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
2019-06-10 509-500-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 ASOTIN WA
2019-06-04 509-428-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RITZVILLE WA
2019-05-30 509-656-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 CLE ELUM WA
2019-05-30 509-854-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GRANGER WA
2019-05-21 509-634-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 NESPELEM WA
2019-05-17 509-790-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SUNNYSIDE WA
2019-05-07 509-864-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TOPPENISH WA
2019-05-06 509-620-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K COULEE DAM WA
2019-05-03 509-900-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SPOKANE WA
2019-04-29 509-505-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2019-04-29 509-505-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2019-04-29 509-666-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2019-04-29 509-666-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2019-04-29 509-666-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2019-04-29 509-873-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2019-04-29 509-873-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2019-04-26 509-303-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PROSSER WA
2019-04-26 509-861-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E OMAK WA
2019-04-15 509-402-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E GRANDVIEW WA
2019-04-12 509-553-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 COLFAX WA
2019-04-11 509-505-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SPOKANE WA
2019-04-09 509-827-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RICHLAND WA
2019-04-08 509-505-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2019-04-08 509-505-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2019-03-12 509-666-0XXX 0000–0999Assigned COMMIO, LLC 939H SPOKANE WA
2019-03-06 509-505-1XXX 1000–1999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F SPOKANE WA
2019-03-05 509-490-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2019-02-25 509-900-0XXX 0000–0999Assigned TERRA NOVA TELECOM INC. 145J SPOKANE WA
2019-02-19 509-890-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 DEER PARK WA
2019-02-19 509-906-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EPHRATA WA
2019-02-14 509-505-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SPOKANE WA
2019-02-13 509-204-8XXX 8000–8999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F WALLAWALLA WA
2019-02-13 509-490-3XXX 3000–3999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F YAKIMA WA
2019-02-11 509-530-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SPOKANE WA
2019-01-31 509-408-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F LIBERTY LK WA
2019-01-31 509-408-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F LIBERTY LK WA
2019-01-31 509-408-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F LIBERTY LK WA
2019-01-29 509-903-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F LIBERTY LK WA
2019-01-29 509-903-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F LIBERTY LK WA
2019-01-29 509-903-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F LIBERTY LK WA
2019-01-29 509-903-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F LIBERTY LK WA
2019-01-28 509-730-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WALLAWALLA WA
2019-01-23 509-402-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E GRANDVIEW WA
2019-01-23 509-402-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E GRANDVIEW WA
2019-01-18 509-827-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 RICHLAND WA
2019-01-18 509-827-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 RICHLAND WA
2019-01-16 509-907-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 YAKIMA WA
2019-01-15 509-761-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 MOSES LAKE WA
2019-01-14 509-306-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ELLENSBURG WA
2019-01-14 509-306-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ELLENSBURG 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.