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Last active Apr 21, 2021
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Lookup A-record and Nameservers for a list of domains in a txt file, output into a csv file
# Put all the domain names in domains.txt, one per line
# then run in the terminal: bash
# this will print each domain in the terminal as it looks it up
# The result csv will contains the domain, IP & Nameservers in each column
# Give each column the relevant header titles
echo "Domain Name,IP Address,Nameserver,Nameserver,Nameserver,Nameserver,Nameserver" > domains.csv
while read domain
# Get IP address defined in domain's root A-record
ipaddress=`dig $domain +short`
# Get list of all nameservers
ns=`dig ns $domain +short| sort | tr '\n' ','`
# Use the line below to extract any information from whois
# ns=`whois $domain | grep "Name Server" | cut -d ":" -f 2 | sed 's/ //' | sed -e :a -e '$!N;s/ \n/,/;ta'`
echo "$domain"
# Uncomment the following lines to output the information directly into the terminal
# echo "IP Address: $ipaddress"
# echo "Nameservers: $ns"
# echo " "
# Prints all the values fetched into the CSV file
echo -e "$domain,$ipaddress,$ns" >> domains.csv
# Defines the text file from which to read domain names
done < domains.txt
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