 401-488-9XXX | 9000–9999 | Assigned | ONVOY, LLC - RI | 977E | WOONSOCKET | 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.