wilderness - 7:30 am on Nov 12, 2012 (gmt 0)
Although there is a vast difference between "shared hosting" and "colo's", personally (and for categorical convenience), I consider the definition the same.
In May pf this year I had a PHP probe.
Six in succession, all from differnet IP's.
One of the IP's was a different Class C as yours, however the same colo:
DataShack, LC DSV4-4 220.127.116.11 - 18.104.22.168
Considering DSV4-4, I'm sure they have more ranges.