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
2021-04-21 509-223-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E LOOMIS WA
2021-04-21 509-427-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E STEVENSON WA
2021-04-21 509-645-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E BREWSTER WA
2021-04-21 509-871-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E OROVILLE WA
2021-04-21 509-894-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E MABTON WA
2021-04-20 509-339-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PULLMAN WA
2021-04-19 509-600-6XXX 6000–6999Assigned FRACTEL, LLC 965H BRIDGEPORT WA
2021-04-16 509-712-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SUNNYSIDE WA
2021-04-15 509-816-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SPOKANE WA
2021-04-12 509-516-0XXX 0000–0999Assigned TELNYX LLC 073H WALLAWALLA WA
2021-04-06 509-517-3XXX 3000–3999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F YAKIMA WA
2021-04-05 509-300-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E WENATCHEE WA
2021-04-02 509-609-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2021-04-02 509-609-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2021-04-02 509-609-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2021-04-02 509-609-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2021-03-31 509-404-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 DAYTON WA
2021-03-31 509-559-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E CHENEY WA
2021-03-26 509-518-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2021-03-26 509-518-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2021-03-26 509-518-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2021-03-24 509-637-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WH SALMON WA
2021-03-24 509-640-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 COLVILLE WA
2021-03-24 509-740-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OMAK WA
2021-03-24 509-827-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RICHLAND WA
2021-03-22 509-201-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2021-03-22 509-201-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2021-03-22 509-403-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J QUINCY WA
2021-03-22 509-403-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J QUINCY WA
2021-03-18 509-512-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MOSES LAKE WA
2021-03-17 509-502-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E SUNNYSIDE WA
2021-03-17 509-504-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2021-03-17 509-518-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENNEWICK WA
2021-03-17 509-518-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENNEWICK WA
2021-03-17 509-957-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2021-03-17 509-957-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2021-03-15 509-596-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CLARKSTON WA
2021-03-10 509-283-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E ROCKFORD WA
2021-03-02 509-601-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2021-03-02 509-601-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2021-03-02 509-601-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2021-03-02 509-601-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2021-03-02 509-601-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2021-03-02 509-601-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2021-03-02 509-601-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2021-03-02 509-601-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2021-03-02 509-610-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 COLFAX WA
2021-03-02 509-616-1XXX 1000–1999Assigned IP HORIZON LLC 515J SPOKANE WA
2021-02-25 509-508-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SPOKANE WA
2021-02-16 509-516-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WALLAWALLA 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.