NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

4 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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
ONVOY, LLC - IA 2
T-MOBILE USA, INC. 1
NEW CINGULAR WIRELESS PCS, LLC - IL 1
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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2004-01-15 641-895-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 CENTERVL IA
2004-01-15 641-895-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IA 6266 CENTERVL IA
2003-12-02 641-257-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 CHARLES CY IA
2003-12-02 641-257-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IA 6266 CHARLES CY IA
2003-10-28 641-226-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IA 6266 OTTUMWA IA
2003-10-28 641-512-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IA 6266 MASON CITY IA
2003-10-13 641-202-2XXX 2000–2999Assigned IOWA RSA 2 LIMITED PARTNERSHIP DBA CHAT MOBILITY 9572 CRESTON IA
2003-10-13 641-203-5XXX 5000–5999Assigned IOWA RSA 2 LIMITED PARTNERSHIP DBA CHAT MOBILITY 9572 CHARITON IA
2003-09-05 641-328-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IA 6266 MARSHALLTN IA
2003-09-04 641-328-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IA 6266 MARSHALLTN IA
2003-08-13 641-780-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 PELLA IA
2003-06-05 641-990-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 GRINNELL IA
2003-06-02 641-691-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARSHALLTN IA
2003-03-25 641-226-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J OTTUMWA IA
2003-03-25 641-352-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J MARSHALLTN IA
2003-01-31 641-332-3XXX 3000–3999Assigned GUTHRIE TELECOMMUNICATIONS NETWORK, INC. - IA 5840 GUTHRIECTR IA
2003-01-21 641-295-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OSKALOOSA IA
2002-10-31 641-203-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 CHARITON IA
2002-10-31 641-203-3XXX 3000–3999Assigned UNITED STATES CELLULAR - IA 6266 CHARITON IA
2002-10-31 641-203-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IA 6266 CHARITON IA
2002-10-31 641-373-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 IOWA FALLS IA
2002-10-31 641-373-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IA 6266 IOWA FALLS IA
2002-10-31 641-373-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 IOWA FALLS IA
2002-10-31 641-373-3XXX 3000–3999Assigned UNITED STATES CELLULAR - IA 6266 IOWA FALLS IA
2002-10-31 641-373-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IA 6266 IOWA FALLS IA
2002-10-31 641-414-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 OSCEOLA IA
2002-10-31 641-414-3XXX 3000–3999Assigned UNITED STATES CELLULAR - IA 6266 OSCEOLA IA
2002-05-08 641-832-2XXX 2000–2999Assigned OSAGE MUNICIPAL COMMUNICATIONS UTILITY - IA 9758 OSAGE IA
2002-05-08 641-832-3XXX 3000–3999Assigned OSAGE MUNICIPAL COMMUNICATIONS UTILITY - IA 9758 OSAGE IA
2001-11-01 641-332-2XXX 2000–2999Assigned GUTHRIE TELECOMMUNICATIONS NETWORK, INC. - IA 5840 GUTHRIECTR 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.