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
2018-03-20 641-244-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F OTTUMWA IA
2018-03-19 641-324-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F NORTHWOOD IA
2018-03-14 641-632-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F ROSE HILL IA
2018-03-14 641-819-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 FAIRFIELD IA
2018-03-14 641-819-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 FAIRFIELD IA
2018-03-14 641-863-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F BRITT IA
2018-03-13 641-230-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PELLA IA
2018-03-13 641-230-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PELLA IA
2018-03-13 641-260-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 GRINNELL IA
2018-03-13 641-260-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 GRINNELL IA
2018-03-13 641-871-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 KNOXVILLE IA
2018-03-13 641-871-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 KNOXVILLE IA
2018-03-12 641-569-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 OSKALOOSA IA
2018-03-12 641-569-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 OSKALOOSA IA
2018-03-12 641-924-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 GARNER IA
2018-03-06 641-548-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MASON CITY IA
2018-03-06 641-808-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 COLO IA
2018-03-06 641-808-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 COLO IA
2018-03-05 641-481-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TOLEDO IA
2018-03-05 641-481-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TOLEDO IA
2018-03-02 641-381-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 NORTHWOOD IA
2018-03-02 641-541-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SIGOURNEY IA
2018-03-02 641-557-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 NEWHAMPTON IA
2018-03-02 641-666-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 OSAGE IA
2018-03-02 641-909-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LAKE MILLS IA
2018-03-01 641-202-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CRESTON IA
2018-03-01 641-231-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CLEAR LAKE IA
2018-03-01 641-231-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CLEAR LAKE IA
2018-03-01 641-242-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BLOOMFIELD IA
2018-03-01 641-244-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 OTTUMWA IA
2018-03-01 641-244-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 OTTUMWA IA
2018-03-01 641-432-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 FORESTCITY IA
2018-03-01 641-432-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 FORESTCITY IA
2018-03-01 641-444-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELMOND IA
2018-03-01 641-450-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MASON CITY IA
2018-03-01 641-531-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 IOWA FALLS IA
2018-03-01 641-531-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 IOWA FALLS IA
2018-03-01 641-631-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHARLES CY IA
2018-03-01 641-631-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHARLES CY IA
2018-03-01 641-800-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ACKLEY IA
2018-03-01 641-849-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ELDORA IA
2018-03-01 641-849-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ELDORA IA
2018-03-01 641-854-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MARSHALLTN IA
2018-03-01 641-854-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MARSHALLTN IA
2018-03-01 641-860-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BRITT IA
2018-02-20 641-800-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F ACKLEY IA
2018-02-20 641-800-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F ACKLEY IA
2018-02-20 641-999-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F NASHUA IA
2018-02-05 641-525-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CLEAR LAKE IA
2018-01-31 641-381-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F NORTHWOOD 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.