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
2021-09-07 872-664-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2021-09-07 872-899-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2021-09-07 872-899-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2021-09-07 872-899-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2021-08-23 872-279-2XXX 2000–2999Assigned ONVOY, LLC 224C CHICGOZN01 IL
2021-08-23 872-279-3XXX 3000–3999Assigned ONVOY, LLC 224C CHICGOZN01 IL
2021-08-18 872-287-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN03 IL
2021-08-18 872-287-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN03 IL
2021-08-18 872-287-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN03 IL
2021-08-18 872-762-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN06 IL
2021-08-18 872-899-9XXX 9000–9999Assigned FRACTEL, LLC 965H CHICGOZN01 IL
2021-08-12 872-664-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 CHICGOZN01 IL
2021-08-12 872-664-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 CHICGOZN01 IL
2021-08-04 872-275-1XXX 1000–1999Assigned COMMIO, LLC 939H CHICGOZN01 IL
2021-08-04 872-275-7XXX 7000–7999Assigned COMMIO, LLC 939H CHICGOZN01 IL
2021-08-04 872-275-8XXX 8000–8999Assigned COMMIO, LLC 939H CHICGOZN01 IL
2021-08-04 872-275-9XXX 9000–9999Assigned COMMIO, LLC 939H CHICGOZN01 IL
2021-08-04 872-284-0XXX 0000–0999Assigned COMMIO, LLC 939H CHICGOZN05 IL
2021-08-04 872-284-1XXX 1000–1999Assigned COMMIO, LLC 939H CHICGOZN05 IL
2021-08-04 872-284-7XXX 7000–7999Assigned COMMIO, LLC 939H CHICGOZN05 IL
2021-08-04 872-284-8XXX 8000–8999Assigned COMMIO, LLC 939H CHICGOZN05 IL
2021-08-04 872-285-0XXX 0000–0999Assigned COMMIO, LLC 939H CHICGOZN08 IL
2021-08-04 872-285-1XXX 1000–1999Assigned COMMIO, LLC 939H CHICGOZN08 IL
2021-08-04 872-285-2XXX 2000–2999Assigned COMMIO, LLC 939H CHICGOZN08 IL
2021-08-04 872-285-9XXX 9000–9999Assigned COMMIO, LLC 939H CHICGOZN08 IL
2021-08-03 872-287-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2021-08-03 872-287-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2021-08-03 872-287-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2021-08-02 872-271-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2021-08-02 872-271-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2021-07-28 872-286-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN09 IL
2021-07-27 872-262-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN09 IL
2021-07-27 872-262-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN09 IL
2021-07-26 872-261-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN10 IL
2021-07-26 872-758-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN10 IL
2021-07-26 872-758-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN10 IL
2021-07-26 872-758-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN10 IL
2021-07-19 872-275-2XXX 2000–2999Assigned ONVOY, LLC 224C CHICGOZN01 IL
2021-07-19 872-275-3XXX 3000–3999Assigned ONVOY, LLC 224C CHICGOZN01 IL
2021-07-19 872-275-4XXX 4000–4999Assigned ONVOY, LLC 224C CHICGOZN01 IL
2021-07-14 872-285-5XXX 5000–5999Assigned ONVOY, LLC 224C CHICGOZN08 IL
2021-07-14 872-285-6XXX 6000–6999Assigned ONVOY, LLC 224C CHICGOZN08 IL
2021-07-14 872-285-7XXX 7000–7999Assigned ONVOY, LLC 224C CHICGOZN08 IL
2021-07-14 872-285-8XXX 8000–8999Assigned ONVOY, LLC 224C CHICGOZN08 IL
2021-07-13 872-678-8XXX 8000–8999Assigned ONVOY, LLC 224C CHICGOZN11 IL
2021-07-08 872-271-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN03 IL
2021-07-08 872-273-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN03 IL
2021-06-24 872-283-3XXX 3000–3999Assigned VONAGE AMERICA LLC 197D CHICGOZN07 IL
2021-06-22 872-664-3XXX 3000–3999Assigned ONVOY, LLC 224C CHICGOZN01 IL
2021-06-22 872-664-4XXX 4000–4999Assigned ONVOY, LLC 224C CHICGOZN01 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.