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
2020-05-06 509-856-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ELLENSBURG WA
2020-04-28 509-432-7XXX 7000–7999Assigned METROPCS, INC. 5562 PULLMAN WA
2020-04-28 509-824-8XXX 8000–8999Assigned QWEST CORPORATION 9638 SPOKANE WA
2020-04-17 509-900-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SPOKANE WA
2020-04-15 509-418-3XXX 3000–3999Assigned METROPCS, INC. 5562 SPOKANE WA
2020-04-09 509-873-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2020-04-02 509-433-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WENATCHEE WA
2020-04-02 509-433-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WENATCHEE WA
2020-04-02 509-490-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2020-04-02 509-490-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2020-04-02 509-490-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2020-04-02 509-640-4XXX 4000–4999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F COLVILLE WA
2020-04-02 509-857-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 ELLENSBURG WA
2020-04-02 509-907-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2020-04-01 509-980-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 CONNELL WA
2020-03-31 509-864-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TOPPENISH WA
2020-03-30 509-634-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 NESPELEM WA
2020-03-26 509-770-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 MOSES LAKE WA
2020-03-24 509-589-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 NEWPORT WA
2020-03-23 509-873-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2020-03-18 509-312-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ELLENSBURG WA
2020-03-18 509-676-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WALLAWALLA WA
2020-03-17 509-407-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 QUINCY WA
2020-03-17 509-690-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 COLVILLE WA
2020-03-16 509-418-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2020-03-16 509-505-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2020-03-16 509-553-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 COLFAX WA
2020-03-12 509-418-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2020-03-12 509-824-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2020-03-12 509-824-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2020-03-12 509-824-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2020-03-12 509-824-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2020-02-26 509-401-8XXX 8000–8999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F POMEROY WA
2020-02-13 509-699-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WENATCHEE WA
2020-01-29 509-219-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 STEVENSON WA
2020-01-16 509-629-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E WALLAWALLA WA
2019-12-18 509-676-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WALLAWALLA WA
2019-12-17 509-418-0XXX 0000–0999Assigned TELNYX LLC 073H SPOKANE WA
2019-12-13 509-418-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SPOKANE WA
2019-12-13 509-875-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PATERSON WA
2019-11-22 509-841-2XXX 2000–2999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F WAITSBURG WA
2019-11-20 509-771-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 MOSES LAKE WA
2019-11-07 509-824-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SPOKANE WA
2019-11-07 509-824-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SPOKANE WA
2019-11-06 509-409-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2019-11-06 509-409-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2019-11-06 509-409-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2019-11-06 509-409-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2019-11-06 509-409-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2019-11-06 509-409-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY 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.