NumberResearchThousands-blocks in 641-289
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 641-289 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2009-06-04 | 641-289-0XXX | 0000–0999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | LAMONI | IA |
| 2010-03-04 | 641-289-1XXX | 1000–1999 | Assigned | MCC TELEPHONY OF IOWA, LLC - IA | 751F | LAMONI | IA |
| 2018-05-03 | 641-289-2XXX | 2000–2999 | Assigned | INTEGRATED PATH COMMUNCATIONS, LLC - IA | 544H | LAMONI | IA |
| 2021-01-08 | 641-289-3XXX | 3000–3999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | LAMONI | IA |
| 2022-04-18 | 641-289-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | LAMONI | IA |
| 2024-07-17 | 641-289-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | LAMONI | IA |
| — | 641-289-6XXX | 6000–6999 | Available | LAMONI | IA | ||
| — | 641-289-7XXX | 7000–7999 | Available | LAMONI | IA | ||
| 2020-10-06 | 641-289-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | LAMONI | IA |
| 2018-06-18 | 641-289-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | LAMONI | 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.