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
2023-07-13 641-277-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F OTTUMWA IA
2023-07-13 641-508-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 OSCEOLA IA
2023-07-13 641-516-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F MARSHALLTN IA
2023-07-13 641-516-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F MARSHALLTN IA
2023-07-13 641-516-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F MARSHALLTN IA
2023-07-13 641-516-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F MARSHALLTN IA
2023-07-13 641-516-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F MARSHALLTN IA
2023-07-13 641-821-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F GRINNELL IA
2023-07-05 641-671-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IA 6266 LENOX IA
2023-06-27 641-508-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F OSCEOLA IA
2023-05-24 641-373-5XXX 5000–5999Assigned UNITED STATES CELLULAR - IA 6266 IOWA FALLS IA
2023-05-12 641-516-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MARSHALLTN IA
2023-05-11 641-302-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J RHODES IA
2023-04-27 641-229-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IA 6266 NEWHAMPTON IA
2023-04-07 641-210-3XXX 3000–3999Assigned COMMIO, LLC 939H MASON CITY IA
2023-03-31 641-916-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J ST CHARLES IA
2023-03-28 641-923-8XXX 8000–8999Assigned TERRA NOVA TELECOM INC. 145J GARNER IA
2023-02-01 641-436-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F CENTERVL IA
2022-12-15 641-222-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 BRITT IA
2022-12-15 641-250-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MANLY IA
2022-12-15 641-254-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 NASHUA IA
2022-12-15 641-266-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 ACKLEY IA
2022-12-15 641-334-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 ROSE HILL IA
2022-11-07 641-671-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 LENOX IA
2022-10-20 641-448-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F MELCHER IA
2022-10-17 641-252-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DUMONT IA
2022-09-16 641-261-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TOLEDO IA
2022-09-16 641-261-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TOLEDO IA
2022-09-16 641-261-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TOLEDO IA
2022-09-16 641-261-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TOLEDO IA
2022-09-06 641-205-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KNOXVILLE IA
2022-08-26 641-437-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 CENTERVL IA
2022-08-11 641-575-6XXX 6000–6999Assigned MAHASKA COMMUNICATION GROUP, LLC - IA 916A OTTUMWA IA
2022-07-29 641-290-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J MILO IA
2022-07-29 641-385-8XXX 8000–8999Assigned BOOST SUBSCRIBERCO L.L.C. 490J COLLINS IA
2022-07-29 641-417-7XXX 7000–7999Assigned BOOST SUBSCRIBERCO L.L.C. 490J NEWTON IA
2022-07-29 641-500-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA FALLS IA
2022-07-29 641-764-3XXX 3000–3999Assigned BOOST SUBSCRIBERCO L.L.C. 490J MARTENSDL IA
2022-07-29 641-955-8XXX 8000–8999Assigned BOOST SUBSCRIBERCO L.L.C. 490J MONROE IA
2022-07-28 641-268-1XXX 1000–1999Assigned AUREON COMMUNICATIONS, LLC 444G LACONA IA
2022-07-26 641-451-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F FAIRFIELD IA
2022-07-26 641-529-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CLEAR LAKE IA
2022-07-19 641-255-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E MASON CITY IA
2022-07-15 641-255-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E MASON CITY IA
2022-07-08 641-207-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F KEOTA IA
2022-06-28 641-208-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 BLOOMFIELD IA
2022-06-28 641-475-8XXX 8000–8999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F HAVERHILL IA
2022-06-28 641-476-8XXX 8000–8999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F LAUREL IA
2022-06-28 641-478-8XXX 8000–8999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F FERGUSON IA
2022-06-28 641-488-8XXX 8000–8999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F ALBION 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.