NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

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
COMMIO, LLC 19
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
2024-03-22 509-208-6XXX 6000–6999Assigned COMMIO, LLC 939H YAKIMA WA
2024-03-22 509-231-2XXX 2000–2999Assigned COMMIO, LLC 939H KENNEWICK WA
2024-03-22 509-407-8XXX 8000–8999Assigned COMMIO, LLC 939H QUINCY WA
2023-04-03 509-794-4XXX 4000–4999Assigned COMMIO, LLC 939H QUINCY WA
2022-10-24 509-298-8XXX 8000–8999Assigned COMMIO, LLC 939H MOSES LAKE WA
2022-10-24 509-564-7XXX 7000–7999Assigned COMMIO, LLC 939H DEER PARK WA
2022-10-21 509-296-0XXX 0000–0999Assigned COMMIO, LLC 939H PULLMAN WA
2022-06-27 509-419-0XXX 0000–0999Assigned COMMIO, LLC 939H COLVILLE WA
2022-06-27 509-516-7XXX 7000–7999Assigned COMMIO, LLC 939H WALLAWALLA WA
2022-06-27 509-615-1XXX 1000–1999Assigned COMMIO, LLC 939H ELK-GRNBLF WA
2022-03-23 509-800-6XXX 6000–6999Assigned COMMIO, LLC 939H CLARKSTON WA
2021-08-03 509-518-6XXX 6000–6999Assigned COMMIO, LLC 939H KENNEWICK WA
2021-08-03 509-870-1XXX 1000–1999Assigned COMMIO, LLC 939H KENNEWICK WA
2021-08-03 509-870-5XXX 5000–5999Assigned COMMIO, LLC 939H KENNEWICK WA
2021-07-30 509-506-3XXX 3000–3999Assigned COMMIO, LLC 939H YAKIMA WA
2021-07-30 509-506-4XXX 4000–4999Assigned COMMIO, LLC 939H YAKIMA WA
2021-07-30 509-506-6XXX 6000–6999Assigned COMMIO, LLC 939H YAKIMA WA
2021-07-30 509-506-7XXX 7000–7999Assigned COMMIO, LLC 939H YAKIMA WA
2019-03-12 509-666-0XXX 0000–0999Assigned COMMIO, LLC 939H SPOKANE WA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.