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
2005-03-22 509-388-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2005-03-14 509-480-3XXX 3000–3999Assigned UNITED STATES CELLULAR - WA 6270 YAKIMA WA
2005-03-14 509-480-4XXX 4000–4999Assigned UNITED STATES CELLULAR - WA 6270 YAKIMA WA
2005-03-14 509-480-5XXX 5000–5999Assigned UNITED STATES CELLULAR - WA 6270 YAKIMA WA
2005-03-14 509-480-6XXX 6000–6999Assigned UNITED STATES CELLULAR - WA 6270 YAKIMA WA
2005-03-14 509-480-7XXX 7000–7999Assigned UNITED STATES CELLULAR - WA 6270 YAKIMA WA
2005-03-14 509-480-8XXX 8000–8999Assigned UNITED STATES CELLULAR - WA 6270 YAKIMA WA
2005-03-10 509-288-7XXX 7000–7999Assigned INLAND CELLULAR LLC 1484 COLFAX WA
2005-03-10 509-288-8XXX 8000–8999Assigned INLAND CELLULAR LLC 1484 COLFAX WA
2005-03-10 509-988-7XXX 7000–7999Assigned INLAND CELLULAR LLC 1477 ODESSA WA
2005-02-28 509-460-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2005-02-25 509-431-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MOSES LAKE WA
2005-02-25 509-431-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MOSES LAKE WA
2005-02-25 509-431-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MOSES LAKE WA
2005-02-24 509-793-9XXX 9000–9999Assigned QWEST CORPORATION 9638 MOSES LAKE WA
2005-02-22 509-280-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2005-02-22 509-280-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2005-02-22 509-389-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2005-02-22 509-389-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2005-02-22 509-389-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2005-02-22 509-389-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2005-02-22 509-389-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2005-02-22 509-389-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2005-02-22 509-591-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KENNEWICK WA
2005-02-22 509-676-1XXX 1000–1999Assigned TELEWISE, LLC - WA 4718 WALLAWALLA WA
2005-02-18 509-293-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WENATCHEE WA
2005-02-18 509-293-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WENATCHEE WA
2005-02-18 509-293-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WENATCHEE WA
2005-02-18 509-392-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 RICHLAND WA
2005-02-18 509-392-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 RICHLAND WA
2005-02-11 509-630-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WENATCHEE WA
2005-02-10 509-690-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 COLVILLE WA
2005-02-04 509-254-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 CLARKSTON WA
2005-02-04 509-392-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RICHLAND WA
2005-02-04 509-492-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PASCO WA
2005-02-04 509-590-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SPOKANE WA
2005-02-04 509-590-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SPOKANE WA
2005-02-04 509-592-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PULLMAN WA
2005-01-26 509-388-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2005-01-26 509-388-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2005-01-20 509-207-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 REPUBLIC WA
2005-01-20 509-774-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WH SALMON WA
2005-01-20 509-844-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2005-01-20 509-844-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2005-01-20 509-844-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2005-01-20 509-863-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2005-01-14 509-388-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 YAKIMA WA
2005-01-13 509-480-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2005-01-13 509-480-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2005-01-12 509-540-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 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.