v0.4

• Option to look for only active subdomains
• Exclude subdomains by DNS answers
• Support multiple DNS servers
• Option to perform reverse DNS lookup

v0.3

• Recursion
• Faster
• Use Cloudflare DNS server (1.1.1.1) as default

v0.2

• Better and faster
• Support multiple subdomains from -s
• Quiet mode

v0.1

The initial release of Flydns