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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2015-06-23 641-583-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E MANLY IA
2015-06-18 641-980-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OTTUMWA IA
2015-06-15 641-223-5XXX 5000–5999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 OSCEOLA IA
2015-06-03 641-854-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E MARSHALLTN IA
2015-06-01 641-351-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARSHALLTN IA
2015-05-29 641-552-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CHARLES CY IA
2015-05-29 641-715-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CHARLES CY IA
2015-05-18 641-225-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EDDYVILLE IA
2015-05-18 641-450-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MASON CITY IA
2015-04-28 641-251-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 FORESTCITY IA
2015-04-27 641-316-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E IOWA FALLS IA
2015-04-27 641-323-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E NORTHWOOD IA
2015-04-27 641-458-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E GENEVA IA
2015-04-13 641-231-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CLEAR LAKE IA
2015-03-09 641-854-6XXX 6000–6999Assigned QWEST CORPORATION 9631 MARSHALLTN IA
2015-03-09 641-854-7XXX 7000–7999Assigned QWEST CORPORATION 9631 MARSHALLTN IA
2015-03-09 641-854-8XXX 8000–8999Assigned QWEST CORPORATION 9631 MARSHALLTN IA
2015-02-27 641-640-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 IOWA FALLS IA
2015-01-29 641-676-9XXX 9000–9999Assigned MAHASKA COMMUNICATION GROUP, LLC - IA 916A OSKALOOSA IA
2014-12-31 641-530-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MASON CITY IA
2014-12-16 641-464-6XXX 6000–6999Assigned UNITED STATES CELLULAR - IA 6266 MOUNT AYR IA
2014-12-12 641-325-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 GRINNELL IA
2014-12-01 641-924-2XXX 2000–2999Assigned NORTHLAND COMMUNICATIONS, INC. - IA 068H GARNER IA
2014-11-13 641-583-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANLY IA
2014-10-27 641-352-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E MARSHALLTN IA
2014-10-13 641-450-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F MASON CITY IA
2014-10-10 641-464-9XXX 9000–9999Assigned AUREON COMMUNICATIONS, LLC 444G MOUNT AYR IA
2014-10-10 641-871-9XXX 9000–9999Assigned AUREON COMMUNICATIONS, LLC 444G KNOXVILLE IA
2014-10-10 641-931-9XXX 9000–9999Assigned AUREON COMMUNICATIONS, LLC 444G ALBIA IA
2014-09-25 641-903-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MASON CITY IA
2014-09-17 641-758-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARSHALLTN IA
2014-09-12 641-328-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MARSHALLTN IA
2014-08-05 641-455-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OTTUMWA IA
2014-07-17 641-450-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MASON CITY IA
2014-06-13 641-758-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 MARSHALLTN IA
2014-06-12 641-316-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E IOWA FALLS IA
2014-04-29 641-651-9XXX 9000–9999Assigned AUREON COMMUNICATIONS, LLC 444G PELLA IA
2014-04-22 641-481-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 TOLEDO IA
2014-04-22 641-530-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MASON CITY IA
2014-03-18 641-638-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 OSKALOOSA IA
2014-03-12 641-202-5XXX 5000–5999Assigned UNITED STATES CELLULAR - IA 6266 CRESTON IA
2014-02-25 641-481-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 TOLEDO IA
2014-02-24 641-224-5XXX 5000–5999Assigned UNITED STATES CELLULAR - IA 6266 SIGOURNEY IA
2014-02-12 641-233-6XXX 6000–6999Assigned AUREON COMMUNICATIONS, LLC 444G FAIRFIELD IA
2014-02-12 641-455-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E OTTUMWA IA
2014-02-04 641-552-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CHARLES CY IA
2013-12-18 641-841-1XXX 1000–1999Assigned AUREON COMMUNICATIONS, LLC 444G NEWTON IA
2013-12-12 641-278-9XXX 9000–9999Assigned AUREON COMMUNICATIONS, LLC 444G CRESTON IA
2013-12-06 641-758-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARSHALLTN IA
2013-11-26 641-781-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 NEWTON 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.