１コマンドで確認することができる。

aws --profile stg elbv2 describe-load-balancers --load-balancer-arns arn:aws:elasticloadbalancing:ap-northeast-1:01234567:loadbalancer/net/tsukadanlb/a1b2c3d4e5

結果は以下の通り

{
    "LoadBalancers": [
        {
            "LoadBalancerArn": "arn:aws:elasticloadbalancing:ap-northeast-1:708179590705:loadbalancer/net/tsukadanlb/a1b2c3d4e5",
            "DNSName": "tsukada-nlb-a1b2c3d4e5.elb.ap-northeast-1.amazonaws.com",
            "CanonicalHostedZoneId": "a1b2c3d4e5",
            "CreatedTime": "2019-06-06T11:01:01.615000+00:00",
            "LoadBalancerName": "tsukada-nlb",
            "Scheme": "internal",
            "VpcId": "vpc-a1b2c3d4e5",
            "State": {
                "Code": "active"
            },
            "Type": "network",
            "AvailabilityZones": [
                {
                    "ZoneName": "ap-northeast-1c",
                    "SubnetId": "subnet-a1b2c3d4e5",
                    "LoadBalancerAddresses": []
                },
                {
                    "ZoneName": "ap-northeast-1a",
                    "SubnetId": "subnet-a1b2c3d4e5",
                    "LoadBalancerAddresses": []
                }
            ],
            "IpAddressType": "ipv4"
        }
    ]
}