Powelljl · February 26, 2020 10:17 · Feb 19, 2019 · Feb 18, 2019
diff --git a/bulk_dig.sh b/bulk_dig.sh
@@ -20,7 +20,7 @@ do
             echo "$domain,No DNS,,"; # Write "No DNS" in the IP column
         else # And if an IP is found perform a PTR and NetName lookup
             echo -en "$domain,$ip,"`dig @$ns_ip +short -x $ip |xargs`",";
-            whois $ip |grep NetName |awk '{print $NF}'|xargs;
+            whois $ip |grep -i 'netname' |awk '{print $NF}'|xargs;
     fi
     sleep $loop_wait # Pause before the next lookup to avoid flooding NS
 done;
diff --git a/bulk_dig.sh b/bulk_dig.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+# Bulk DNS Lookup
+# Generates a CSV of DNS lookups from a list of domains.
+#
+# File name/path of domain list:
+domain_list='domains.txt' # One FQDN per line in file.
+#
+# IP address of the nameserver used for lookups:
+ns_ip='1.1.1.1' # Is using Cloudflare's 1.1.1.1.
+#
+# Seconds to wait between lookups:
+loop_wait='1' # Is set to 1 second.
+
+echo "Domain name, IP Address, IP PTR, IP NetName (WHOIS)"; # Start CSV
+for domain in `cat $domain_list` # Start looping through domains
+do
+    ip=`dig @$ns_ip +short $domain |tail -n1`; # IP address lookup
+    if [ ! -n "$ip" ] # If the IP is null (expired or invalid domain)
+        then # Then
+            echo "$domain,No DNS,,"; # Write "No DNS" in the IP column
+        else # And if an IP is found perform a PTR and NetName lookup
+            echo -en "$domain,$ip,"`dig @$ns_ip +short -x $ip |xargs`",";
+            whois $ip |grep NetName |awk '{print $NF}'|xargs;
+    fi
+    sleep $loop_wait # Pause before the next lookup to avoid flooding NS
+done;