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
2011-08-18 415-937-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2011-08-18 575-689-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CARLSBAD NM
2011-08-18 720-789-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2011-08-18 720-789-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2011-08-18 720-789-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2011-08-18 720-789-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2011-08-18 775-400-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CARSONCITY NV
2011-08-17 209-643-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ATWATER CA
2011-08-17 217-565-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TAYLORVL IL
2011-08-17 217-994-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EFFINGHAM IL
2011-08-17 562-387-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ALAMITOS CA
2011-08-17 630-478-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ELMHURST IL
2011-08-17 630-478-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELMHURST IL
2011-08-17 630-501-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ELMHURST IL
2011-08-17 630-501-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELMHURST IL
2011-08-17 779-233-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2011-08-17 779-233-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2011-08-17 779-233-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2011-08-17 779-233-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2011-08-17 779-233-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2011-08-17 779-233-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2011-08-17 779-233-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2011-08-16 224-400-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2011-08-16 314-475-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-08-16 314-475-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-08-16 563-241-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CLINTON IA
2011-08-16 870-562-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MAGNOLIA AR
2011-08-16 872-444-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2011-08-16 872-444-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2011-08-15 408-708-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNJS NORTH CA
2011-08-15 501-400-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-08-15 501-444-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-08-15 501-444-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-08-15 501-588-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-08-15 501-693-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 HOTSPRINGS AR
2011-08-15 501-693-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 HOTSPRINGS AR
2011-08-15 501-708-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-08-15 530-718-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUBN MAIN CA
2011-08-15 702-690-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2011-08-15 702-690-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2011-08-15 702-690-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2011-08-15 702-690-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2011-08-15 805-332-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SANTAMARIA CA
2011-08-15 805-332-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SANTAMARIA CA
2011-08-15 918-644-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2011-08-15 918-644-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2011-08-15 918-644-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2011-08-15 918-644-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2011-08-15 918-644-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2011-08-15 918-644-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TULSA OK

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.