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
2014-12-22 509-656-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CLE ELUM WA
2014-12-22 509-658-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 NILE WA
2014-12-22 509-672-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 RIMROCK WA
2014-12-22 509-678-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 COWICHE WA
2014-12-22 509-740-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J OMAK WA
2014-12-22 509-749-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 EUREKA WA
2014-12-22 509-775-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J REPUBLIC WA
2014-12-22 509-779-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CURLEW WA
2014-12-19 509-299-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MEDICAL LK WA
2014-12-19 509-821-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DEER PARK WA
2014-12-16 509-215-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DAVENPORT WA
2014-12-16 509-361-1XXX 1000–1999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F MOSES LAKE WA
2014-12-16 509-641-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WILBUR WA
2014-12-16 509-797-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J QUINCY WA
2014-12-16 509-982-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 ODESSA WA
2014-12-12 509-680-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 COLVILLE WA
2014-12-11 509-964-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2014-12-02 509-821-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DEER PARK WA
2014-12-01 509-598-4XXX 4000–4999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SPOKANE WA
2014-12-01 509-820-3XXX 3000–3999Assigned CHARTER IP ENABLED SERVICES, LLC 792K KENNEWICK WA
2014-11-19 509-415-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 WENATCHEE WA
2014-11-19 509-592-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PULLMAN WA
2014-11-14 509-515-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SUNNYSIDE WA
2014-11-14 509-579-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KENNEWICK WA
2014-11-05 509-367-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K YAKIMA WA
2014-11-03 509-203-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GRANDVIEW WA
2014-10-31 509-317-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J YAKIMA WA
2014-10-30 509-316-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F PASCO WA
2014-10-17 509-655-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2014-10-17 509-655-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2014-10-17 509-655-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2014-10-17 509-655-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2014-10-17 509-675-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 COLVILLE WA
2014-10-17 509-733-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BREWSTER WA
2014-10-17 509-820-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENNEWICK WA
2014-10-17 509-840-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SUNNYSIDE WA
2014-10-16 509-821-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DEER PARK WA
2014-10-15 509-214-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 NEWMANLAKE WA
2014-10-15 509-359-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHENEY WA
2014-10-15 509-367-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 YAKIMA WA
2014-10-15 509-414-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK-GRNBLF WA
2014-10-15 509-565-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MEDICAL LK WA
2014-10-14 509-367-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2014-10-14 509-580-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SELAH WA
2014-10-08 509-730-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WALLAWALLA WA
2014-10-02 509-763-6XXX 6000–6999Assigned METROPCS, INC. 5562 WENATCHEE WA
2014-10-02 509-763-7XXX 7000–7999Assigned METROPCS, INC. 5562 WENATCHEE WA
2014-10-02 509-763-8XXX 8000–8999Assigned METROPCS, INC. 5562 WENATCHEE WA
2014-10-02 509-763-9XXX 9000–9999Assigned METROPCS, INC. 5562 WENATCHEE WA
2014-10-02 509-964-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG 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.