Does this IP have reverse DNS?

[Blake Hudson]

Just hoping to get a consensus on this. Postfix is stating that a host 
(in fact several hosts from the same ISP) does not have rDNS, because 
our DNS (Bind 9.8) returns SERVFAIL when looking up a PTR record for it. 
The IP in question is 63.171.0.212. From my perspective, this IP does 
not have a PTR record and as such does not have proper rDNS. Other tools 
(including older versions of bind) might say otherwise; What do you say?

--Blake*



*