#40c3

Live, measured metrics for the hashtag #40c3 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 #40c3

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.

$2,449.80/ year · 4-character #name
Claim #40c3 — $2,449.80/yr→Buy on hashtag.space (web3)
card via hashtag.org · tokens via hashtag.space
53
Uses / 7 days
Mastodon
51
Accounts / 7 days
Mastodon
40
Recent posts
Mastodon
~0.4/hr
Recent pace
Mastodon · last 40
6.9
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 04:43 UTC
14
09-11
9
09-12
9
09-13
10
09-14
6
09-15
5
09-16
0
09-17

53 uses by 51 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 04:43 UTC
#40c3Planung
1 uses · 1 accounts / 7d
#fa331c3ed40
0 uses · 0 accounts / 7d
#a3dd40c18f3
0 uses · 0 accounts / 7d
#f1ed3d1c40b
0 uses · 0 accounts / 7d
#3c40b7
0 uses · 0 accounts / 7d
#3C40F6
0 uses · 0 accounts / 7d
#2a40c3
0 uses · 0 accounts / 7d
#c40d3c
0 uses · 0 accounts / 7d
#3C8B40
0 uses · 0 accounts / 7d
#C40BB3
0 uses · 0 accounts / 7d
#40C3DA
0 uses · 0 accounts / 7d
#6B40C3
0 uses · 0 accounts / 7d

Live pulse

measured · fosstodon.org (Mastodon tag timeline) · fetched 2026-09-17 04:43 UTC

Everything below is measured over the latest 40 public posts (spanning ~103 hours).

Posting hours (UTC) — busiest: 14:00

00:0012:0023:00

Languages: German (23) · English (17)

Avg boosts / post: 5.3

Top of the latest posts

  • This #Sticker for #40c3, anyone?

    derPUPE@[email protected]♥ 150↻ 632026-09-15 06:10 UTCView post →

  • Größtes nicht-kommerzielles Hackertreffen: CCC wechselt Veranstaltungsort für traditionsreichen Jahresendkongress #40c3 – CfP ist raus! https://www.heise.de/news/40C3-40-Chaos-Communication-Congress-zieht-in-die-Hamburger-Messehallen-um-114

    CCC@[email protected]♥ 73↻ 722026-09-13 15:51 UTCView post →

  • Egal wie alt ich werde - bei „Herald“ werde ich immer zuerst an civ2 denken. #40c3

    Katharina Nocun@[email protected]♥ 26↻ 02026-09-15 17:15 UTCView post →

#40c3 across platforms

every network with a public tag surface

Follow #40c3 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/40c3