The IP Database can pass reverse DNS information back and forth to a DNS management backend to simplify maintenance of the reverse DNS records associated with the IPs being managed.

Several shortcuts can be used when specifying a pattern for an IPv4 netblock, which will be expanded to actual DNS records by the DNS management system.

Template patterns are not supported for IPv6 allocations due to the size of the address space and typical size of allocations.

Substitution patternExample expansion using 192.168.23.45
Whole-IP patterns
Dashed IP%i192-168-23-45
Reverse dashed IP%r45-23-168-192
Hex-coded IP%hc0a8172d
Decimal IP%d323241453
Per-octet patterns (1, 2, 3, or 4 specify the octet; d, h or 0 specify decimal, hexidecimal, or 0-padded decimal)
First octet, decimal%1d192
Third octet, 0-padded%30023
Fourth octet, hexidecimal%4h2d
All octets, different expansions%1h-%2d-%30-%4hc0-168-023-2d

%i and %r also allow explicitly defining the separator; eg %.i or %_r. '.', '-', and '_' are the only characters
supported since DNS names may not contain most other non-alphanumerics.