| Date | IP Address |
| 2026-01-04 | 74.114.164.83 (ClassC) |
| Date | Domain | IP |
| mail01.classicplumbinginc.com | 2025-12-25 | 74.114.164.83 |
| 4327960342621859368.classicplumbinginc.com | 2025-12-25 | 74.114.164.83 |
| posta.classicplumbinginc.com | 2025-10-06 | 74.114.164.83 |
| home.classicplumbinginc.com | 2025-06-02 | 74.114.164.83 |
| antispam.classicplumbinginc.com | 2026-01-04 | 74.114.164.83 |
| mailer.classicplumbinginc.com | 2025-10-06 | 74.114.164.83 |
| mails.classicplumbinginc.com | 2025-12-22 | 74.114.164.83 |
| host.classicplumbinginc.com | 2025-10-06 | 74.114.164.83 |
| mailbox.classicplumbinginc.com | 2025-12-25 | 74.114.164.83 |
| gateway.classicplumbinginc.com | 2025-12-25 | 74.114.164.83 |