whois.conf (5)
NAME
whois.conf - alternative WHOIS servers list for whois clientSYNOPSIS
/etc/whois.confDESCRIPTION
This file contains a list of WHOIS servers which can augment or override the built-in list of the client.It's a plain text file in ASCII encoding. Each line consists of two fields: a pattern to match WHOIS object identifier and a corresponding WHOIS server domain name.
Fields are separated by non-empty sequence of space or a tabular characters. A line starting with a hash character is a free comment and it's not considered.
The pattern is case-insensitive extended regular expression if whois client has been compiled with POSIX regular expressions support. Otherwise, simple case-insensitive suffix comparison against WHOIS object identifier is used.
Internationalized domain names (IDN) must be specified in ascii-compatible encoding (ACE) format.
EXAMPLE
\.nz$ nz.whois-servers.net# Hangul Korean TLD
\.xn--3e0b707e$ whois.kr
# Private ASNs
^as645(1[2-9]|2[0-9]|3[0-4])$ whois.example.net