Enter host name or IP address: 2 result(s) for 128.21.4.in-addr.arpa
namequery typeresultfirst seenlast seen
128.21.4.in-addr.arpa. NSns1.appliedtheory.com.
2023-01-13 10:08:592025-01-02 21:53:53
128.21.4.in-addr.arpa. NSns2.appliedtheory.com.
2023-01-13 10:08:592025-01-02 21:53:53

WHOIS info for: 128.21.4.in-addr.arpa

No whois server is known for this kind of object.