What is the default port for S3 connection?

I am wondering which port is being used by S3 for the connections? Is it HTTPS 443? Is there a way to change it to the custom port? Thanks!

Sample code
```cs
var client = new AmazonS3Client(accessKey, secretKey, RegionEndpoint.GetBySystemName(selectedRegion))
var buckets = client.ListBuckets().Buckets;
```

Environment
SDK Version: AWSSDK.Core 3.7.6
Package Version: AWSSDK.S3 3.7.7.14