DNSBL Multi Checker
Check multiple Domains / IPs against a lot of DNSBLs
GBUdb.com - truncate.gbudb.net
All about the DNSBL / RBL (DNS Blacklist, Real Time Blacklist) at truncate.gbudb.net
Remove Listing Url:
GBUdb stands for Good, Bad, Ugly database. GBUdb is a real-time collaborative IP reputation system. This system is built into Message Sniffer where it can accurately learn about the kind of content that is sent by email sources on the Internet.