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
2018-10-11 641-221-6XXX 6000–6999Assigned AUREON COMMUNICATIONS, LLC 444G GREENFIELD IA
2018-10-11 641-337-6XXX 6000–6999Assigned AUREON COMMUNICATIONS, LLC 444G ORIENT IA
2018-09-19 641-354-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARSHALLTN IA
2018-09-12 641-200-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 CHARLES CY IA
2018-09-12 641-670-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 OSKALOOSA IA
2018-09-05 641-387-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 TOLEDO IA
2018-08-09 641-417-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 NEWTON IA
2018-08-09 641-417-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 NEWTON IA
2018-08-09 641-417-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 NEWTON IA
2018-08-09 641-781-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 NEWTON IA
2018-08-09 641-781-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 NEWTON IA
2018-07-31 641-548-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MASON CITY IA
2018-07-30 641-384-9XXX 9000–9999Assigned METROPCS, INC. 5562 BELMOND IA
2018-07-27 641-387-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TOLEDO IA
2018-07-27 641-387-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TOLEDO IA
2018-07-27 641-387-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TOLEDO IA
2018-07-27 641-387-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TOLEDO IA
2018-07-27 641-528-0XXX 0000–0999Assigned METROPCS, INC. 5562 MALCOM IA
2018-07-27 641-710-6XXX 6000–6999Assigned METROPCS, INC. 5562 STACYVILLE IA
2018-07-20 641-630-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E HAMPTON IA
2018-07-18 641-317-3XXX 3000–3999Assigned METROPCS, INC. 5562 KANAWHA IA
2018-07-18 641-372-3XXX 3000–3999Assigned METROPCS, INC. 5562 ROCKWELL IA
2018-07-18 641-473-4XXX 4000–4999Assigned METROPCS, INC. 5562 GLADBROOK IA
2018-07-18 641-705-5XXX 5000–5999Assigned METROPCS, INC. 5562 ELMA IA
2018-07-18 641-808-4XXX 4000–4999Assigned METROPCS, INC. 5562 COLO IA
2018-07-18 641-869-8XXX 8000–8999Assigned METROPCS, INC. 5562 WELLSBURG IA
2018-07-18 641-909-2XXX 2000–2999Assigned METROPCS, INC. 5562 LAKE MILLS IA
2018-07-16 641-351-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E MARSHALLTN IA
2018-07-13 641-354-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MARSHALLTN IA
2018-07-06 641-501-9XXX 9000–9999Assigned WINDSTREAM MONTEZUMA, LLC 1248 MONTEZUMA IA
2018-07-05 641-212-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GREENFIELD IA
2018-06-29 641-200-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CHARLES CY IA
2018-06-29 641-200-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CHARLES CY IA
2018-06-28 641-575-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 OTTUMWA IA
2018-06-22 641-575-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E OTTUMWA IA
2018-06-20 641-354-9XXX 9000–9999Assigned METROPCS, INC. 5562 MARSHALLTN IA
2018-06-20 641-630-9XXX 9000–9999Assigned METROPCS, INC. 5562 HAMPTON IA
2018-06-18 641-259-8XXX 8000–8999Assigned METROPCS, INC. 5562 MONROE IA
2018-06-18 641-289-9XXX 9000–9999Assigned METROPCS, INC. 5562 LAMONI IA
2018-06-18 641-381-8XXX 8000–8999Assigned METROPCS, INC. 5562 NORTHWOOD IA
2018-06-18 641-666-5XXX 5000–5999Assigned METROPCS, INC. 5562 OSAGE IA
2018-06-18 641-735-7XXX 7000–7999Assigned METROPCS, INC. 5562 BUFFALOCTR IA
2018-06-18 641-843-6XXX 6000–6999Assigned METROPCS, INC. 5562 BRITT IA
2018-06-18 641-892-2XXX 2000–2999Assigned METROPCS, INC. 5562 SHEFFIELD IA
2018-06-15 641-432-3XXX 3000–3999Assigned METROPCS, INC. 5562 FORESTCITY IA
2018-06-15 641-557-2XXX 2000–2999Assigned METROPCS, INC. 5562 NEWHAMPTON IA
2018-06-15 641-925-5XXX 5000–5999Assigned METROPCS, INC. 5562 GARNER IA
2018-06-13 641-670-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 OSKALOOSA IA
2018-06-08 641-387-7XXX 7000–7999Assigned METROPCS, INC. 5562 TOLEDO IA
2018-06-08 641-426-7XXX 7000–7999Assigned METROPCS, INC. 5562 CHARLES CY 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.