NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

66 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. 66
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
2006-12-29 330-281-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 RAVENNA OH
2006-12-29 440-623-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BEREA OH
2006-12-29 440-623-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BEREA OH
2006-12-29 515-209-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 WEBSTER CY IA
2006-12-29 515-447-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2006-12-29 515-447-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2006-12-29 515-447-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2006-12-29 515-447-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2006-12-29 515-447-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2006-12-29 712-266-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SIOUX CITY IA
2006-12-29 805-607-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 OXNARD CA
2006-12-29 805-607-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OXNARD CA
2006-12-29 815-666-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2006-12-29 815-666-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2006-12-29 815-666-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2006-12-29 815-666-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2006-12-29 903-292-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ATHENS TX
2006-12-29 903-292-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ATHENS TX
2006-12-29 903-830-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TYLER TX
2006-12-29 903-830-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TYLER TX
2006-12-29 951-972-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2006-12-28 469-237-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 FRISCO TX
2006-12-28 469-237-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 FRISCO TX
2006-12-27 224-856-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELGIN IL
2006-12-27 253-886-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2006-12-27 424-213-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CMTN CMTN CA
2006-12-27 559-495-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2006-12-27 580-277-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ARDMORE OK
2006-12-27 626-466-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SIERRAMADR CA
2006-12-27 661-526-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2006-12-27 707-534-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 VALLEJO CA
2006-12-27 818-941-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 VAN NUYS CA
2006-12-27 818-941-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 VAN NUYS CA
2006-12-27 818-941-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 VAN NUYS CA
2006-12-22 224-321-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 WAUKEGAN IL
2006-12-22 224-321-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 WAUKEGAN IL
2006-12-22 262-527-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 WAUKESHA WI
2006-12-22 262-527-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WAUKESHA WI
2006-12-22 262-527-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WAUKESHA WI
2006-12-22 262-527-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WAUKESHA WI
2006-12-22 440-714-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LORAIN OH
2006-12-22 541-391-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ROSEBURG OR
2006-12-22 636-388-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 UNION MO
2006-12-22 641-923-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 GARNER IA
2006-12-21 254-813-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 KILLEEN TX
2006-12-21 330-978-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WARREN OH
2006-12-21 608-359-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 JANESVILLE WI
2006-12-21 808-454-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HONOLULU HI
2006-12-21 940-597-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 DENTON TX
2006-12-20 253-359-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TACOMA WA

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.