#ffff

Live, measured metrics for the hashtag #ffff 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 #ffff

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 #ffff — $2,449.80/yr→Buy on hashtag.space (web3)
card via hashtag.org · tokens via hashtag.space
0
Uses / 7 days
Mastodon
0
Accounts / 7 days
Mastodon
40
Recent posts
Mastodon
~0/hr
Recent pace
Mastodon · last 40
0.3
Avg reactions / post
Mastodon · last 40
—
Reddit posts / month
Reddit search
—
Open-web mentions
hashtag.org Firehose

Day-by-day usage

measured · mastodon.social (Mastodon public tags API) · fetched 2026-10-23 14:19 UTC
0
10-17
0
10-18
0
10-19
0
10-20
0
10-21
0
10-22
0
10-23

0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.

Related hashtags

measured · mastodon.social (Mastodon public search API) · fetched 2026-10-23 14:19 UTC
#ffff00
1 uses · 1 accounts / 7d
#FFFF79
1 uses · 1 accounts / 7d
#ffffff
1 uses · 1 accounts / 7d
#ffffffはまほう
0 uses · 0 accounts / 7d
#ffffb2240b5
5 uses · 5 accounts / 7d
#ffffuuuuuuu
1 uses · 1 accounts / 7d
#ffffc05faeb
0 uses · 0 accounts / 7d
#ffffffuuuuuuuuuuuuuuuuuuck
1 uses · 1 accounts / 7d
#fffff
0 uses · 0 accounts / 7d
#fffffe
0 uses · 0 accounts / 7d
#ffffff33
0 uses · 0 accounts / 7d
#ffffff0d
0 uses · 0 accounts / 7d

Live pulse

measured · mastodon.social (Mastodon tag timeline) · fetched 2026-10-23 14:19 UTC

Everything below is measured over the latest 40 public posts (spanning ~12994 hours).

Posting hours (UTC) — busiest: 13:00

00:0012:0023:00

Languages: Japanese (33) · English (3) · German (2) · Chinese (China) (1) · Catalan (1)

Avg boosts / post: 0

Top of the latest posts

  • I should mention, that I basically ignore comments from anyone who doesn't upload a profile picture. Like, I'm totally ok if the image is just #0000 or #ffff all the way through. But if I see that default Mastodon elephant, I am immediately

    Bradley M. Kühn@[email protected]♥ 12↻ 12026-04-18 23:46 UTCView post →

  • JANE DOE - 米津玄師, 宇多田ヒカル(Cover) / 日裏クロ, ファム・ファタル #FFFF https://vtubes.tokyo/XHAD

    jPoP Music - vTubes@jPoP_Music♥ 0↻ 02026-04-01 22:07 UTCView post →

  • 優しい彗星 – YOASOBI (Cover) / ファム・ファタル #FFFF https://vtubes.tokyo/3471147/

    jPoP Music - vTubes@jPoP_Music♥ 0↻ 02026-02-03 10:20 UTCView post →

What “ffff” means

Wikipedia

The dynamics of a piece of music is the variation in loudness between notes or phrases. Dynamics are indicated by specific musical notation, often in some detail. However, dynamics markings require interpretation by the performer depending on the musical context: a specific marking may correspond to a different volume between pieces or even sections of one piece. The execution of dynamics also extends beyond loudness to include changes in timbre and sometimes tempo rubato.

“Dynamics (music)” on Wikipedia (CC BY-SA) →

#ffff across platforms

every network with a public tag surface

Follow #ffff 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/ffff