The acceptable use requirements of the Nominet WHOIS service are:

• The maximum query rate is 5 queries per second with a maximum of 1,000 queries per rolling 24 hours.
• If you exceed the query limits a block will be imposed. For further details please see the detailed instructions for use page.
• These limits are not per IP address, they are per user.
• This policy includes our standard anti-avoidance clause.