Deleting a VCN
On Compute Cloud@Customer, a VCN can only be deleted if it's empty. Before deleted a VCN, ensure that all subnets, route tables, gateways, and other resources have been deleted.
For more information about deleting VCNs and Subnets, see Subnet or VCN Deletion
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In the Compute Cloud@Customer Console navigation menu, select Networking, then select Virtual Cloud Networks. 
- At the top of the page, select the compartment that contains the VCN.
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Select the name of the VCN that you want to delete. The VCN details page is displayed. 
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Under Resources, ensure that the VCN doesn't have any resources. If all the resources such as Subnets, Route Tables, and so on include a zero in parenthesis, then the VCN doesn't have any resources. If a resource exists, you must delete the resource before you can delete the VCN. 
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Select Delete. 
- Confirm the deletion.
 
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- Use the oci network vcn delete command and required parameters to delete a VCN. - oci network vcn delete --vcn-id vcn_OCID [OPTIONS]- For a complete list of CLI commands, flags, and options, see the Command Line Reference. 
- Use the DeleteVCN operation to delete a VCN. - For information about using the API and signing requests, see REST APIs and Security Credentials. For information about SDKs, see Software Development Kits and Command Line Interface.