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
2022-06-20 641-200-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CHARLES CY IA
2022-06-20 641-255-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E MASON CITY IA
2022-05-05 641-643-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F MALCOM IA
2022-04-28 641-255-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MASON CITY IA
2022-04-28 641-261-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TOLEDO IA
2022-04-28 641-261-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TOLEDO IA
2022-04-28 641-261-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TOLEDO IA
2022-04-18 641-289-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 LAMONI IA
2022-04-18 641-572-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 LEON IA
2022-03-25 641-776-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J CHARITON IA
2022-03-23 641-327-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J WELLSBURG IA
2022-03-23 641-626-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J LEIGHTON IA
2022-03-14 641-222-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J BRITT IA
2022-03-14 641-668-8XXX 8000–8999Assigned TON80 COMMUNICATIONS, LLC 516J BUSSEY IA
2022-03-10 641-272-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J BRIDGEWTR IA
2022-03-09 641-260-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IA 6266 GRINNELL IA
2022-03-04 641-727-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J BLAKESBURG IA
2022-02-28 641-543-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J ALTA VISTA IA
2022-02-28 641-966-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J BLADENSBG IA
2022-02-24 641-837-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J ALBIA IA
2022-02-21 641-258-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J ADAIR IA
2022-02-21 641-266-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J ACKLEY IA
2022-02-01 641-508-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F OSCEOLA IA
2022-02-01 641-508-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F OSCEOLA IA
2022-01-26 641-508-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 OSCEOLA IA
2022-01-25 641-204-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 PELLA IA
2022-01-25 641-277-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 OTTUMWA IA
2022-01-25 641-321-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MOUNT AYR IA
2022-01-25 641-338-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 THAYER IA
2022-01-25 641-362-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CRESTON IA
2022-01-25 641-440-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CLEAR LAKE IA
2022-01-25 641-630-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 HAMPTON IA
2022-01-25 641-659-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 GRINNELL IA
2022-01-25 641-773-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDRIVER IA
2022-01-25 641-788-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BLOCKTON IA
2022-01-25 641-849-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 ELDORA IA
2022-01-16 641-219-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F CHARITON IA
2022-01-13 641-517-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OSKALOOSA IA
2021-12-29 641-219-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F CHARITON IA
2021-12-16 641-841-2XXX 2000–2999Assigned MAHASKA COMMUNICATION GROUP, LLC - IA 916A NEWTON IA
2021-12-13 641-207-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F KEOTA IA
2021-12-08 641-341-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F THORNTON IA
2021-12-03 641-252-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUMONT IA
2021-12-03 641-506-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ZEARING IA
2021-12-03 641-916-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ST CHARLES IA
2021-12-01 641-819-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 FAIRFIELD IA
2021-11-22 641-276-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H AGENCY IA
2021-11-22 641-909-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAKE MILLS IA
2021-11-19 641-327-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WELLSBURG IA
2021-11-19 641-356-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLADBROOK 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.