NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

76 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
T-MOBILE USA, INC. 76
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
AssignedBlockAssigneeOCNRate centerState
2022-11-22 623-291-8XXX T-MOBILE USA, INC. 6529 PHOENIX AZ
2022-11-22 623-291-9XXX T-MOBILE USA, INC. 6529 PHOENIX AZ
2022-11-22 720-978-0XXX T-MOBILE USA, INC. 6529 DENVER CO
2022-11-22 720-978-2XXX T-MOBILE USA, INC. 6529 DENVER CO
2022-11-22 720-978-3XXX T-MOBILE USA, INC. 6529 DENVER CO
2022-11-22 720-978-4XXX T-MOBILE USA, INC. 6529 DENVER CO
2022-11-22 720-978-5XXX T-MOBILE USA, INC. 6529 DENVER CO
2022-11-22 720-978-6XXX T-MOBILE USA, INC. 6529 DENVER CO
2022-11-22 720-978-7XXX T-MOBILE USA, INC. 6529 DENVER CO
2022-11-22 720-978-8XXX T-MOBILE USA, INC. 6529 DENVER CO
2022-11-22 720-978-9XXX T-MOBILE USA, INC. 6529 DENVER CO
2022-11-21 435-580-3XXX T-MOBILE USA, INC. 6529 NEPHI UT
2022-11-21 872-325-3XXX T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2022-11-21 872-325-4XXX T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2022-11-21 872-325-5XXX T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2022-11-21 872-325-6XXX T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2022-11-21 872-325-7XXX T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2022-11-21 872-325-8XXX T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2022-11-21 872-325-9XXX T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2022-11-18 479-405-0XXX T-MOBILE USA, INC. 6529 ROGERS AR
2022-11-18 479-405-2XXX T-MOBILE USA, INC. 6529 ROGERS AR
2022-11-18 479-405-3XXX T-MOBILE USA, INC. 6529 ROGERS AR
2022-11-18 479-491-9XXX T-MOBILE USA, INC. 6529 CLARKSVL AR
2022-11-18 501-427-5XXX T-MOBILE USA, INC. 6529 MAUMELLE AR
2022-11-16 830-396-7XXX T-MOBILE USA, INC. 6529 KENEDY TX
2022-11-15 564-226-9XXX T-MOBILE USA, INC. 6529 BREMERTON WA
2022-11-14 564-218-1XXX T-MOBILE USA, INC. 6529 BREMERTON WA
2022-11-14 564-218-2XXX T-MOBILE USA, INC. 6529 BREMERTON WA
2022-11-14 564-218-3XXX T-MOBILE USA, INC. 6529 BREMERTON WA
2022-11-09 406-923-8XXX T-MOBILE USA, INC. 6529 GREATFALLS MT
2022-11-09 406-923-9XXX T-MOBILE USA, INC. 6529 GREATFALLS MT
2022-11-09 458-255-4XXX T-MOBILE USA, INC. 6529 HERMISTON OR
2022-11-09 458-271-7XXX T-MOBILE USA, INC. 6529 ROSEBURG OR
2022-11-09 458-271-8XXX T-MOBILE USA, INC. 6529 ROSEBURG OR
2022-11-09 458-800-6XXX T-MOBILE USA, INC. 6529 MADRAS OR
2022-11-09 541-578-6XXX T-MOBILE USA, INC. 6529 MOSIER OR
2022-11-09 626-654-5XXX T-MOBILE USA, INC. 6529 PSDN PSDN CA
2022-11-09 626-654-6XXX T-MOBILE USA, INC. 6529 PSDN PSDN CA
2022-11-09 626-654-7XXX T-MOBILE USA, INC. 6529 PSDN PSDN CA
2022-11-09 626-654-8XXX T-MOBILE USA, INC. 6529 PSDN PSDN CA
2022-11-09 626-654-9XXX T-MOBILE USA, INC. 6529 PSDN PSDN CA
2022-11-09 650-912-6XXX T-MOBILE USA, INC. 6529 HALFMOONBY CA
2022-11-09 661-597-9XXX T-MOBILE USA, INC. 6529 MOJAVE CA
2022-11-09 725-290-0XXX T-MOBILE USA, INC. 6529 LAS VEGAS NV
2022-11-09 725-290-1XXX T-MOBILE USA, INC. 6529 LAS VEGAS NV
2022-11-09 725-290-2XXX T-MOBILE USA, INC. 6529 LAS VEGAS NV
2022-11-09 725-290-3XXX T-MOBILE USA, INC. 6529 LAS VEGAS NV
2022-11-09 725-290-4XXX T-MOBILE USA, INC. 6529 LAS VEGAS NV
2022-11-09 725-290-5XXX T-MOBILE USA, INC. 6529 LAS VEGAS NV
2022-11-09 725-290-6XXX T-MOBILE USA, INC. 6529 LAS VEGAS NV

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.