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
2013-09-26 509-486-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K TONASKET WA
2013-09-17 509-919-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2013-09-11 509-423-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WENATCHEE WA
2013-09-10 509-773-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E GOLDENDALE WA
2013-09-04 509-855-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MOSES LAKE WA
2013-08-30 509-414-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E ELK-GRNBLF WA
2013-08-30 509-621-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E NEWMANLAKE WA
2013-08-30 509-821-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E DEER PARK WA
2013-08-27 509-415-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 WENATCHEE WA
2013-08-13 509-221-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2013-08-13 509-379-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2013-08-13 509-439-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SUNNYSIDE WA
2013-08-13 509-638-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2013-08-13 509-789-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2013-08-13 509-821-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 DEER PARK WA
2013-08-13 509-842-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2013-08-08 509-202-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SPOKANE WA
2013-08-07 509-221-2XXX 2000–2999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KENNEWICK WA
2013-08-07 509-221-3XXX 3000–3999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KENNEWICK WA
2013-08-07 509-221-4XXX 4000–4999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KENNEWICK WA
2013-08-07 509-221-5XXX 5000–5999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KENNEWICK WA
2013-08-07 509-221-6XXX 6000–6999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KENNEWICK WA
2013-08-07 509-221-7XXX 7000–7999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KENNEWICK WA
2013-08-06 509-733-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BREWSTER WA
2013-08-02 509-379-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2013-08-01 509-379-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2013-07-23 509-212-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2013-07-23 509-821-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E DEER PARK WA
2013-07-18 509-929-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2013-07-15 509-370-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2013-07-15 509-379-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2013-07-15 509-822-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2013-07-10 509-423-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 WENATCHEE WA
2013-06-18 509-822-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2013-06-07 509-260-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E CLE ELUM WA
2013-06-07 509-397-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E COLFAX WA
2013-06-07 509-424-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E YAKIMA WA
2013-06-07 509-563-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E COLVILLE WA
2013-06-07 509-631-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E COULEE DAM WA
2013-06-07 509-740-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E OMAK WA
2013-06-07 509-761-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E MOSES LAKE WA
2013-06-07 509-769-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E CLARKSTON WA
2013-06-07 509-956-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E WALLAWALLA WA
2013-06-06 509-578-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RICHLAND WA
2013-05-24 509-207-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 REPUBLIC WA
2013-05-21 509-202-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2013-05-21 509-202-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2013-05-21 509-202-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2013-05-21 509-851-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PASCO WA
2013-05-17 509-578-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RICHLAND 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.