Possible, yes. Likely, no.
The PTR record is set by whomever is in charge of the ARIN record for the network block, which could be anything from a /8 down to possibly a /23 or so. Some ISPs will set up a PTR for you; my current one will not, but 2 ISPs ago did. Call 'em, find out, its up to them to set-up though, its nothing they'll delegate off. The two times I've gotten this setup, they did it for free as well, as a courtesy.