2 TTL related registry on Windows client OS

1. Maximum time a client will cache positive results regardless what TTL a record holds:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Dnscache\Parameters\MaxCacheEntryTtlLimit

Note: A record will be cache on client for the period specified in

• record TTL or
• above registry value, whichever is less. 

2. When register its own record, the TTL sent to DNS server:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\DefaultRegistrationTTL

See Also

• Negative results are cached very differently. Please see Negative cache TTL on Windows-based DNS
• DNS Zone intervals - mapping values in Windows GUI to nslookup result for SOA record