NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 641
LEVEL 3 COMMUNICATIONS, LLC - IA 58
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
2026-04-22 641-306-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 THOMPSON IA
2026-03-04 641-881-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 LATIMER IA
2026-02-17 641-523-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CORYDON IA
2025-05-27 641-905-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MELBOURNE IA
2024-11-01 641-242-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 BLOOMFIELD IA
2023-11-13 641-366-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CONRAD 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
2022-10-17 641-252-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DUMONT 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
2022-01-26 641-508-4XXX 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
2022-01-25 641-362-7XXX 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
2022-01-25 641-849-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 ELDORA IA
2021-12-01 641-819-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 FAIRFIELD IA
2021-06-02 641-417-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 NEWTON IA
2021-05-18 641-432-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 FORESTCITY IA
2020-11-17 641-354-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MARSHALLTN IA
2020-10-28 641-820-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 KNOXVILLE IA
2020-04-29 641-300-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 OSAGE IA
2019-11-04 641-216-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CENTERVL IA
2019-11-04 641-217-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CHARITON IA
2019-11-04 641-931-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 ALBIA IA
2019-10-03 641-548-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MASON CITY IA
2019-09-16 641-390-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 NORTHWOOD IA
2019-09-09 641-215-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 OSKALOOSA IA
2019-09-05 641-925-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 GARNER IA
2017-11-01 641-210-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MASON CITY IA
2017-04-05 641-329-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 BAILEY IA
2017-02-28 641-212-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 GREENFIELD IA
2017-02-28 641-747-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 GUTHRIECTR IA
2017-02-24 641-481-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 TOLEDO IA
2017-02-23 641-541-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 SIGOURNEY IA
2017-02-22 641-557-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 NEWHAMPTON IA
2017-02-17 641-528-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MALCOM IA
2016-08-17 641-316-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 IOWA FALLS IA
2015-05-29 641-552-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CHARLES CY IA
2014-09-25 641-903-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MASON CITY IA
2014-02-04 641-552-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CHARLES CY IA
2013-07-23 641-672-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 OSKALOOSA IA
2013-05-29 641-243-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MASON CITY 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.