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
2013-11-01 872-303-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN07 IL
2013-10-18 872-235-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN02 IL
2013-10-18 872-235-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN02 IL
2013-10-15 872-222-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2013-10-15 872-222-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2013-10-15 872-802-2XXX 2000–2999Assigned ACCESS ONE, INC. - IL 5447 CHICGOZN04 IL
2013-10-11 872-701-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-10-11 872-701-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-10-11 872-701-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-10-11 872-701-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-10-11 872-701-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-10-11 872-703-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-10-03 872-802-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2013-10-03 872-802-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2013-10-03 872-802-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2013-10-03 872-802-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2013-10-03 872-802-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2013-10-02 872-234-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-10-02 872-234-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-10-02 872-234-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-10-02 872-234-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-10-02 872-234-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-10-02 872-234-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-10-02 872-238-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-10-02 872-806-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2013-10-02 872-806-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2013-10-02 872-806-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2013-10-02 872-806-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2013-10-02 872-806-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2013-10-02 872-806-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2013-10-02 872-806-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2013-10-02 872-808-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2013-10-02 872-808-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2013-10-02 872-808-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2013-10-02 872-808-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2013-10-02 872-808-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2013-10-02 872-808-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2013-09-25 872-235-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2013-09-25 872-235-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2013-09-25 872-235-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2013-09-25 872-235-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2013-09-09 872-666-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN09 IL
2013-07-29 872-210-6XXX 6000–6999Assigned IP HORIZON LLC 515J CHICGOZN04 IL
2013-07-29 872-244-9XXX 9000–9999Assigned IP HORIZON LLC 515J CHICGOZN07 IL
2013-07-29 872-803-0XXX 0000–0999Assigned IP HORIZON LLC 515J CHICGOZN10 IL
2013-07-11 872-244-6XXX 6000–6999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2013-07-10 872-210-5XXX 5000–5999Assigned ONVOY, LLC 224C CHICGOZN04 IL
2013-07-10 872-213-7XXX 7000–7999Assigned ONVOY, LLC 224C CHICGOZN02 IL
2013-07-10 872-239-3XXX 3000–3999Assigned ONVOY, LLC 224C CHICGOZN06 IL
2013-07-10 872-240-5XXX 5000–5999Assigned ONVOY, LLC 224C CHICGOZN03 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.