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
2017-01-31 580-576-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PONCA CITY OK
2017-01-31 580-954-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ALTUS OK
2017-01-31 970-485-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DILLON CO
2017-01-30 217-577-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 QUINCY IL
2017-01-30 573-621-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SIKESTON MO
2017-01-30 573-838-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SIKESTON MO
2017-01-30 618-503-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CARBONDALE IL
2017-01-30 708-690-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BLUEISLAND IL
2017-01-30 708-690-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BLUEISLAND IL
2017-01-30 708-690-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BLUEISLAND IL
2017-01-27 626-426-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 COVINA CA
2017-01-27 626-426-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 COVINA CA
2017-01-27 909-530-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ARROWHEAD CA
2017-01-25 217-850-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2017-01-23 479-925-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ROGERS AR
2017-01-20 562-378-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WHITTIER CA
2017-01-20 641-781-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 NEWTON IA
2017-01-19 224-540-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ROUND LAKE IL
2017-01-19 224-540-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ROUND LAKE IL
2017-01-19 330-934-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 NEWPHLDLPH OH
2017-01-18 661-403-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2017-01-18 909-761-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 S BERNDINO CA
2017-01-17 209-592-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LOS BANOS CA
2017-01-17 310-554-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CMTN CMTN CA
2017-01-17 360-784-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 VANCOUVER WA
2017-01-17 425-837-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2017-01-17 442-295-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BARSTOW CA
2017-01-17 669-230-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNJS WEST CA
2017-01-17 805-635-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PASOROBLES CA
2017-01-13 626-503-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA
2017-01-13 626-503-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA
2017-01-13 626-503-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA
2017-01-13 626-503-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA
2017-01-13 626-503-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA
2017-01-13 661-630-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SHAFTER CA
2017-01-13 760-782-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 WARNER SPG CA
2017-01-13 916-260-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 FOLSOM CA
2017-01-12 312-569-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2017-01-12 312-572-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2017-01-12 312-599-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2017-01-12 312-599-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2017-01-12 562-588-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ALAMITOS CA
2017-01-12 626-610-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AZUSA CA
2017-01-12 657-347-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2017-01-12 669-278-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CAMPBELL CA
2017-01-12 747-276-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 VAN NUYS CA
2017-01-12 747-276-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 VAN NUYS CA
2017-01-12 847-641-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ROSELLE IL
2017-01-12 847-641-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ROSELLE IL
2017-01-12 858-280-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 DEL MAR CA

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.