#s21

Live, measured metrics for the hashtag #s21 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 #s21

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.

$5,313.74/ year · 3-character #name
Claim #s21 — $5,313.74/yr→Buy on hashtag.space (web3)
card via hashtag.org · tokens via hashtag.space
2
Uses / 7 days
Mastodon
2
Accounts / 7 days
Mastodon
40
Recent posts
Mastodon
~0/hr
Recent pace
Mastodon · last 40
0.6
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 2026-11-10 07:06 UTC
0
11-04
0
11-05
1
11-06
0
11-07
1
11-08
0
11-09
0
11-10

2 uses by 2 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 2026-11-10 07:06 UTC
#s25e21
0 uses · 0 accounts / 7d
#S07E21
0 uses · 0 accounts / 7d
#s02e21
4 uses · 2 accounts / 7d
#s06e21
0 uses · 0 accounts / 7d
#s21e04
0 uses · 0 accounts / 7d
#republicofirelandunder21s
0 uses · 0 accounts / 7d
#U21s
0 uses · 0 accounts / 7d
#s21transcriber
0 uses · 0 accounts / 7d
#SCO21s
0 uses · 0 accounts / 7d
#LFCU21s
0 uses · 0 accounts / 7d
#acampada21s
0 uses · 0 accounts / 7d
#englandu21s
0 uses · 0 accounts / 7d

Live pulse

measured · fosstodon.org (Mastodon tag timeline) · fetched 2026-11-10 07:06 UTC

Everything below is measured over the latest 40 public posts (spanning ~2769 hours).

Posting hours (UTC) — busiest: 12:00

00:0012:0023:00

Languages: German (33) · English (6) · Russian (1)

Avg boosts / post: 1.7

Top of the latest posts

  • For those of you who have experienced the wonder of #Stuttgart #S21, there is now a demo available of a simulator. For those of you who have not yet had the unalloyed pleasure of experiencing #S21, Germany’s premier and much-publicised stat

    Moof! :progresspride: 🔜 UK@[email protected]♥ 12↻ 142026-08-20 13:01 UTCView post →

  • Die #DB sollte sich echt mal in #Zuffenhausen anschauen, wie es aussieht, wenn eine komplette S-Bahn-Landung von Menschen, die wegen eines ausgefallenen Zuges erst auf Gleis 11 warten, plötzlich alle sofort auf Gleis 12 latschen müssen ...

    🇱 🇴 🇧​​ ┏∏━┓⇈@[email protected]♥ 3↻ 32026-07-16 06:10 UTCView post →

  • Am 30. September 2010 kam es in Stuttgart zum „Schwarzen Donnerstag“. Am späten Vormittag fand in der Nähe des Schlossgartens, der für das Immobilienprojekt Stuttgart 21 zerstört werden sollte, eine Schülerdemonstration mit Hunderten Schüle

    🇱 🇴 🇧​​ ┏∏━┓⇈@[email protected]♥ 2↻ 42026-09-29 23:12 UTCView post →

#s21 across platforms

every network with a public tag surface

Follow #s21 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/s21