NumberResearch Membership · Data 09/23/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/23/2026

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, all time — NPA 217
T-MOBILE USA, INC. 233
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
2025-04-01 217-323-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BEARDSTOWN IL
2025-04-01 217-909-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BEARDSTOWN IL
2025-04-01 217-909-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BEARDSTOWN IL
2025-01-13 217-407-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PITTSFIELD IL
2025-01-13 217-922-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PITTSFIELD IL
2025-01-13 217-922-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PITTSFIELD IL
2024-02-07 217-350-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MOUNT ZION IL
2024-01-09 217-865-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELWIN IL
2022-07-21 217-933-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 HUMBOLDT IL
2022-01-08 217-500-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 EFFINGHAM IL
2022-01-08 217-708-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 EFFINGHAM IL
2021-12-06 217-790-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHARLESTON IL
2021-11-05 217-695-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 QUINCY IL
2021-11-05 217-919-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 QUINCY IL
2021-10-25 217-809-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 DECATUR IL
2021-10-18 217-991-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2021-10-11 217-719-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 JACKSONVL IL
2021-10-11 217-719-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 JACKSONVL IL
2021-10-11 217-719-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 JACKSONVL IL
2021-10-11 217-719-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 JACKSONVL IL
2021-09-28 217-512-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHARLESTON IL
2021-09-28 217-708-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EFFINGHAM IL
2021-09-28 217-969-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LITCHFIELD IL
2021-09-17 217-695-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 QUINCY IL
2021-09-10 217-866-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2021-09-10 217-888-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2021-09-10 217-888-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2021-09-10 217-888-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2021-06-09 217-570-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CLINTON IL
2021-02-08 217-731-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CLINTON IL
2020-12-15 217-969-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LITCHFIELD IL
2020-12-14 217-850-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2020-11-19 217-250-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LITCHFIELD IL
2020-11-19 217-250-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LITCHFIELD IL
2020-07-29 217-850-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2020-03-20 217-850-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2018-12-18 217-920-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DANVILLE IL
2018-12-18 217-920-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DANVILLE IL
2018-12-13 217-806-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DANVILLE IL
2018-10-19 217-926-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ARCOLA IL
2018-10-19 217-926-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ARCOLA IL
2018-10-19 217-926-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ARCOLA IL
2018-10-19 217-926-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ARCOLA IL
2018-10-19 217-926-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ARCOLA IL
2018-10-19 217-926-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARCOLA IL
2018-09-14 217-850-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2018-04-13 217-518-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ARCOLA IL
2018-04-13 217-518-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ARCOLA IL
2018-04-13 217-518-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ARCOLA IL
2018-04-13 217-518-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ARCOLA IL

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.