#JCON

Live, measured metrics for the hashtag #JCON 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 #jcon

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 #jcon — $2,449.80/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
0.2
Avg reactions / post
Mastodon · last 40
—
Reddit posts / month
Reddit search
—
Open-web mentions
hashtag.org Firehose

Day-by-day usage

measured · mastodon.online (Mastodon public tags API) · fetched 2026-09-25 20:20 UTC
0
09-19
0
09-20
2
09-21
0
09-22
0
09-23
0
09-24
0
09-25

2 uses by 2 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.

Related hashtags

measured · mastodon.online (Mastodon public search API) · fetched 2026-09-25 20:20 UTC
#jcon2026
2 uses · 2 accounts / 7d
#jcon2027
2 uses · 2 accounts / 7d
#jconusa26
8 uses · 7 accounts / 7d
#jconfdominicana
0 uses · 0 accounts / 7d
#jconddominicana
0 uses · 0 accounts / 7d
#JConaCRUTCH
0 uses · 0 accounts / 7d
#jcon2022
0 uses · 0 accounts / 7d
#JConvolver
0 uses · 0 accounts / 7d
#jconftoronto
0 uses · 0 accounts / 7d
#jconworld2023
0 uses · 0 accounts / 7d
#jconconference
0 uses · 0 accounts / 7d
#jconfbrasil
0 uses · 0 accounts / 7d

Live pulse

measured · mastodon.online (Mastodon tag timeline) · fetched 2026-09-25 20:20 UTC

Everything below is measured over the latest 40 public posts (spanning ~3760 hours).

Posting hours (UTC) — busiest: 07:00

00:0012:0023:00

Languages: English (29) · German (10)

Avg boosts / post: 0.7

Top of the latest posts

  • I completely forgot to take selfies with some of the people from the #Aachen Java community, whom I was also really happy to see! @rotnroll666 @DJGummikuh @khmarbaise Who else did I forget? @sepp @sippsack and others... Don’t be mad at me,

    Franz van Betteraey@[email protected]♥ 4↻ 02026-04-23 19:10 UTCView post →

  • My talk about #JSpecify from earlier this year https://youtu.be/V5N56NmGqCw at #JCon in Cologne. #Java

    Michael Simons@[email protected]♥ 1↻ 42026-07-03 07:51 UTCView post →

  • The date for #JCON EUROPE 2027 is locked! During #JCON2026 we already teased a “Save the Date” Now we can share the official dates of #JCON2027: 📅 April 26–29, 2027 📍 #Cinedom Cologne, Germany Ticket sales will start later this year. Mark

    JCON@[email protected]♥ 1↻ 22026-05-27 08:54 UTCView post →

#jcon across platforms

every network with a public tag surface

Follow #jcon 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/jcon