DNSBL Spam Check

Checked IP: 23.21.109.212
rDNS/PTR record: psm.knowbe4.com

Not Listed: 25 checks
Check Response time
Found rDNS/PTR: psm.knowbe4.com
39.5000 ms
Inactive: 2
Inactive
Response in: 24.895669 seconds
Amount of searched blacklists: 25 (2 inactive)