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 509
T-MOBILE USA, INC. 332
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2026-07-24 509-788-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PROSSER WA
2026-01-08 509-718-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2025-11-28 509-708-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2025-11-28 509-708-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2025-11-28 509-708-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2025-10-17 509-387-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WENATCHEE WA
2025-09-23 509-708-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2025-09-23 509-708-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2025-09-23 509-708-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2025-08-19 509-708-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2025-08-19 509-708-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2025-07-09 509-617-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2025-07-09 509-705-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2025-05-16 509-705-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2025-05-16 509-705-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2025-03-07 509-705-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2025-03-07 509-705-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2025-03-07 509-705-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2024-12-17 509-617-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2024-12-17 509-617-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2024-08-30 509-617-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2024-08-30 509-617-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2024-07-30 509-437-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2024-07-30 509-602-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CONNELL WA
2024-07-30 509-970-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2024-07-30 509-970-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2024-06-10 509-617-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2024-06-10 509-617-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2024-05-03 509-905-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PASCO WA
2024-05-03 509-905-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PASCO WA
2024-05-03 509-905-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PASCO WA
2024-01-12 509-975-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PASCO WA
2024-01-12 509-975-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PASCO WA
2023-12-06 509-273-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2023-12-06 509-273-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2023-12-05 509-798-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2023-12-05 509-798-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2023-12-05 509-798-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2023-12-05 509-798-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2023-08-11 509-986-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2023-06-16 509-450-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 EPHRATA WA
2023-06-16 509-450-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 EPHRATA WA
2023-05-19 509-310-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WH SALMON WA
2023-05-12 509-610-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 COLFAX WA
2023-03-24 509-589-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 NEWPORT WA
2023-01-13 509-428-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 RITZVILLE WA
2023-01-13 509-980-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CONNELL WA
2022-10-26 509-906-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EPHRATA WA
2022-10-19 509-273-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2022-10-18 509-986-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG 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.