How to find the S3 bucket URL

http://s3-external-1.amazonaws.com/bucket/

This simple tool uses following pattern:

http://s3-<region>.amazonaws.com/<bucketname>/

For example, if your bucket is named mybucket and is located in the us-west-2 region, the URL would be:

http://s3-us-west-2.amazonaws.com/mybucket/

us-east-1 is an exception and you should use:

http://s3-external-1.s3.amazonaws.com/<bucketname>/