#Underground

Live, measured metrics for the hashtag #Underground from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.

hashtag.org network · sponsored

Own #underground

This #name is available to claim. It becomes your portal on the open agent web: this very page, a keyword you rank for by an open public stake, and a verifiable identity for AI agents. Nobody else sells a page like this for every #name.

$10.85/ year · 11-character #name
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20
Uses / 7 days
Mastodon
20
Accounts / 7 days
Mastodon
40
Recent posts
Mastodon
~0.1/hr
Recent pace
Mastodon · last 40
0.1
Avg reactions / post
Mastodon · last 40
—
Reddit posts / month
Reddit search
—
Open-web mentions
hashtag.org Firehose

Day-by-day usage

measured · fosstodon.org (Mastodon public tags API) · fetched 2026-09-17 06:55 UTC
5
09-11
1
09-12
3
09-13
5
09-14
2
09-15
4
09-16
0
09-17

20 uses by 20 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.

Related hashtags

measured · fosstodon.org (Mastodon public search API) · fetched 2026-09-17 06:55 UTC
#underground_chucks
0 uses · 0 accounts / 7d
#GoingUnderground
1 uses · 1 accounts / 7d
#undergroundrap
4 uses · 4 accounts / 7d
#undergroundrailroad
0 uses · 0 accounts / 7d
#undergroundhiphop
4 uses · 4 accounts / 7d
#undergroundmetal
0 uses · 0 accounts / 7d
#undergroundstreams
0 uses · 0 accounts / 7d
#undergroundgreenhouses
0 uses · 0 accounts / 7d
#undergroundeconomy
0 uses · 0 accounts / 7d
#undergroundgourmet
2 uses · 2 accounts / 7d
#undergroundstation
1 uses · 1 accounts / 7d
#undergroundchucks
1 uses · 1 accounts / 7d

Live pulse

measured · fosstodon.org (Mastodon tag timeline) · fetched 2026-09-17 06:55 UTC

Everything below is measured over the latest 40 public posts (spanning ~336 hours).

Posting hours (UTC) — busiest: 20:00

00:0012:0023:00

Languages: English (31) · French (3) · Italian (1)

Avg boosts / post: 1.4

Top of the latest posts

  • Ce soir - 21h - Runderground - votre rendez-vous rock alternatif - www.run.be #radio #université #alternatif #musique #namur #rock #noise #experimental #metal #noiserock #underground #music #noisepunk #indie BELGIUM ONE POINT PART28

    Ben Zoulk@[email protected]♥ 1↻ 12026-09-09 06:19 UTCView post →

  • EN LA CALIENTE TALES OF A REGGAETON WARRIOR a film by Fabien Pisani (first feature) Cuba-USA | documentary | color | Spanish – English | 85 min | 2024 #reggaeton #music-documentary #youth #rebellion #underground #Candyman #post-socialism #c

    AGF : poemproducer@[email protected]♥ 1↻ 12026-09-06 14:03 UTCView post →

  • Fotowalk Hamburg - Underground stop "Hafen City / Universität" #streetphotography #street #blackandwhite #blackandwhitephotography #noiretblanc #biancoenero #schwarzweiß #monochrome #architecture #architecturephotography #hamburg #railwayst

    Silver Fern@[email protected]♥ 0↻ 22026-09-16 20:59 UTCView post →

What “underground” means

Wiktionary

underground/ˈʌndəɡɹaʊnd/

  • nounAn underground railway, especially for mass transit of people in urban areas.
  • nounRegions beneath the surface of the earth, both natural (eg. caves) and man-made (eg. mines).
Full entry on Wiktionary →

#underground across platforms

every network with a public tag surface

Follow #underground straight to each platform’s own tag page. Where a platform publishes open data we measure it above; the rest lock their numbers behind paid APIs, so we link rather than guess.

X (Twitter) ↗Instagram ↗TikTok ↗Facebook ↗LinkedIn ↗YouTube ↗Threads ↗Bluesky ↗Mastodon ↗Reddit ↗Pinterest ↗Tumblr ↗

Every number above is measured from a named public API at the shown fetch time. Nothing is estimated or extrapolated. Platforms that lock their data behind paid APIs are not shown. Agents: the same numbers, as JSON, at /api/hashtags/underground