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
2016-03-15 641-812-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F HAMPTON IA
2016-03-10 641-552-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F CHARLES CY IA
2016-03-10 641-552-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F CHARLES CY IA
2016-03-09 641-323-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F NORTHWOOD IA
2016-03-09 641-323-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F NORTHWOOD IA
2016-03-09 641-758-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F MARSHALLTN IA
2016-03-09 641-758-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F MARSHALLTN IA
2016-03-08 641-216-0XXX 0000–0999Assigned AUREON COMMUNICATIONS, LLC 444G CENTERVL IA
2016-03-07 641-458-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F GENEVA IA
2016-03-07 641-458-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F GENEVA IA
2016-03-02 641-925-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F GARNER IA
2016-03-02 641-925-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F GARNER IA
2016-03-01 641-640-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F IOWA FALLS IA
2016-03-01 641-640-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F IOWA FALLS IA
2016-03-01 641-812-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 HAMPTON IA
2016-02-22 641-670-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F OSKALOOSA IA
2016-02-22 641-670-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F OSKALOOSA IA
2016-02-16 641-201-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F MASON CITY IA
2016-02-16 641-201-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F MASON CITY IA
2016-02-16 641-450-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F MASON CITY IA
2016-02-16 641-450-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F MASON CITY IA
2016-02-16 641-638-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F OSKALOOSA IA
2016-02-16 641-638-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F OSKALOOSA IA
2016-02-09 641-223-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OSCEOLA IA
2016-01-22 641-637-6XXX 6000–6999Assigned MAHASKA COMMUNICATION GROUP, LLC - IA 916A NEW SHARON IA
2016-01-22 641-933-6XXX 6000–6999Assigned MAHASKA COMMUNICATION GROUP, LLC - IA 916A FREMONT IA
2016-01-19 641-969-6XXX 6000–6999Assigned MAHASKA COMMUNICATION GROUP, LLC - IA 916A EDDYVILLE IA
2015-12-21 641-220-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CHARLES CY IA
2015-12-21 641-451-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 FAIRFIELD IA
2015-12-16 641-205-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IA 6266 KNOXVILLE IA
2015-12-16 641-450-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MASON CITY IA
2015-11-23 641-814-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F OTTUMWA IA
2015-11-23 641-847-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F ACKLEY IA
2015-11-19 641-903-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MASON CITY IA
2015-10-13 641-860-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E BRITT IA
2015-10-09 641-980-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 OTTUMWA IA
2015-09-15 641-231-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CLEAR LAKE IA
2015-09-14 641-832-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 OSAGE IA
2015-09-11 641-229-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 NEWHAMPTON IA
2015-09-08 641-230-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PELLA IA
2015-09-02 641-217-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IA 6266 CHARITON IA
2015-08-06 641-638-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 OSKALOOSA IA
2015-07-23 641-328-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MARSHALLTN IA
2015-07-06 641-451-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FAIRFIELD IA
2015-06-29 641-212-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 GREENFIELD IA
2015-06-29 641-557-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 NEWHAMPTON IA
2015-06-29 641-599-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 ST ANSGAR IA
2015-06-29 641-659-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 GRINNELL IA
2015-06-29 641-819-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 FAIRFIELD IA
2015-06-23 641-260-2XXX 2000–2999Assigned AUREON COMMUNICATIONS, LLC 444G GRINNELL 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.