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175.45.178.55

175.45.178.55 is an IP address that 2 published sources report in connection with unclustered DPRK activity, which public reporting attributes to North Korea (DPRK). It is cited here from Synaptic Security and NKInternet. The earliest of those reports is dated 2026-01-27 and the most recent 2026-03-10.

ip address DPRK (cluster unattributed) MATCHED IN SOURCE

First seen 2026-01-27 · last seen 2026-03-10

Network

Looked up 2026-09-21 at ip-api.com. A subscriber line, as a person working from home ordinarily has.

Sources

• …Running smtp.star-co.net.kp 175.45.178.56 25,587 Postfix smtp1.star-co.net.kp 175.45.178.57 25,587 Postfix mail.star-co.net.kp 175.45.178.55 Postfix mail.silibank.net.kp 175.45.177.33 25 Postfix So far, nothing spectacular, until we look at the TLS certificate. The…

  Why Is a North Korean Mail Server Using a .cc Domain? — Synaptic Security · under “mail.silibank.net.kp” · published 2026-01-27 · pulled 2026-09-12

• …The email in question originated from a @star-co.net.kp address with an origin IP of 175.45.178.55 and an internal relay of 172.31.6.4 .…

  Made for Export: North Korea’s Software Catalog — NKInternet · under “Made for Export: North Korea’s Software Catalog” · published 2026-03-10 · pulled 2026-09-12

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Related indicators

Cited by the same report: Why Is a North Korean Mail Server Using a .cc Domain?

Synaptic Security lists 5 other indicators in this source.

• mab@silibank.net.kp email address
• ryongnamsan@star-co.net.kp email address
• 175.45.177.33 IP address
• 175.45.178.56 IP address
• 175.45.178.57 IP address