#ctf

Live, measured metrics for the hashtag #ctf 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 #ctf

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 #ctf — $5,313.74/yr→Buy on hashtag.space (web3)
card via hashtag.org · tokens via hashtag.space
14
Uses / 7 days
Mastodon
12
Accounts / 7 days
Mastodon
40
Recent posts
Mastodon
~0.1/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 2026-09-09 00:01 UTC
3
09-03
1
09-04
1
09-05
1
09-06
3
09-07
5
09-08
0
09-09

14 uses by 12 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 2026-09-09 00:01 UTC
#ctfitness
1 uses · 1 accounts / 7d
#ctfdesign
0 uses · 0 accounts / 7d
#CTFood
0 uses · 0 accounts / 7d
#CTFoodie
0 uses · 0 accounts / 7d
#ctfroom
0 uses · 0 accounts / 7d
#CTFC
0 uses · 0 accounts / 7d
#picoCTF
0 uses · 0 accounts / 7d
#CTFs
0 uses · 0 accounts / 7d
#ctfrancia
0 uses · 0 accounts / 7d
#codegate_2026_ctf_世界1位_株式会社ikotas_labsのメンバーが参加する日本チームがaiハッカーに勝利し_賞金5
0 uses · 0 accounts / 7d
#minetest_ctf
0 uses · 0 accounts / 7d
#ai_ctf
0 uses · 0 accounts / 7d

Live pulse

measured · mastodon.online (Mastodon tag timeline) · fetched 2026-09-09 00:01 UTC

Everything below is measured over the latest 40 public posts (spanning ~726 hours).

Posting hours (UTC) — busiest: 15:00

00:0012:0023:00

Languages: English (31) · German (5) · Spanish (1) · Russian (1) · French (1)

Avg boosts / post: 1

Top of the latest posts

  • #introduction Final-year CS student pivoting hard into offensive security. Currently working through the TryHackMe Jr Pentester path and learning Burp Suite properly instead of clicking buttons and hoping. Also grinding DSA in Java, which I

    Noir@[email protected]♥ 8↻ 72026-08-09 16:50 UTCView post →

  • Recap: I figured out the encryption scheme for the config section of the vendor-provided firmware image and recovered the encryption key. I love it when vendors don’t use proper crypto but revert to a 16th century cipher to create a fun #CT

    rumpel@[email protected]♥ 1↻ 02026-08-22 08:00 UTCView post →

  • Ya arreglé el #CTF estaba roto porque en la última fase no permitía terminar y claro tampoco accedía al ranking, me lo dijo uno que se lo pasó. https://ctf.manalejandro.com

    ale@[email protected]♥ 0↻ 02026-09-08 22:54 UTCView post →

#ctf across platforms

every network with a public tag surface

Follow #ctf 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/ctf