**To modify a prefix list** The following ``modify-managed-prefix-list`` example adds an entry to the specified prefix list. :: aws ec2 modify-managed-prefix-list \ --prefix-list-id pl-0123456abcabcabc1 \ --add-entries Cidr=10.1.0.0/16,Description=vpc-c \ --current-version 1 Output:: { "PrefixList": { "PrefixListId": "pl-0123456abcabcabc1", "AddressFamily": "IPv4", "State": "modify-in-progress", "PrefixListArn": "arn:aws:ec2:us-west-2:123456789012:prefix-list/pl-0123456abcabcabc1", "PrefixListName": "vpc-cidrs", "MaxEntries": 10, "Version": 1, "OwnerId": "123456789012" } } For more information, see `Managed prefix lists <https://docs.aws.amazon.com/vpc/latest/userguide/managed-prefix-lists.html>`__ in the *Amazon VPC User Guide*.