NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

9 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 872
NEW CINGULAR WIRELESS PCS, LLC - IL 8
8X8, INC. 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
2013-05-15 872-221-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN09 IL
2013-05-15 872-666-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN09 IL
2013-05-03 872-803-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-05-03 872-803-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-05-03 872-803-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-05-03 872-803-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-05-03 872-803-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-05-03 872-803-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-05-03 872-803-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-05-03 872-803-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-05-02 872-801-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-04-29 872-210-1XXX 1000–1999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN04 IL
2013-04-29 872-253-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-04-29 872-301-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-04-29 872-301-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-04-22 872-210-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2013-04-22 872-210-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2013-04-22 872-210-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2013-04-22 872-214-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2013-04-22 872-214-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2013-04-22 872-301-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-04-22 872-301-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-04-22 872-301-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-04-22 872-301-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-04-12 872-356-4XXX 4000–4999Assigned ONVOY, LLC 224C CHICGOZN10 IL
2013-04-12 872-356-7XXX 7000–7999Assigned ONVOY, LLC 224C CHICGOZN10 IL
2013-04-12 872-356-9XXX 9000–9999Assigned ONVOY, LLC 224C CHICGOZN10 IL
2013-04-12 872-395-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-04-12 872-639-2XXX 2000–2999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2013-04-12 872-639-4XXX 4000–4999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2013-04-12 872-639-5XXX 5000–5999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2013-04-12 872-829-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2013-04-09 872-205-8XXX 8000–8999Assigned IP HORIZON LLC 515J CHICGOZN06 IL
2013-04-09 872-999-1XXX 1000–1999Assigned IP HORIZON LLC 515J CHICGOZN02 IL
2013-04-04 872-208-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN02 IL
2013-04-04 872-208-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN02 IL
2013-04-04 872-829-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN04 IL
2013-04-04 872-829-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN04 IL
2013-04-03 872-253-0XXX 0000–0999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN08 IL
2013-04-03 872-253-1XXX 1000–1999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN08 IL
2013-04-03 872-484-0XXX 0000–0999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN03 IL
2013-04-03 872-484-1XXX 1000–1999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN03 IL
2013-04-03 872-666-8XXX 8000–8999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN09 IL
2013-04-03 872-666-9XXX 9000–9999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN09 IL
2013-04-03 872-777-8XXX 8000–8999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN07 IL
2013-04-03 872-777-9XXX 9000–9999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN07 IL
2013-04-03 872-829-0XXX 0000–0999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN04 IL
2013-04-03 872-829-1XXX 1000–1999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN04 IL
2013-03-19 872-209-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-03-19 872-209-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL

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.