To create listeners for your load balancer, use CreateListener. You can add security groups, subnets, and tags when you create your load balancer, or you can add them later using SetSecurityGroups, SetSubnets, and AddTags.
To describe your current load balancers, see DescribeLoadBalancers. When you are finished with a load balancer, you can delete it using DeleteLoadBalancer.
You can create up to 20 load balancers per region per account. You can request an increase for the number of load balancers for your account. For more information, see Limits for Your Application Load Balancer in the Application Load Balancers Guide.
For more information, see Application Load Balancers in the Application Load Balancers Guide.