DNS_Enumerator

git clone https://github.com/crypticq/DNS_Enumerator
cd DNS_Enumerator
go build dns.go 

Usage: ./dns <domain> <wordlist> <threading num>

example

./dns hackerone.com subdomains-top1million-5000.txt 40

run it in docker

docker build -t dns . 
docker run dns hackerone.com subdomains-top1million-5000.txt 40