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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2012-11-15 641-715-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F CHARLES CY IA
2012-11-15 641-715-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F CHARLES CY IA
2012-11-15 641-812-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F HAMPTON IA
2012-11-15 641-812-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F HAMPTON IA
2012-11-15 641-832-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F OSAGE IA
2012-11-15 641-832-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F OSAGE IA
2012-11-15 641-863-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F BRITT IA
2012-11-15 641-863-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F BRITT IA
2012-11-15 641-863-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F BRITT IA
2012-11-07 641-242-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 BLOOMFIELD IA
2012-10-24 641-781-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 NEWTON IA
2012-10-24 641-781-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 NEWTON IA
2012-09-24 641-231-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 CLEAR LAKE IA
2012-09-20 641-530-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MASON CITY IA
2012-07-12 641-217-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 CHARITON IA
2012-06-28 641-201-8XXX 8000–8999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F MASON CITY IA
2012-06-14 641-954-8XXX 8000–8999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F OTTUMWA IA
2012-05-15 641-243-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 MASON CITY IA
2012-04-04 641-352-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MARSHALLTN IA
2012-03-30 641-843-0XXX 0000–0999Assigned COMMUNICATIONS 1 NETWORK, INC. - IA 842E BRITT IA
2012-03-14 641-858-7XXX 7000–7999Assigned UNITED STATES CELLULAR - IA 6266 ELDORA IA
2012-02-23 641-925-1XXX 1000–1999Assigned COMMUNICATIONS 1 NETWORK, INC. - IA 842E GARNER IA
2012-02-22 641-208-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 BLOOMFIELD IA
2012-02-14 641-243-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 MASON CITY IA
2012-01-31 641-452-8XXX 8000–8999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 UNIONVILLE IA
2012-01-31 641-647-8XXX 8000–8999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 MYSTIC IA
2012-01-31 641-658-8XXX 8000–8999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 CINCINNATI IA
2012-01-31 641-724-8XXX 8000–8999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 MORAVIA IA
2012-01-31 641-726-2XXX 2000–2999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 MELROSE IA
2012-01-31 641-766-3XXX 3000–3999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 LUCAS IA
2012-01-31 641-898-8XXX 8000–8999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 SEYMOUR IA
2012-01-31 641-931-1XXX 1000–1999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 ALBIA IA
2012-01-19 641-841-4XXX 4000–4999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 NEWTON IA
2012-01-12 641-217-4XXX 4000–4999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 CHARITON IA
2012-01-12 641-278-4XXX 4000–4999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 CRESTON IA
2012-01-12 641-772-2XXX 2000–2999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 TINGLEY IA
2012-01-12 641-783-3XXX 3000–3999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 KELLERTON IA
2012-01-12 641-943-4XXX 4000–4999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 ATTICA IA
2012-01-12 641-946-3XXX 3000–3999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 LOVILIA IA
2012-01-12 641-949-2XXX 2000–2999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 TRACY IA
2012-01-11 641-323-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E NORTHWOOD IA
2012-01-11 641-454-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E MANLY IA
2011-12-28 641-458-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E GENEVA IA
2011-11-29 641-954-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 OTTUMWA IA
2011-11-16 641-847-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E ACKLEY IA
2011-11-15 641-847-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F ACKLEY IA
2011-11-14 641-223-3XXX 3000–3999Assigned UNITED STATES CELLULAR - IA 6266 OSCEOLA IA
2011-10-28 641-732-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E OSAGE IA
2011-10-19 641-481-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 TOLEDO IA
2011-10-04 641-278-8XXX 8000–8999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 CRESTON 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.