NumberResearch Membership · Data 09/27/2026

Recent thousands-block assignments

68 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/27/2026

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
2015-01-20 219-318-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 GARY IN
2015-01-20 219-318-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 GARY IN
2015-01-20 219-318-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 GARY IN
2015-01-20 424-385-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CULVERCITY CA
2015-01-20 872-731-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2015-01-20 872-731-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2015-01-20 872-731-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2015-01-20 872-731-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2015-01-20 872-731-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2015-01-20 872-731-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2015-01-19 209-289-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MODESTO CA
2015-01-19 323-348-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 12 CA
2015-01-19 510-753-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OKLD TRNID CA
2015-01-19 541-801-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ALBANY OR
2015-01-19 562-846-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 WHITTIER CA
2015-01-19 707-641-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 VALLEJO CA
2015-01-19 858-832-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 RNCHOSANFE CA
2015-01-19 949-434-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SADLBK VLY CA
2015-01-19 971-601-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEASIDE OR
2015-01-19 971-716-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MCMINNVL OR
2015-01-16 213-352-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2015-01-16 213-352-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2015-01-16 224-830-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2015-01-16 224-830-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2015-01-16 385-445-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2015-01-16 385-445-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2015-01-16 385-445-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2015-01-16 479-573-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 FORT SMITH AR
2015-01-16 479-831-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 FORT SMITH AR
2015-01-16 479-831-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 FORT SMITH AR
2015-01-16 505-339-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 GALLUP NM
2015-01-16 510-944-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2015-01-16 510-944-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2015-01-16 520-265-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BENSON AZ
2015-01-16 530-813-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MARYSVILLE CA
2015-01-16 559-942-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CARUTHERS CA
2015-01-16 559-942-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CARUTHERS CA
2015-01-16 562-241-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ALAMITOS CA
2015-01-16 657-256-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CYPRESS CA
2015-01-16 657-256-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CYPRESS CA
2015-01-16 657-262-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2015-01-16 657-262-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2015-01-16 657-262-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2015-01-16 657-282-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ORANGE CA
2015-01-16 657-282-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ORANGE CA
2015-01-16 909-352-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MARSHALL CA
2015-01-16 916-430-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2015-01-16 916-430-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2015-01-16 972-267-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 DALLAS TX
2015-01-14 208-809-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BOISE ID

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.