[users] Reverse DNS Question

[Jeff Montgomey]

I have a block of public IP's that I need to create PTR records for.  
When I try to enter them into VegaDNS I get a error saying: *Error: 
domain 0/28.58.147.12.in-addr.arpa does not appear to be a valid domain name

*It will work if I do 85.147.12.in-adr.arpa but I do not own that whole 
block.  What should I do?