NumberResearch Membership · Data 09/26/2026

Recent thousands-block assignments

68 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/26/2026

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
T-MOBILE USA, INC. 68
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
2017-10-19 316-223-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 WICHITA KS
2017-10-19 316-223-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WICHITA KS
2017-10-19 316-779-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WICHITA KS
2017-10-19 316-779-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WICHITA KS
2017-10-19 316-932-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 WICHITA KS
2017-10-19 316-932-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 WICHITA KS
2017-10-19 573-550-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FULTON MO
2017-10-13 830-262-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MARBLE FLS TX
2017-10-12 682-258-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WEATHERFD TX
2017-10-11 830-201-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MARBLE FLS TX
2017-10-11 928-225-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FLAGSTAFF AZ
2017-10-10 217-790-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHARLESTON IL
2017-10-10 217-790-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHARLESTON IL
2017-10-10 217-790-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHARLESTON IL
2017-10-10 831-400-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SANTA CRUZ CA
2017-10-06 858-914-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RNCHOSANFE CA
2017-10-02 312-200-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2017-10-02 312-200-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2017-10-02 312-200-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2017-10-02 541-880-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KLAMATHFLS OR
2017-10-02 702-861-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LAUGHLIN NV
2017-09-29 503-374-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TILLAMOOK OR
2017-09-29 503-374-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TILLAMOOK OR
2017-09-29 541-360-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CORVALLIS OR
2017-09-28 435-314-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EPHRAIM UT
2017-09-28 708-615-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MAYWOOD IL
2017-09-28 708-615-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MAYWOOD IL
2017-09-28 708-615-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MAYWOOD IL
2017-09-28 708-615-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MAYWOOD IL
2017-09-28 708-615-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MAYWOOD IL
2017-09-28 708-850-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CICERO IL
2017-09-28 708-943-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CICERO IL
2017-09-28 708-943-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CICERO IL
2017-09-28 708-970-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BELLWOOD IL
2017-09-28 708-970-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELLWOOD IL
2017-09-28 708-970-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLWOOD IL
2017-09-28 708-970-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLWOOD IL
2017-09-28 708-970-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLWOOD IL
2017-09-27 682-260-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 GRANBURY TX
2017-09-27 682-719-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 GRANBURY TX
2017-09-26 669-278-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CAMPBELL CA
2017-09-26 858-209-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DEL MAR CA
2017-09-26 949-316-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 IRVINE CA
2017-09-22 503-744-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CLACKAMAS OR
2017-09-22 682-375-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ARLINGTON TX
2017-09-22 682-386-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARLINGTON TX
2017-09-22 682-718-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ARLINGTON TX
2017-09-22 707-683-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EUREKA CA
2017-09-22 707-714-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 UKIAH CA
2017-09-21 626-366-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.