Search if your IP is blacklisted on EvilNet DNSBL.
The DNSBL is daily update with new IP add it.
NOTE: You need to install DIG for this script work well.
NOTE: Ubuntu / Debian: apt-get install dig
NOTE: CentOS: yum install dig
git clone https://github.com/unixfool/EvilIP.git
cd EvilIP
chmod +x evilip.sh
sh evilip.sh IP