NumberResearchThousands-blocks in 641-541
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 641-541 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 641 blocks
Most active assignees, all time — NPA 641
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 |
|---|---|---|---|---|---|---|---|
| — | 641-541-0XXX | 0000–0999 | Reserved | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | SIGOURNEY | IA |
| 2018-03-02 | 641-541-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | SIGOURNEY | IA |
| — | 641-541-2XXX | 2000–2999 | Available | SIGOURNEY | IA | ||
| 2017-04-07 | 641-541-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SIGOURNEY | IA |
| 2021-08-11 | 641-541-4XXX | 4000–4999 | Assigned | ONVOY, LLC - IA | 221F | SIGOURNEY | IA |
| 2018-05-04 | 641-541-5XXX | 5000–5999 | Assigned | INTEGRATED PATH COMMUNCATIONS, LLC - IA | 544H | SIGOURNEY | IA |
| 2019-11-01 | 641-541-6XXX | 6000–6999 | Assigned | ONVOY, LLC - IA | 221F | SIGOURNEY | IA |
| 2017-02-23 | 641-541-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | SIGOURNEY | IA |
| 2024-02-08 | 641-541-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SIGOURNEY | IA |
| 2025-06-02 | 641-541-9XXX | 9000–9999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | SIGOURNEY | IA |
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.