NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

7 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
2013-05-14 509-379-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2013-05-14 509-491-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2013-05-02 509-578-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 RICHLAND WA
2013-04-30 509-412-7XXX 7000–7999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 PASCO WA
2013-04-30 509-491-5XXX 5000–5999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 KENNEWICK WA
2013-04-26 509-202-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2013-04-09 509-822-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SPOKANE WA
2013-04-03 509-379-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2013-04-03 509-822-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2013-03-20 509-412-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E PASCO WA
2013-03-14 509-415-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WENATCHEE WA
2013-02-27 509-607-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2013-02-27 509-822-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SPOKANE WA
2013-02-26 509-202-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2013-02-22 509-778-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PROSSER WA
2013-02-19 509-491-3XXX 3000–3999Assigned CHARTER IP ENABLED SERVICES, LLC 792K KENNEWICK WA
2013-02-13 509-491-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2013-01-31 509-797-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2013-01-11 509-288-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 COLFAX WA
2013-01-11 509-822-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2012-12-17 509-379-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2012-12-14 509-740-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 OMAK WA
2012-12-14 509-822-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2012-12-12 509-202-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2012-12-12 509-202-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2012-12-12 509-202-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2012-12-11 509-295-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CLARKSTON WA
2012-11-21 509-941-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2012-11-20 509-713-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 RICHLAND WA
2012-11-20 509-761-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 MOSES LAKE WA
2012-11-15 509-412-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 PASCO WA
2012-11-14 509-593-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 WALLAWALLA WA
2012-11-09 509-774-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WH SALMON WA
2012-11-07 509-497-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BENTONCITY WA
2012-11-02 509-876-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K WALLAWALLA WA
2012-11-01 509-557-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K OMAK WA
2012-10-31 509-491-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2012-10-17 509-202-1XXX 1000–1999Assigned NUSO, LLC 551G SPOKANE WA
2012-10-11 509-491-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 KENNEWICK WA
2012-10-11 509-634-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 NESPELEM WA
2012-10-10 509-412-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PASCO WA
2012-10-10 509-593-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WALLAWALLA WA
2012-10-09 509-491-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2012-09-14 509-415-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 WENATCHEE WA
2012-09-14 509-424-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2012-09-14 509-515-1XXX 1000–1999Assigned METROPCS, INC. 5562 SUNNYSIDE WA
2012-09-10 509-424-3XXX 3000–3999Assigned CHARTER IP ENABLED SERVICES, LLC 792K YAKIMA WA
2012-09-06 509-412-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PASCO WA
2012-09-06 509-424-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2012-09-06 509-424-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.