DNSBL Spam Check

Checked IP: 23.21.109.197
rDNS/PTR record: psm.knowbe4.com

Not Listed: 26 checks
Check Response time
Found rDNS/PTR: psm.knowbe4.com
23.0830 ms
Inactive: 2
Inactive
Response in: 8.9154589 seconds
Amount of searched blacklists: 26 (2 inactive)