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
2013-12-23 509-872-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K GARRISON WA
2013-12-18 509-571-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2013-12-16 509-291-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E ROCKFORD WA
2013-12-16 509-552-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CLARKSTON WA
2013-12-13 509-221-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2013-12-13 509-406-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2013-12-13 509-699-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WENATCHEE WA
2013-12-13 509-919-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2013-12-13 509-919-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2013-12-13 509-919-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2013-12-13 509-919-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2013-12-06 509-919-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2013-11-21 509-349-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WARDEN WA
2013-11-21 509-383-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GRANGER WA
2013-11-21 509-497-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 BENTONCITY WA
2013-11-20 509-219-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J STEVENSON WA
2013-11-20 509-250-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GOLDENDALE WA
2013-11-20 509-281-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WH SALMON WA
2013-11-20 509-364-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 GLENWOOD WA
2013-11-20 509-365-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LYLE WA
2013-11-20 509-369-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KLICKITAT WA
2013-11-20 509-384-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ROOSEVELT WA
2013-11-20 509-395-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TROUT LAKE WA
2013-11-20 509-538-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WILLARD WA
2013-11-20 509-748-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DALLESPORT WA
2013-11-11 509-342-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2013-11-11 509-761-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 MOSES LAKE WA
2013-11-08 509-212-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2013-11-08 509-919-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2013-11-07 509-552-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CLARKSTON WA
2013-11-06 509-859-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2013-11-04 509-436-2XXX 2000–2999Assigned COMPUTERS 5*, INC. DBA LOCALTEL - WA 3229 WENATCHEE WA
2013-10-29 509-980-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 CONNELL WA
2013-10-28 509-346-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OTHELLO WA
2013-10-22 509-792-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PASCO WA
2013-10-17 509-314-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TOPPENISH WA
2013-10-17 509-379-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2013-10-17 509-379-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2013-10-17 509-631-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F COULEE DAM WA
2013-10-17 509-919-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2013-10-15 509-255-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F LIBERTY LK WA
2013-10-15 509-593-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F WALLAWALLA WA
2013-10-14 509-321-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SPOKANE WA
2013-10-14 509-342-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SPOKANE WA
2013-10-07 509-282-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CONNELL WA
2013-10-03 509-201-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ELLENSBURG WA
2013-10-03 509-698-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K SELAH WA
2013-10-03 509-968-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ELLENSBURG WA
2013-09-27 509-932-1XXX 1000–1999Assigned UNITED STATES CELLULAR - WA 6270 MATTAWA WA
2013-09-26 509-379-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 YAKIMA 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.