Hi, using this following bash script you can check mass URT from a list,
#!/bin/bash
echo "#Mass HTTP Header Status Checker";
echo "# usage: check.sh target.txt";
file=$1
while IFS= read bulk
do
curl -o /dev/null --max-time 10 --silent --head --write-out "%{http_code} - $bulk\n" "$bulk"
done < "$file"
exit 0