#404error

Live, measured metrics for the hashtag #404error 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 #404error

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.

$110.68/ year · 8-character #name
Claim #404error — $110.68/yr→Buy on hashtag.space (web3)
card via hashtag.org · tokens via hashtag.space
1
Uses / 7 days
Mastodon
1
Accounts / 7 days
Mastodon
40
Recent posts
Mastodon
~0/hr
Recent pace
Mastodon · last 40
0
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 2026-09-28 19:00 UTC
1
09-22
0
09-23
0
09-24
0
09-25
0
09-26
0
09-27
0
09-28

1 uses by 1 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 2026-09-28 19:00 UTC
#error404
1 uses · 1 accounts / 7d
#ConsentIsA404Error
0 uses · 0 accounts / 7d
#cutie_streetメンバーがナースや恋に悩む女子に変身_最新曲_error404_mv解禁
0 uses · 0 accounts / 7d
#cutie_street_silent_sirenすぅが作詞を手がけるポップラブソング_error404_配信
0 uses · 0 accounts / 7d
#error404winternotfound
0 uses · 0 accounts / 7d
#error404thoughtnotfound
0 uses · 0 accounts / 7d
#pagenotfound404error
0 uses · 0 accounts / 7d
#Error404Centre
0 uses · 0 accounts / 7d
#404_error
0 uses · 0 accounts / 7d
#error404fullprice
0 uses · 0 accounts / 7d
#error404sleepnotfound
0 uses · 0 accounts / 7d
#PageNotFoundError404
0 uses · 0 accounts / 7d

Live pulse

measured · mastodon.online (Mastodon tag timeline) · fetched 2026-09-28 19:00 UTC

Everything below is measured over the latest 40 public posts (spanning ~9768 hours).

Posting hours (UTC) — busiest: 08:00

00:0012:0023:00

Languages: English (32) · German (5) · French (2) · Vietnamese (1)

Avg boosts / post: 0.2

Top of the latest posts

  • 🚨 Oh, joy! Another 404 🛑 masquerading as an intellectual exercise. Apparently, the secret to remembering π's first 100 digits is to not exist at all. Who knew the 'appropriate representation' of memory engineering was a blank page? 🙄 htt

    N-gated Hacker News@[email protected]♥ 0↻ 02026-09-22 08:20 UTCView post →

  • RE: https://flipboard.com/@euronewsde/europe-explained-9r4jiqcqz/-/a-3-pq1JA7RnKxSvYQPpJ2Bw%3Aa%3A89341092-%2F0 404 Millionen wäre um einiges witziger gewesen! #404error

    Paddy@[email protected]♥ 0↻ 02026-09-21 11:42 UTCView post →

  • la page d’#erreur404 / #404error du Victorian Trades Hall Council (la centrale syndicale de l’état de Victoria, en Australie) : https://www.weareunion.org.au/error #supportWikiUnion

    sukkoria@[email protected]♥ 0↻ 22026-09-16 21:43 UTCView post →

What “404error” means

Wiktionary · Wikipedia

error/ˈɛɹə(ɹ)/

  • nounThe state, quality, or condition of being wrong.
  • verbTo function improperly due to an error, especially accompanied by error message.
Full entry on Wiktionary →

An error is an inaccurate or incorrect action, thought, or judgement.

“Error” on Wikipedia (CC BY-SA) →

#404error across platforms

every network with a public tag surface

Follow #404error 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/404error