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
2017-02-15 641-936-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DOUDS IA
2017-02-09 641-216-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CENTERVL IA
2017-02-09 641-217-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHARITON IA
2017-02-09 641-369-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BRIDGEWTR IA
2017-02-09 641-489-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHELSEA IA
2017-02-09 641-658-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CINCINNATI IA
2017-02-09 641-715-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHARLES CY IA
2017-02-09 641-860-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BRITT IA
2017-02-09 641-935-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHILLICOTH IA
2017-02-09 641-944-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BUSSEY IA
2017-02-03 641-832-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OSAGE IA
2017-01-20 641-781-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 NEWTON IA
2017-01-05 641-557-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 NEWHAMPTON IA
2016-12-07 641-205-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KNOXVILLE IA
2016-12-07 641-325-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GRINNELL IA
2016-12-06 641-244-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 OTTUMWA IA
2016-11-21 641-670-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 OSKALOOSA IA
2016-10-17 641-231-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CLEAR LAKE IA
2016-09-30 641-450-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MASON CITY IA
2016-09-15 641-969-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EDDYVILLE IA
2016-09-07 641-640-3XXX 3000–3999Assigned AUREON COMMUNICATIONS, LLC 444G IOWA FALLS IA
2016-09-06 641-307-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 GUTHRIECTR IA
2016-08-17 641-316-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 IOWA FALLS IA
2016-08-03 641-244-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OTTUMWA IA
2016-08-03 641-672-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OSKALOOSA IA
2016-07-29 641-432-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 FORESTCITY IA
2016-07-14 641-572-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 LEON IA
2016-07-14 641-640-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 IOWA FALLS IA
2016-06-24 641-854-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARSHALLTN IA
2016-06-22 641-854-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F MARSHALLTN IA
2016-06-21 641-323-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E NORTHWOOD IA
2016-06-20 641-435-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E NASHUA IA
2016-06-03 641-201-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MASON CITY IA
2016-06-02 641-244-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OTTUMWA IA
2016-05-24 641-651-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PELLA IA
2016-05-06 641-840-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 NEWTON IA
2016-04-27 641-231-5XXX 5000–5999Assigned UNITED STATES CELLULAR - IA 6266 CLEAR LAKE IA
2016-04-21 641-781-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 NEWTON IA
2016-03-22 641-903-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MASON CITY IA
2016-03-21 641-552-8XXX 8000–8999Assigned OMNITEL COMMUNICATIONS, INC. - IA 3620 CHARLES CY IA
2016-03-21 641-552-9XXX 9000–9999Assigned OMNITEL COMMUNICATIONS, INC. - IA 3620 CHARLES CY IA
2016-03-18 641-860-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F BRITT IA
2016-03-18 641-860-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F BRITT IA
2016-03-17 641-454-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F MANLY IA
2016-03-17 641-454-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F MANLY IA
2016-03-16 641-435-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F NASHUA IA
2016-03-16 641-435-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F NASHUA IA
2016-03-16 641-632-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F ROSE HILL IA
2016-03-16 641-632-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F ROSE HILL IA
2016-03-15 641-812-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F HAMPTON 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.