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Shodan InternetDB Reverse DNS Lookup
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| #!/usr/bin/env bash | |
| set -euo pipefail | |
| # usage: cat ./subnets.txt | mapcidr | inetdb-rdns | |
| xargs -I {} -n 1 -P 16 -r -- curl -sS https://internetdb.shodan.io/{} | \ | |
| jq -r 'select(.hostnames!=null)|.hostnames[]' | \ | |
| sort -Vu |
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