HF Underground
HFUnderground is a forum for radio enthusiasts and experimenters who are interested in pirate radio and other fun stuff!
SoundboardNewsAnimated IconAuto ModerationInvite SplashCommunitycreated May 9, 2020id 708631906014593065
591
members
153
online now
25.9%
active ratio
72
legitimacy score
5
Nitro boosts
High
verification gate
1d ago
last measured
How the legitimacy score of 72 is calculated
Activity +35 25.9% onlineVerified / partner +0 noAge +15 6.3 yrSize +11 591 membersCommunity status +5 communityTrack record +6 measured 19 day(s) over 25d
📈 Measured live across 19 days (25d tracked, 21 snapshots).
Member history
Measured 23 times; its member count changed 4 times.
Invites seen
| Code | Type | Status | Last live |
|---|---|---|---|
| discord.gg/r6U6sf82wz | invite | live | 1d ago |
Same-operator servers
Other servers whose invites were created by the same account — often one operator or a network.
 HFUnderground.com | 173 |
Embed & API. 
<img src="https://guildregister.com/badge/708631906014593065.svg"> · JSON · Own this server? Claim itFirst seen Aug 10, 2026. Member and online counts are Discord's own approximate counts, measured from the public invite API. GuildRegister is not affiliated with Discord.