NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

8 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, last 30 days — NPA 509
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 3
NEW CINGULAR WIRELESS PCS, LLC 2
EXIANT COMMUNICATIONS LLC 2
LEVEL 3 COMMUNICATIONS, LLC - WA 1
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
2021-02-16 509-518-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2021-02-16 509-629-5XXX 5000–5999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F WALLAWALLA WA
2021-02-15 509-261-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 GOLDENDALE WA
2021-02-15 509-310-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WH SALMON WA
2021-02-12 509-306-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2021-02-12 509-401-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E POMEROY WA
2021-02-12 509-405-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2021-02-04 509-404-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F DAYTON WA
2021-02-04 509-408-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F LIBERTY LK WA
2021-02-04 509-871-8XXX 8000–8999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F OROVILLE WA
2021-02-01 509-918-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2021-01-30 509-304-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CLE ELUM WA
2021-01-30 509-428-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 RITZVILLE WA
2021-01-30 509-550-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 NEWPORT WA
2021-01-30 509-609-1XXX 1000–1999Assigned SKYE TELECOM LLC DBA SKYETEL 622J SPOKANE WA
2021-01-30 509-778-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PROSSER WA
2021-01-30 509-980-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CONNELL WA
2021-01-29 509-512-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E MOSES LAKE WA
2021-01-29 509-512-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E MOSES LAKE WA
2021-01-29 509-800-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E CLARKSTON WA
2021-01-29 509-800-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E CLARKSTON WA
2021-01-28 509-517-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E YAKIMA WA
2021-01-28 509-517-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E YAKIMA WA
2021-01-28 509-517-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E YAKIMA WA
2021-01-28 509-517-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E YAKIMA WA
2021-01-26 509-601-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H SPOKANE WA
2021-01-26 509-870-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E KENNEWICK WA
2021-01-26 509-870-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E KENNEWICK WA
2021-01-20 509-410-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E PASCO WA
2021-01-20 509-410-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E PASCO WA
2021-01-20 509-870-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E KENNEWICK WA
2021-01-15 509-512-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MOSES LAKE WA
2021-01-15 509-741-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 WENATCHEE WA
2021-01-13 509-502-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SUNNYSIDE WA
2021-01-11 509-517-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2021-01-11 509-517-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2021-01-08 509-403-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 QUINCY WA
2021-01-07 509-957-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2021-01-07 509-957-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2021-01-07 509-957-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2021-01-07 509-957-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2020-12-30 509-519-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E MATTAWA WA
2020-12-30 509-519-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E MATTAWA WA
2020-12-30 509-519-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E MATTAWA WA
2020-12-30 509-519-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E MATTAWA WA
2020-12-30 509-851-6XXX 6000–6999Assigned TERRA NOVA TELECOM INC. 145J PASCO WA
2020-12-23 509-606-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2020-12-23 509-606-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2020-12-23 509-606-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2020-12-23 509-606-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E 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.