Contact Me

One thing that I realized after a while in the mainframe community is that people are open to questions. If you have any questions, feel free to reach out to me and I’ll gladly answer them.

Email

Send me an email and I'll get back to you at my earliest convenience.

You can also send encrypted emails using my OpenPGP public keys. Please include your own public key if you want replies encrypted.

Key A: B25E CFC6 9E10 33FA
Key B: 2FB7 7A8F 827D 7A42

ActivityPub

I self-host a personal GoToSocial instance, connectable via Mastodon, Pleroma, Misskey, and other ActivityPub apps.

social.securitypuppy.com/@hartanto

Snail Mail

Alternatively — it may take a while, but include a return address for replies.

Hartanto Ario Widjaya
387 Joo Chiat Road, #02-11
MPB 1904
Singapore 427623

Any views or opinions represented on this website are personal and do not represent those of individuals or organizations that I am associated with.