This is a beta version of the Whois Gateway operated by ST47. It adds support for querying referral DNS servers, such as those provided by Cogent for their 38.0.0.0/8 range. This is done automatically when the provider supports it. The source code for this fork is maintained at GitHub.
WhoisRateLimitError('Whois lookup failed for 2806:104e:1a:2cc2:99fc:6e6e:14d2:1981. Rate limit exceeded, wait and try again (possibly a temporary block).')