NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 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, all time — NPA 937
T-MOBILE USA, INC. 287
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
2024-02-20 937-326-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MSBGWCRLTN OH
2024-02-20 937-560-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MSBGWCRLTN OH
2024-02-20 937-560-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MSBGWCRLTN OH
2024-02-20 937-798-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PEEBLES OH
2024-02-20 937-918-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 VANDALIA OH
2024-02-20 937-918-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 VANDALIA OH
2024-02-20 937-955-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 GERMANTOWN OH
2024-02-20 937-983-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TIPP CITY OH
2024-02-20 937-983-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TIPP CITY OH
2024-02-07 937-801-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 GEORGETOWN OH
2023-08-04 937-946-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 XENIA OH
2023-08-03 937-875-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TROY OH
2023-04-08 937-514-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 FRANKLIN OH
2023-04-08 937-514-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 FRANKLIN OH
2023-03-29 937-483-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 GEORGETOWN OH
2023-03-07 937-941-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 NEWCARLISL OH
2022-01-31 937-794-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PIQUA OH
2022-01-31 937-794-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PIQUA OH
2022-01-31 937-794-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PIQUA OH
2022-01-31 937-794-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PIQUA OH
2022-01-31 937-794-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PIQUA OH
2022-01-31 937-861-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EATON OH
2022-01-31 937-861-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EATON OH
2022-01-28 937-300-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 EATON OH
2022-01-19 937-820-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HILLSBORO OH
2022-01-19 937-820-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HILLSBORO OH
2022-01-18 937-500-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HILLSBORO OH
2022-01-18 937-500-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HILLSBORO OH
2022-01-18 937-939-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 HILLSBORO OH
2022-01-18 937-939-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 HILLSBORO OH
2021-12-07 937-772-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 URBANA OH
2021-12-07 937-772-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 URBANA OH
2021-12-07 937-803-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 GREENFIELD OH
2021-12-07 937-803-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 GREENFIELD OH
2021-11-03 937-809-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 DAYTON OH
2021-11-03 937-809-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 DAYTON OH
2021-11-03 937-814-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 DAYTON OH
2021-11-03 937-814-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 DAYTON OH
2021-11-03 937-814-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DAYTON OH
2021-10-14 937-727-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD OH
2021-10-14 937-727-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD OH
2021-10-14 937-727-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD OH
2021-10-14 937-727-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD OH
2021-10-14 937-925-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD OH
2021-06-07 937-939-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 HILLSBORO OH
2021-06-07 937-939-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HILLSBORO OH
2021-06-07 937-939-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HILLSBORO OH
2021-03-22 937-794-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PIQUA OH
2021-03-22 937-794-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PIQUA OH
2021-02-05 937-803-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 GREENFIELD OH

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.