NumberResearch Membership · Data 09/25/2026

Recent thousands-block assignments

69 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/25/2026

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. 69
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
2019-06-29 312-779-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2019-06-29 312-779-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2019-06-29 312-779-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2019-06-29 312-779-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2019-06-28 469-553-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WAXAHACHIE TX
2019-06-28 682-847-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CLEBURNE TX
2019-06-28 682-847-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CLEBURNE TX
2019-06-28 737-356-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 GEORGETOWN TX
2019-06-27 480-572-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2019-06-27 480-572-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2019-06-27 480-572-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2019-06-27 480-572-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2019-06-27 480-572-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2019-06-27 480-572-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2019-06-27 480-572-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2019-06-27 480-572-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2019-06-26 210-905-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2019-06-26 385-326-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2019-06-26 531-625-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SOSIOUX CY NE
2019-06-26 531-625-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SOSIOUX CY NE
2019-06-26 531-625-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SOSIOUX CY NE
2019-06-26 531-625-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SOSIOUX CY NE
2019-06-26 531-625-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SOSIOUX CY NE
2019-06-26 531-625-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SOSIOUX CY NE
2019-06-26 720-691-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2019-06-26 720-691-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2019-06-26 720-691-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2019-06-26 720-691-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2019-06-26 720-691-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2019-06-26 720-691-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2019-06-26 720-691-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2019-06-26 720-691-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2019-06-25 314-476-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2019-06-25 314-476-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2019-06-25 314-476-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2019-06-25 747-999-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SNFN SNFN CA
2019-06-25 972-821-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 IRVING TX
2019-06-25 972-957-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 IRVING TX
2019-06-24 619-603-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 NATIONALCY CA
2019-06-24 972-381-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 DALLAS TX
2019-06-24 972-503-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 DALLAS TX
2019-06-21 209-431-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 JAMESTOWN CA
2019-06-21 213-451-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2019-06-21 214-817-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MIDLOTHIAN TX
2019-06-21 214-817-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MIDLOTHIAN TX
2019-06-21 253-325-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2019-06-21 331-261-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LEMONT IL
2019-06-21 360-672-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OAK HARBOR WA
2019-06-21 360-814-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MT VERNON WA
2019-06-21 405-866-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PAULS VLY OK

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.