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
2013-06-26 425-678-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2013-06-26 510-646-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2013-06-26 562-986-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ALAMITOS CA
2013-06-26 602-338-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2013-06-26 602-338-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2013-06-26 619-373-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHULAVISTA CA
2013-06-26 623-312-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2013-06-26 760-979-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BARSTOW CA
2013-06-26 903-215-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LONGVIEW TX
2013-06-25 224-804-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 DEERFIELD IL
2013-06-25 385-209-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2013-06-25 773-690-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2013-06-25 773-690-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2013-06-25 872-207-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-06-25 872-207-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-06-25 872-207-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-06-25 872-207-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-06-25 872-301-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-06-25 872-301-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-06-25 872-301-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-06-25 872-301-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-06-25 872-801-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-06-25 872-801-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-06-25 872-801-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-06-25 872-801-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-06-25 872-801-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-06-25 971-312-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MCMINNVL OR
2013-06-24 217-904-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2013-06-24 217-904-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2013-06-24 224-409-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2013-06-24 224-409-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2013-06-24 224-409-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2013-06-24 224-409-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2013-06-24 224-409-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2013-06-24 331-250-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 AURORA IL
2013-06-24 331-250-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AURORA IL
2013-06-24 331-250-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AURORA IL
2013-06-24 331-250-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AURORA IL
2013-06-24 714-592-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BREA CA
2013-06-24 773-800-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2013-06-24 872-305-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2013-06-24 872-305-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2013-06-24 872-305-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2013-06-24 872-305-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2013-06-24 872-305-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2013-06-24 872-305-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2013-06-24 872-305-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2013-06-24 872-999-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2013-06-21 224-248-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2013-06-21 224-248-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL

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.