NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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 773
ONVOY, LLC 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
2021-12-08 773-942-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN02 IL
2021-11-24 773-261-8XXX 8000–8999Assigned ONVOY, LLC 224C CHICGOZN05 IL
2021-11-24 773-836-0XXX 0000–0999Assigned ONVOY, LLC 224C CHICGOZN05 IL
2021-11-24 773-836-2XXX 2000–2999Assigned ONVOY, LLC 224C CHICGOZN05 IL
2021-11-03 773-955-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2021-10-13 773-696-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN06 IL
2021-10-13 773-902-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN09 IL
2021-10-13 773-902-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN09 IL
2021-10-13 773-913-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN09 IL
2021-10-13 773-913-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN09 IL
2021-10-13 773-913-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN09 IL
2021-10-13 773-913-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN09 IL
2021-10-13 773-920-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN06 IL
2021-09-29 773-280-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2021-09-29 773-349-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2021-09-29 773-521-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2021-09-29 773-542-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2021-09-29 773-542-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2021-09-29 773-638-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2021-09-29 773-757-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2021-09-29 773-762-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2021-09-29 773-800-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN02 IL
2021-09-29 773-801-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2021-09-29 773-823-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2021-09-29 773-827-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2021-09-29 773-827-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2021-09-29 773-827-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2021-09-29 773-893-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2021-09-24 773-840-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN10 IL
2021-09-22 773-654-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN02 IL
2021-09-20 773-373-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2021-09-20 773-483-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2021-09-20 773-487-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2021-09-20 773-493-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2021-09-20 773-538-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2021-09-20 773-684-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2021-09-20 773-684-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2021-09-20 773-684-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2021-09-07 773-302-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2021-09-07 773-302-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2021-09-07 773-312-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2021-09-07 773-433-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2021-09-07 773-739-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2021-09-07 773-739-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2021-09-07 773-828-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2021-09-07 773-977-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2021-09-07 773-977-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2021-09-07 773-997-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2021-09-07 773-997-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2021-09-07 773-997-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.