Simple answer is that you cannot, since remote server address is not part of the HTTP response headers.
It is part of your request headers though with the field name HOST
.
These are some of the headers fields in HTTP response:
ETag
Content-Length
Expires
Last-Modified
Connection
X-Powered-By
Server
Pragma
Cache-Control
Date
Vary
Keep-Alive
Content-Type
Accept-Ranges