Sort out Apple hosts

I have a question about Apple network traffic. In my network program I can see these three domains (GET)

http://ift.tt/1DZwIHM

http://ift.tt/1DdOkKs

http://ift.tt/1DZwLDa...

These appears when I receive or send text messages from/to my iPhone. The question is:

Does these three domains show up even if it's NOT related to text messages?

Thanks!