NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

7 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
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
2016-05-04 509-608-1XXX 1000–1999Assigned METROPCS, INC. 5562 SPOKANE WA
2016-05-04 509-608-2XXX 2000–2999Assigned METROPCS, INC. 5562 SPOKANE WA
2016-04-29 509-260-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E CLE ELUM WA
2016-04-29 509-260-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E CLE ELUM WA
2016-04-29 509-608-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2016-04-29 509-608-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2016-04-28 509-580-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SELAH WA
2016-04-26 509-204-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E WALLAWALLA WA
2016-04-26 509-204-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E WALLAWALLA WA
2016-04-26 509-316-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E PASCO WA
2016-04-26 509-316-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E PASCO WA
2016-04-26 509-553-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E COLFAX WA
2016-04-26 509-955-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E YAKIMA WA
2016-04-26 509-955-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E YAKIMA WA
2016-04-26 509-955-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E YAKIMA WA
2016-04-18 509-579-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2016-04-08 509-992-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2016-04-08 509-992-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2016-04-08 509-992-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2016-03-25 509-316-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K PASCO WA
2016-03-25 509-404-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DAYTON WA
2016-03-25 509-643-8XXX 8000–8999Assigned UNITED STATES CELLULAR - WA 6270 SUNNYSIDE WA
2016-03-25 509-745-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 DOUGLASCO WA
2016-03-23 509-596-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CLARKSTON WA
2016-03-17 509-316-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PASCO WA
2016-03-17 509-934-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2016-03-17 509-934-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2016-03-16 509-832-4XXX 4000–4999Assigned UNITED STATES CELLULAR - WA 6270 PROSSER WA
2016-03-16 509-964-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2016-03-15 509-553-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E COLFAX WA
2016-03-15 509-566-0XXX 0000–0999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F POMEROY WA
2016-03-15 509-571-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2016-03-14 509-788-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PROSSER WA
2016-03-10 509-204-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E WALLAWALLA WA
2016-03-10 509-643-7XXX 7000–7999Assigned UNITED STATES CELLULAR - WA 6270 SUNNYSIDE WA
2016-03-10 509-903-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E LIBERTY LK WA
2016-03-10 509-903-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E LIBERTY LK WA
2016-03-08 509-303-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E PROSSER WA
2016-03-08 509-890-1XXX 1000–1999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F DEER PARK WA
2016-03-08 509-934-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SPOKANE WA
2016-03-08 509-934-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SPOKANE WA
2016-03-08 509-934-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SPOKANE WA
2016-03-07 509-620-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F COULEE DAM WA
2016-03-07 509-790-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E SUNNYSIDE WA
2016-03-07 509-790-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E SUNNYSIDE WA
2016-03-07 509-934-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2016-03-07 509-934-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2016-03-04 509-367-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2016-03-04 509-699-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 WENATCHEE WA
2016-03-04 509-820-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KENNEWICK 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.