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
2011-09-29 641-316-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E IOWA FALLS IA
2011-09-29 641-632-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E ROSE HILL IA
2011-09-12 641-242-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 BLOOMFIELD IA
2011-09-12 641-278-6XXX 6000–6999Assigned UNITED STATES CELLULAR - IA 6266 CRESTON IA
2011-09-06 641-435-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E NASHUA IA
2011-08-25 641-812-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E HAMPTON IA
2011-08-18 641-519-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E GARNER IA
2011-06-10 641-638-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OSKALOOSA IA
2011-06-03 641-208-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 BLOOMFIELD IA
2011-04-22 641-224-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SIGOURNEY IA
2011-04-22 641-243-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MASON CITY IA
2011-04-22 641-758-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 MARSHALLTN IA
2011-04-22 641-858-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELDORA IA
2011-04-22 641-863-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BRITT IA
2011-04-21 641-317-0XXX 0000–0999Assigned GREENWAY COMMUNICATIONS L.L.C. - IA 860F KANAWHA IA
2011-04-21 641-317-1XXX 1000–1999Assigned GREENWAY COMMUNICATIONS L.L.C. - IA 860F KANAWHA IA
2011-04-08 641-229-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 NEWHAMPTON IA
2011-03-14 641-230-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PELLA IA
2011-03-08 641-583-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F MANLY IA
2011-01-26 641-243-7XXX 7000–7999Assigned WINNEBAGO COOPERATIVE TELEPHONE ASSOCIATION - IA 6103 MASON CITY IA
2011-01-26 641-863-7XXX 7000–7999Assigned WINNEBAGO COOPERATIVE TELEPHONE ASSOCIATION - IA 6103 BRITT IA
2011-01-26 641-924-7XXX 7000–7999Assigned WINNEBAGO COOPERATIVE TELEPHONE ASSOCIATION - IA 6103 GARNER IA
2011-01-06 641-351-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MARSHALLTN IA
2010-11-24 641-247-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 FONTANELLE IA
2010-10-21 641-812-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 HAMPTON IA
2010-09-08 641-328-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E MARSHALLTN IA
2010-09-08 641-426-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CHARLES CY IA
2010-09-08 641-569-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E OSKALOOSA IA
2010-09-08 641-954-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E OTTUMWA IA
2010-08-19 641-428-1XXX 1000–1999Assigned QWEST CORPORATION 9631 MASON CITY IA
2010-08-19 641-428-2XXX 2000–2999Assigned QWEST CORPORATION 9631 MASON CITY IA
2010-08-19 641-428-3XXX 3000–3999Assigned QWEST CORPORATION 9631 MASON CITY IA
2010-08-19 641-428-4XXX 4000–4999Assigned QWEST CORPORATION 9631 MASON CITY IA
2010-08-19 641-428-5XXX 5000–5999Assigned QWEST CORPORATION 9631 MASON CITY IA
2010-08-19 641-428-6XXX 6000–6999Assigned QWEST CORPORATION 9631 MASON CITY IA
2010-08-19 641-428-7XXX 7000–7999Assigned QWEST CORPORATION 9631 MASON CITY IA
2010-08-19 641-428-8XXX 8000–8999Assigned QWEST CORPORATION 9631 MASON CITY IA
2010-07-08 641-473-6XXX 6000–6999Assigned HEART OF IOWA VENTURES, L.L.C. - IA 346F GLADBROOK IA
2010-07-02 641-832-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 OSAGE IA
2010-06-03 641-351-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E MARSHALLTN IA
2010-06-03 641-638-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E OSKALOOSA IA
2010-06-03 641-954-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E OTTUMWA IA
2010-03-17 641-366-0XXX 0000–0999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F CONRAD IA
2010-03-11 641-812-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F HAMPTON IA
2010-03-11 641-924-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 GARNER IA
2010-03-10 641-519-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F GARNER IA
2010-03-09 641-242-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F BLOOMFIELD IA
2010-03-09 641-458-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 GENEVA IA
2010-03-09 641-523-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F CORYDON IA
2010-03-09 641-569-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 OSKALOOSA 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.