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
2017-09-06 509-498-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E CHENEY WA
2017-09-06 509-550-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E NEWPORT WA
2017-09-06 509-553-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E COLFAX WA
2017-09-06 509-566-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E POMEROY WA
2017-09-06 509-588-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E BENTONCITY WA
2017-09-06 509-677-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E LIND WA
2017-09-06 509-785-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E GEORGE WA
2017-09-06 509-878-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E PALOUSE WA
2017-09-06 509-923-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E PATEROS WA
2017-08-31 509-253-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E HARRINGTON WA
2017-08-31 509-284-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E TEKOA WA
2017-08-31 509-299-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E MEDICAL LK WA
2017-08-31 509-560-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E OROVILLE WA
2017-08-31 509-587-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E BREWSTER WA
2017-08-31 509-600-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E BRIDGEPORT WA
2017-08-31 509-639-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E ALMIRA WA
2017-08-31 509-644-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E LOON LAKE WA
2017-08-31 509-653-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E NACHES WA
2017-08-31 509-678-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E COWICHE WA
2017-08-31 509-779-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E CURLEW WA
2017-08-31 509-794-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E QUINCY WA
2017-08-31 509-903-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E LIBERTY LK WA
2017-08-31 509-978-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E NESPELEM WA
2017-08-31 509-982-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E ODESSA WA
2017-08-30 509-960-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2017-08-30 509-992-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2017-08-30 509-992-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2017-08-30 509-992-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2017-08-30 509-992-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2017-08-28 509-644-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K LOON LAKE WA
2017-08-22 509-391-3XXX 3000–3999Assigned UNITED STATES CELLULAR - WA 6270 SUNNYSIDE WA
2017-08-18 509-936-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CHEWELAH WA
2017-08-15 509-890-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F DEER PARK WA
2017-08-10 509-405-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2017-08-10 509-405-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2017-08-10 509-537-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PASCO WA
2017-08-10 509-558-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SPOKANE WA
2017-08-08 509-904-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SPOKANE WA
2017-07-27 509-515-6XXX 6000–6999Assigned UNITED STATES CELLULAR - WA 6270 SUNNYSIDE WA
2017-07-11 509-439-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SUNNYSIDE WA
2017-07-11 509-793-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 MOSES LAKE WA
2017-07-11 509-902-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2017-07-05 509-593-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F WALLAWALLA WA
2017-07-05 509-593-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F WALLAWALLA WA
2017-06-30 509-317-3XXX 3000–3999Assigned METROPCS, INC. 5562 YAKIMA WA
2017-06-30 509-416-3XXX 3000–3999Assigned METROPCS, INC. 5562 PASCO WA
2017-06-26 509-940-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K RICHLAND WA
2017-06-15 509-862-1XXX 1000–1999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F SPOKANE WA
2017-06-13 509-579-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K KENNEWICK WA
2017-06-09 509-608-6XXX 6000–6999Assigned METROPCS, INC. 5562 SPOKANE 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.