Complex sentence: As of mid- 2015, my IP-address is none of your business, a highly stable IP that was mine from January 2013 to June 2015 or thereabout.
Split into simpler sentences: As of mid- 2015, my IP-address is'. Prior to that, I used the IP', a highly stable IP that was mine from January 2013 to June 2015 or thereabout.