r/mainframe
ActiveMainframe computing - where uptime is measured in years
Discussion of all things Mainframe - hardware & software, programming & support.
Members
8,030
as of February 2025
Last post
today
September 28, 2026
Posts (30 days)
42
Created
2010
August 6, 2010
Total posts
2.8K
archived
Total comments
23.2K
archived
Is r/mainframe dead? Active community.
r/mainframe is posting regularly — the latest post was today. Active subreddits can't be requested through r/redditrequest.
Find abandoned subreddits in this niche you can claim →r/mainframe activity over the last year
New posts per month.
Frequently asked questions about r/mainframe
How many members does r/mainframe have?
r/mainframe had 8,030 members as of February 2025, the most recent archive crawl of its subscriber count.
Is r/mainframe dead?
No. r/mainframe is active — the most recent post was today, with 42 posts in the last 30 days.
When was r/mainframe created?
r/mainframe was created on August 6, 2010.
Can I take over r/mainframe?
Probably not. r/mainframe is still in active use, and Reddit only hands over communities whose human moderators have all gone inactive on Reddit for 60+ days. If you want a community in this niche, look for abandoned subreddits on the same topic instead — DeadSubs finds them automatically.
Want your own subreddit with a built-in audience?
Thousands of subreddits like r/mainframe have been abandoned by their moderators. DeadSubs finds the ones you can claim.
Activity checked September 28, 2026from the Arctic Shift Reddit archive. Member counts come from the archive's most recent crawl and may lag Reddit. DeadSubs is not affiliated with Reddit Inc.