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 870
T-MOBILE USA, INC. 186
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
2026-01-22 870-564-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DELL AR
2025-12-30 870-609-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 POCAHONTAS AR
2025-12-05 870-564-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 DELL AR
2025-12-05 870-981-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BIGGERS AR
2025-10-27 870-979-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BLYTHEVL AR
2025-10-27 870-982-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DE QUEEN AR
2025-06-12 870-361-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TEXARKANA AR
2025-05-20 870-702-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 W MEMPHIS AR
2025-05-01 870-679-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WALNUT RDG AR
2025-03-12 870-781-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BAY AR
2025-03-12 870-785-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OIL TROUGH AR
2025-03-12 870-810-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 POCAHONTAS AR
2025-03-12 870-846-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ASHDOWN AR
2025-03-12 870-929-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BERRYVILLE AR
2024-06-13 870-806-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BATESVILLE AR
2024-03-07 870-923-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BLYTHEVL AR
2024-03-07 870-923-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BLYTHEVL AR
2024-03-07 870-923-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BLYTHEVL AR
2024-03-07 870-923-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BLYTHEVL AR
2023-03-23 870-651-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LAKE CITY AR
2023-02-24 870-806-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BATESVILLE AR
2023-01-31 870-902-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BLYTHEVL AR
2022-12-13 870-902-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BLYTHEVL AR
2022-11-04 870-217-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 NEWPORT AR
2022-09-14 870-902-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BLYTHEVL AR
2022-07-21 870-902-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BLYTHEVL AR
2022-07-21 870-902-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BLYTHEVL AR
2022-04-20 870-902-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BLYTHEVL AR
2022-04-20 870-902-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BLYTHEVL AR
2022-04-20 870-902-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BLYTHEVL AR
2022-02-11 870-560-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PARAGOULD AR
2022-02-11 870-560-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PARAGOULD AR
2022-02-11 870-848-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 HOPE AR
2022-02-11 870-849-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 HARRISON AR
2021-12-30 870-752-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BRINKLEY AR
2021-10-08 870-790-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 JONESBORO AR
2021-10-08 870-790-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 JONESBORO AR
2021-10-08 870-790-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 JONESBORO AR
2021-10-08 870-790-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 JONESBORO AR
2021-10-08 870-790-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 JONESBORO AR
2021-10-08 870-790-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 JONESBORO AR
2021-10-08 870-790-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 JONESBORO AR
2021-06-24 870-626-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MAGNOLIA AR
2021-06-24 870-626-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MAGNOLIA AR
2021-05-28 870-664-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 NEWPORT AR
2021-04-26 870-409-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BLYTHEVL AR
2021-04-26 870-409-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BLYTHEVL AR
2021-02-03 870-319-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BRINKLEY AR
2021-01-14 870-641-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 JONESBORO AR
2021-01-11 870-395-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PINE BLUFF AR

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.