NumberResearch Membership · Data 09/23/2026

Recent thousands-block assignments

59 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/23/2026

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. 59
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
2007-07-18 503-200-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2007-07-18 559-416-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MADERA CA
2007-07-18 707-501-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 NAPA CA
2007-07-18 714-759-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CYPRESS CA
2007-07-18 775-217-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FALLON NV
2007-07-18 909-436-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ARROWHEAD CA
2007-07-18 909-643-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 POMONA CA
2007-07-18 916-903-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 FAIR OAKS CA
2007-07-18 925-237-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2007-07-18 949-610-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 NEWPORTBCH CA
2007-07-17 208-562-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BOISE ID
2007-07-17 210-548-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2007-07-17 210-548-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2007-07-17 210-548-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2007-07-17 219-671-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CROWNPOINT IN
2007-07-17 312-730-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2007-07-17 312-730-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2007-07-17 312-929-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2007-07-17 312-929-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2007-07-17 314-226-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2007-07-17 314-556-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2007-07-17 314-556-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2007-07-17 314-556-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2007-07-17 314-933-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2007-07-17 314-933-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2007-07-17 330-949-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CANTON OH
2007-07-17 425-368-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2007-07-17 440-453-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ELYRIA OH
2007-07-17 509-305-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SUNNYSIDE WA
2007-07-17 509-305-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SUNNYSIDE WA
2007-07-17 510-283-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2007-07-17 513-693-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2007-07-17 513-693-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2007-07-17 513-693-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2007-07-17 513-693-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2007-07-17 559-403-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CARUTHERS CA
2007-07-17 562-417-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 DOWNEY CA
2007-07-17 573-529-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2007-07-17 619-502-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHULAVISTA CA
2007-07-17 630-397-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 GENEVA IL
2007-07-17 630-613-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LOMBARD IL
2007-07-17 636-395-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ST CHARLES MO
2007-07-17 636-395-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ST CHARLES MO
2007-07-17 661-208-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2007-07-17 801-505-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2007-07-17 801-505-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2007-07-17 831-663-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SALINAS CA
2007-07-17 909-246-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 S BERNDINO CA
2007-07-17 915-356-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 EL PASO TX
2007-07-17 951-992-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MORENO CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.