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mail1-cust.portunity.de checked at 2025-10-30T04:31:00.302Z 51ms 45/45/45 100% R:6

`mail1-cust.portunity.de`

1.5.0.0.0.0.0.0.0.0.0.0.2.0.0.0.0.0.0.0.0.0.0.0.0.0.a.0.2.0.a.2.ip6.arpa

51.128.144.217.in-addr.arpa

mail1-cust.portunity.de resolves to two IP numbers: 2a02:a00::2:0:0:51 and 217.144.128.51.

Other host names such as imap.portunity.de and smtp.portunity.de share IP numbers with mail1-cust.portunity.de.

dbq