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
2008-03-12 641-814-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F OTTUMWA IA
2008-01-29 641-569-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F OSKALOOSA IA
2008-01-28 641-316-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F IOWA FALLS IA
2008-01-28 641-352-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F MARSHALLTN IA
2008-01-28 641-456-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F HAMPTON IA
2008-01-28 641-552-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F CHARLES CY IA
2008-01-28 641-903-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F MASON CITY IA
2008-01-09 641-844-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MARSHALLTN IA
2007-12-04 641-455-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IA 6266 OTTUMWA IA
2007-11-21 641-844-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARSHALLTN IA
2007-10-30 641-230-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PELLA IA
2007-09-18 641-583-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANLY IA
2007-09-13 641-745-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 FONTANELLE IA
2007-09-07 641-223-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 OSCEOLA IA
2007-08-22 641-278-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 CRESTON IA
2007-08-07 641-355-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CLEAR LAKE IA
2007-07-09 641-373-6XXX 6000–6999Assigned UNITED STATES CELLULAR - IA 6266 IOWA FALLS IA
2007-07-09 641-451-5XXX 5000–5999Assigned UNITED STATES CELLULAR - IA 6266 FAIRFIELD IA
2007-06-23 641-980-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OTTUMWA IA
2007-06-19 641-552-5XXX 5000–5999Assigned OMNITEL COMMUNICATIONS, INC. - IA 3620 CHARLES CY IA
2007-06-04 641-325-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IA 6266 GRINNELL IA
2007-06-01 641-569-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OSKALOOSA IA
2007-05-15 641-210-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MASON CITY IA
2007-05-10 641-831-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWTON IA
2007-03-29 641-223-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OSCEOLA IA
2007-03-28 641-454-4XXX 4000–4999Assigned WINNEBAGO COOPERATIVE TELEPHONE ASSOCIATION - IA 6103 MANLY IA
2007-03-28 641-903-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MASON CITY IA
2007-03-28 641-903-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MASON CITY IA
2007-03-20 641-203-6XXX 6000–6999Assigned UNITED STATES CELLULAR - IA 6266 CHARITON IA
2007-03-20 641-203-7XXX 7000–7999Assigned UNITED STATES CELLULAR - IA 6266 CHARITON IA
2007-03-20 641-204-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IA 6266 PELLA IA
2007-03-20 641-204-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 PELLA IA
2007-03-20 641-216-3XXX 3000–3999Assigned UNITED STATES CELLULAR - IA 6266 CENTERVL IA
2007-03-20 641-352-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 MARSHALLTN IA
2007-03-20 641-414-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 OSCEOLA IA
2007-03-20 641-715-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IA 6266 CHARLES CY IA
2007-03-20 641-903-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IA 6266 MASON CITY IA
2007-03-19 641-858-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ELDORA IA
2007-03-05 641-444-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELMOND IA
2007-03-01 641-569-3XXX 3000–3999Assigned UNITED STATES CELLULAR - IA 6266 OSKALOOSA IA
2007-02-27 641-202-6XXX 6000–6999Assigned UNITED STATES CELLULAR - IA 6266 CRESTON IA
2007-02-16 641-980-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OTTUMWA IA
2007-02-13 641-218-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IA 6266 KNOXVILLE IA
2007-02-13 641-275-5XXX 5000–5999Assigned UNITED STATES CELLULAR - IA 6266 NEWTON IA
2007-02-09 641-844-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MARSHALLTN IA
2007-02-06 641-455-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 OTTUMWA IA
2007-01-12 641-251-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IA 6266 FORESTCITY IA
2006-12-22 641-923-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 GARNER IA
2006-12-04 641-224-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 SIGOURNEY IA
2006-11-16 641-715-3XXX 3000–3999Assigned OMNITEL COMMUNICATIONS, INC. - IA 3620 CHARLES CY 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.