This is now open sourced from a previous project I worked on. This may not help in all scenarios but has helped me before to get away from making a cheesy "dig/nslookup loop" script.
This tool will query various DNS servers in hopes of getting all IP's a particular domain resolves to.
It will query Google DNS, Cloudflare DNS, and whatever the local resolver is 4 times and remove any duplicates. This is in hopes of triggering any round-robbin DNS resolver to get any possible IP a domain resolves to.
To get more practice with golang, I decided to rewrite this tool from the original python. However, you will still be able to get the original python code held in the python branch of this repo. Comparing each version side by side and running against the same domain, I see on average ~60% performance increase from the go binary.
The easiest way to run is with the container image:
docker run -it --rm registry.gitlab.com/aro5000/ip-hunter:latest domain.to.query.here
Use the following commands to build and run this tool as a container:
docker build -t iphunter .
docker run -it --rm iphunter <domain>
Use the following commands to build and run this tool locally (need golang installed):
go build ./cmd/ip-hunter/
./ip-hunter <domain>