Well, Amazon owns IMDB, so it's probably a reasonable assumption.

Quick lookup says yes, # host imdb.com imdb.com has address 207.171.166.22 imdb.com has address 72.21.210.29 imdb.com has address 72.21.206.80 # host 207.171.166.22 22.166.171.207.in-addr.arpa domain name pointer 166-22.amazon.com.

For starters, Amazon owns IMDb.