DNSBL Spam Check

Checked IP: 51.81.0.90
rDNS/PTR record: ip90.ip-51-81-0.us

Not Listed: 25 checks
Check Response time
Found rDNS/PTR: ip90.ip-51-81-0.us
505.1010 ms
Inactive: 2
Inactive
Response in: 4.618206 seconds
Amount of searched blacklists: 25 (2 inactive)