NumberResearchRecent thousands-block assignments
4 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, last 30 days — 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 |
|---|---|---|---|---|---|---|---|
| 2005-02-17 | 641-226-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | OTTUMWA | IA |
| 2005-02-15 | 641-426-5XXX | 5000–5999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | CHARLES CY | IA |
| 2005-02-15 | 641-426-6XXX | 6000–6999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | CHARLES CY | IA |
| 2005-02-08 | 641-426-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CHARLES CY | IA |
| 2005-02-08 | 641-426-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CHARLES CY | IA |
| 2005-02-03 | 641-202-9XXX | 9000–9999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | CRESTON | IA |
| 2005-01-07 | 641-208-5XXX | 5000–5999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | BLOOMFIELD | IA |
| 2005-01-07 | 641-208-6XXX | 6000–6999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | BLOOMFIELD | IA |
| 2005-01-07 | 641-208-7XXX | 7000–7999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | BLOOMFIELD | IA |
| 2004-12-30 | 641-352-4XXX | 4000–4999 | Assigned | PAETEC ITEL, LLC | 829J | MARSHALLTN | IA |
| 2004-12-29 | 641-202-3XXX | 3000–3999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | CRESTON | IA |
| 2004-12-29 | 641-202-4XXX | 4000–4999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | CRESTON | IA |
| 2004-12-29 | 641-494-4XXX | 4000–4999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | MASON CITY | IA |
| 2004-12-29 | 641-494-6XXX | 6000–6999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | MASON CITY | IA |
| 2004-12-29 | 641-494-7XXX | 7000–7999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | MASON CITY | IA |
| 2004-12-29 | 641-494-8XXX | 8000–8999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | MASON CITY | IA |
| 2004-12-29 | 641-494-9XXX | 9000–9999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | MASON CITY | IA |
| 2004-12-13 | 641-210-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | MASON CITY | IA |
| 2004-11-29 | 641-231-1XXX | 1000–1999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | CLEAR LAKE | IA |
| 2004-11-05 | 641-583-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MANLY | IA |
| 2004-09-17 | 641-693-5XXX | 5000–5999 | Assigned | LOCAL TELEPHONE DATA SERVICES CORP. | 2842 | LIBERTYVL | IA |
| 2004-09-07 | 641-228-0XXX | 0000–0999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | CHARLES CY | IA |
| 2004-09-07 | 641-257-7XXX | 7000–7999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | CHARLES CY | IA |
| 2004-08-17 | 641-204-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | PELLA | IA |
| 2004-06-02 | 641-512-8XXX | 8000–8999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | MASON CITY | IA |
| 2004-05-19 | 641-351-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | MARSHALLTN | IA |
| 2004-04-29 | 641-456-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | HAMPTON | IA |
| 2004-04-29 | 641-832-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | OSAGE | IA |
| 2004-01-16 | 641-218-0XXX | 0000–0999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | KNOXVILLE | IA |
| 2004-01-16 | 641-218-8XXX | 8000–8999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | KNOXVILLE | IA |
| 2004-01-16 | 641-218-9XXX | 9000–9999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | KNOXVILLE | IA |
| 2004-01-16 | 641-226-1XXX | 1000–1999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | OTTUMWA | IA |
| 2004-01-16 | 641-226-2XXX | 2000–2999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | OTTUMWA | IA |
| 2004-01-16 | 641-226-3XXX | 3000–3999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | OTTUMWA | IA |
| 2004-01-16 | 641-226-4XXX | 4000–4999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | OTTUMWA | IA |
| 2004-01-16 | 641-417-1XXX | 1000–1999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | NEWTON | IA |
| 2004-01-16 | 641-417-8XXX | 8000–8999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | NEWTON | IA |
| 2004-01-16 | 641-417-9XXX | 9000–9999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | NEWTON | IA |
| 2004-01-16 | 641-691-3XXX | 3000–3999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | MARSHALLTN | IA |
| 2004-01-16 | 641-691-4XXX | 4000–4999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | MARSHALLTN | IA |
| 2004-01-16 | 641-691-5XXX | 5000–5999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | MARSHALLTN | IA |
| 2004-01-16 | 641-691-6XXX | 6000–6999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | MARSHALLTN | IA |
| 2004-01-16 | 641-691-7XXX | 7000–7999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | MARSHALLTN | IA |
| 2004-01-16 | 641-691-8XXX | 8000–8999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | MARSHALLTN | IA |
| 2004-01-16 | 641-691-9XXX | 9000–9999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | MARSHALLTN | IA |
| 2004-01-16 | 641-990-9XXX | 9000–9999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | GRINNELL | IA |
| 2004-01-15 | 641-295-4XXX | 4000–4999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | OSKALOOSA | IA |
| 2004-01-15 | 641-295-5XXX | 5000–5999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | OSKALOOSA | IA |
| 2004-01-15 | 641-295-6XXX | 6000–6999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | OSKALOOSA | IA |
| 2004-01-15 | 641-780-9XXX | 9000–9999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | PELLA | 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.