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
2006-10-16 509-378-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2006-10-11 509-240-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WALLAWALLA WA
2006-10-11 509-399-3XXX 3000–3999Assigned INLAND CELLULAR LLC 1484 STARBUCK WA
2006-10-11 509-399-4XXX 4000–4999Assigned INLAND CELLULAR LLC 1484 STARBUCK WA
2006-10-11 509-524-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WALLAWALLA WA
2006-10-11 509-834-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2006-10-11 509-834-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2006-10-11 509-877-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WAPATO WA
2006-10-10 509-416-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PASCO WA
2006-10-09 509-240-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WALLAWALLA WA
2006-10-06 509-331-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OTHELLO WA
2006-10-06 509-361-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MOSES LAKE WA
2006-09-26 509-846-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 OMAK WA
2006-09-21 509-420-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E RICHLAND WA
2006-09-19 509-392-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 RICHLAND WA
2006-09-18 509-350-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E MOSES LAKE WA
2006-09-18 509-494-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 YAKIMA WA
2006-09-18 509-593-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E WALLAWALLA WA
2006-09-18 509-654-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 YAKIMA WA
2006-09-18 509-690-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E COLVILLE WA
2006-09-17 509-254-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E CLARKSTON WA
2006-09-17 509-331-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E OTHELLO WA
2006-09-17 509-398-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E EPHRATA WA
2006-09-17 509-414-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E ELK-GRNBLF WA
2006-09-17 509-494-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2006-09-17 509-621-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E NEWMANLAKE WA
2006-09-17 509-631-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E COULEE DAM WA
2006-09-17 509-651-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E DEER PARK WA
2006-09-15 509-385-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2006-09-15 509-385-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2006-09-15 509-385-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2006-09-15 509-385-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2006-09-15 509-607-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2006-09-14 509-592-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PULLMAN WA
2006-09-13 509-449-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BRIDGEPORT WA
2006-09-13 509-540-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WALLAWALLA WA
2006-09-07 509-895-2XXX 2000–2999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F YAKIMA WA
2006-09-05 509-295-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CLARKSTON WA
2006-09-05 509-987-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENNEWICK WA
2006-08-31 509-250-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GOLDENDALE WA
2006-08-31 509-637-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WH SALMON WA
2006-08-29 509-205-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2006-08-28 509-478-7XXX 7000–7999Assigned INLAND CELLULAR LLC 1484 ROSALIA WA
2006-08-28 509-478-8XXX 8000–8999Assigned INLAND CELLULAR LLC 1484 ROSALIA WA
2006-08-25 509-339-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K PULLMAN WA
2006-08-23 509-252-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SPOKANE WA
2006-08-23 509-348-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E DAVENPORT WA
2006-08-23 509-896-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 MABTON WA
2006-08-18 509-554-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RICHLAND WA
2006-08-18 509-942-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 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.