AddrToArpa method
ArpaDomain = AddrToArpa ( IPAddr )
| IPAddr |
Long |
Numeric IP address (in network byte order) |
| ArpaDomain |
String |
ARPA domain name such as "1.0.0.127.in-addr.arpa" |
The AddrToArpa method provides a convenient means of representing IP
addresses in the format needed for PTR queries.
When doing a PTR query as a reverse lookup for an IP address, you must actually query
for a domain under in-addr.arpa composed of the dotted address string in reverse order.
For example, to get domain name for "216.46.230.21" you must do a PTR query
for "21.230.46.216.in-addr.arpa".
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