| Date | IP Address |
| 2021-03-02 | 104.198.190.59 (ClassC) |
| 2025-03-28 | 104.21.74.225 (ClassC) |
| 2025-10-16 | 172.67.164.13 (ClassC) |
| Date | Domain | IP |
| e517b33bb2cb4d53b4f81f68a5f9d090.hdguru.com | 2025-07-02 | 172.67.164.13 |
| mx0.hdguru.com | 2025-03-29 | 172.67.164.13 |
| smtp1.hdguru.com | 2025-04-07 | 172.67.164.13 |
| mx1.hdguru.com | 2025-07-08 | 172.67.164.13 |
| mail12.hdguru.com | 2025-08-01 | 172.67.164.13 |
| mail2.hdguru.com | 2025-07-14 | 104.21.74.225 |
| imap2.hdguru.com | 2025-07-05 | 172.67.164.13 |
| www2.hdguru.com | 2025-04-29 | 104.21.74.225 |
| mail3.hdguru.com | 2025-07-15 | 172.67.164.13 |
| pop3.hdguru.com | 2025-05-09 | 104.21.74.225 |
| mx3.hdguru.com | 2025-04-21 | 172.67.164.13 |
| mail4.hdguru.com | 2025-04-21 | 172.67.164.13 |
| mx5.hdguru.com | 2025-04-21 | 104.21.74.225 |
| mx7.hdguru.com | 2025-08-09 | 104.21.74.225 |
| mail8.hdguru.com | 2025-04-23 | 104.21.74.225 |
| mail9.hdguru.com | 2025-07-04 | 104.21.74.225 |
| barracuda.hdguru.com | 2025-07-26 | 172.67.164.13 |
| zb.hdguru.com | 2025-06-13 | 172.67.164.13 |
| static.hdguru.com | 2025-04-23 | 172.67.164.13 |
| lync.hdguru.com | 2025-07-02 | 104.21.74.225 |
| e.hdguru.com | 2025-04-28 | 172.67.164.13 |
| home.hdguru.com | 2025-07-08 | 172.67.164.13 |
| mailgate.hdguru.com | 2025-06-09 | 172.67.164.13 |
| auth.hdguru.com | 2025-03-28 | 104.21.74.225 |
| yuxi.hdguru.com | 2025-03-28 | 104.21.74.225 |
| newmail.hdguru.com | 2025-05-14 | 172.67.164.13 |
| m.hdguru.com | 2025-05-07 | 172.67.164.13 |
| spam.hdguru.com | 2025-07-20 | 172.67.164.13 |
| antispam.hdguru.com | 2025-07-07 | 104.21.74.225 |
| mailin.hdguru.com | 2025-04-22 | 172.67.164.13 |
| smtp.hdguru.com | 2025-04-21 | 104.21.74.225 |
| authsmtp.hdguru.com | 2025-07-07 | 104.21.74.225 |
| server.hdguru.com | 2025-06-25 | 104.21.74.225 |
| mailserver.hdguru.com | 2025-06-26 | 104.21.74.225 |
| allons.hdguru.com | 2025-04-30 | 172.67.164.13 |
| smtps.hdguru.com | 2025-05-07 | 104.21.74.225 |
| root.hdguru.com | 2025-04-30 | 172.67.164.13 |
| host.hdguru.com | 2025-04-23 | 104.21.74.225 |
| post.hdguru.com | 2025-04-29 | 172.67.164.13 |
| mailx.hdguru.com | 2025-05-04 | 104.21.74.225 |
| mx.hdguru.com | 2025-05-04 | 104.21.74.225 |
| box.hdguru.com | 2025-07-19 | 104.21.74.225 |
| relay.hdguru.com | 2025-06-09 | 172.67.164.13 |