$ aws elb describe-load-balancers --load-balancer-names a4fafa3e6f24911e6aac506402a2bc46
{
    "LoadBalancerDescriptions": [
         {
             "ListenerDescriptions": [
                {
                    "Listener": {
                        "InstancePort": 32706, 
                        "LoadBalancerPort": 80, 
                        "Protocol": "TCP", 
                        "InstanceProtocol": "TCP"
                    }, 
                    "PolicyNames": []
                }
            ] 
        }
    ]
}

package main

import (
	"log"

	"github.com/aws/aws-sdk-go/aws/session"
	"github.com/aws/aws-sdk-go/service/elb"
)

func main() {
	name := "a4fafa3e6f24911e6aac506402a2bc46"

	sess := session.Must(session.NewSession())
	svc := elb.New(sess)

	request := &elb.DescribeLoadBalancersInput{}
	request.LoadBalancerNames = []*string{&name}

	response, err := svc.DescribeLoadBalancers(request)
	if err != nil {
		log.Fatal(err)
	}

	for _, loadBalancer := range response.LoadBalancerDescriptions {
		log.Printf("ELB: %v\n", loadBalancer)
		return
	}
}

2017/06/06 11:11:49 ELB: {
  AvailabilityZones: ["us-west-2a","us-west-2b","us-west-2c"],
  CanonicalHostedZoneNameID: "xxx",
  CreatedTime: 2017-03-24 03:35:49.48 +0000 UTC,
  DNSName: "internal-a4fafa3e6f24911e6aac506402a2bc46-2085661947.us-west-2.elb.amazonaws.com",
  HealthCheck: {
    HealthyThreshold: 2,
    Interval: 10,
    Target: "TCP:32706",
    Timeout: 5,
    UnhealthyThreshold: 6
  },
  Instances: [{
      InstanceId: "i-xxx"
    },{
      InstanceId: "i-xxx"
    },{
      InstanceId: "i-xxx"
    }],
  ListenerDescriptions: [{
      Listener: {
        InstancePort: 32706,
        InstanceProtocol: "TCP",
        LoadBalancerPort: 80,
        Protocol: "TCP"
      }
    }],
  LoadBalancerName: "a4fafa3e6f24911e6aac506402a2bc46",
  Policies: {

  },
  Scheme: "internal",
  SecurityGroups: ["sg-xxx"],
  SourceSecurityGroup: {
    GroupName: "k8s-elb-a4fafa3e6f24911e6aac506402a2bc46",
    OwnerAlias: "xxx"
  },
  Subnets: ["subnet-xxx","subnet-xxx","subnet-xxx"],
  VPCId: "vpc-xxx"
}