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
2016-11-28 872-304-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 CHICGOZN03 IL
2016-09-27 872-254-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C CHICGOZN08 IL
2016-09-20 872-769-1XXX 1000–1999Assigned ACCESS ONE, INC. - IL 5447 CHICGOZN06 IL
2016-09-15 872-760-1XXX 1000–1999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN10 IL
2016-09-15 872-769-9XXX 9000–9999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN06 IL
2016-09-08 872-804-0XXX 0000–0999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN02 IL
2016-08-29 872-240-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2016-08-09 872-204-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN08 IL
2016-08-09 872-204-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN08 IL
2016-07-28 872-762-0XXX 0000–0999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN06 IL
2016-07-27 872-760-0XXX 0000–0999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN10 IL
2016-07-26 872-763-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN06 IL
2016-07-26 872-763-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN06 IL
2016-07-22 872-769-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN06 IL
2016-07-21 872-254-0XXX 0000–0999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN08 IL
2016-07-19 872-757-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN07 IL
2016-07-13 872-310-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2016-07-13 872-310-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2016-07-13 872-310-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2016-07-13 872-757-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2016-07-13 872-757-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2016-07-11 872-204-8XXX 8000–8999Assigned IP HORIZON LLC 515J CHICGOZN08 IL
2016-07-11 872-204-9XXX 9000–9999Assigned IP HORIZON LLC 515J CHICGOZN08 IL
2016-07-11 872-231-7XXX 7000–7999Assigned IP HORIZON LLC 515J CHICGOZN05 IL
2016-07-11 872-231-8XXX 8000–8999Assigned IP HORIZON LLC 515J CHICGOZN05 IL
2016-07-11 872-281-9XXX 9000–9999Assigned IP HORIZON LLC 515J CHICGOZN06 IL
2016-07-11 872-772-2XXX 2000–2999Assigned IP HORIZON LLC 515J CHICGOZN04 IL
2016-07-11 872-772-3XXX 3000–3999Assigned IP HORIZON LLC 515J CHICGOZN04 IL
2016-07-11 872-903-8XXX 8000–8999Assigned IP HORIZON LLC 515J CHICGOZN09 IL
2016-07-11 872-903-9XXX 9000–9999Assigned IP HORIZON LLC 515J CHICGOZN09 IL
2016-07-08 872-219-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2016-07-08 872-219-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2016-07-08 872-219-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2016-07-08 872-724-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2016-07-08 872-904-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2016-06-30 872-219-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J CHICGOZN07 IL
2016-06-30 872-219-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J CHICGOZN07 IL
2016-06-30 872-724-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J CHICGOZN07 IL
2016-06-30 872-724-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J CHICGOZN07 IL
2016-06-30 872-724-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J CHICGOZN07 IL
2016-06-30 872-724-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J CHICGOZN07 IL
2016-06-30 872-724-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J CHICGOZN07 IL
2016-06-30 872-724-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J CHICGOZN07 IL
2016-06-30 872-724-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J CHICGOZN07 IL
2016-06-30 872-724-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J CHICGOZN07 IL
2016-06-22 872-772-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN04 IL
2016-06-15 872-231-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C CHICGOZN05 IL
2016-06-14 872-395-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN10 IL
2016-04-11 872-843-0XXX 0000–0999Assigned ILLINOIS BELL TEL CO 9329 CHICGOZN04 IL
2016-04-11 872-843-1XXX 1000–1999Assigned ILLINOIS BELL TEL CO 9329 CHICGOZN04 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.