#21u

Live, measured metrics for the hashtag #21u 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 #21u

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 #21u — $5,313.74/yr→Buy on hashtag.space (web3)
card via hashtag.org · tokens via hashtag.space
10
Uses / 7 days
Mastodon
8
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.social (Mastodon public tags API) · fetched 2026-09-30 03:43 UTC
2
09-24
1
09-25
1
09-26
2
09-27
2
09-28
1
09-29
1
09-30

10 uses by 8 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 2026-09-30 03:43 UTC
#21Under21
0 uses · 0 accounts / 7d
#21uhrnonmention
0 uses · 0 accounts / 7d
#21uhr47nonmention
0 uses · 0 accounts / 7d
#21ux
0 uses · 0 accounts / 7d
#21unelfo
0 uses · 0 accounts / 7d
#21Uhr
0 uses · 0 accounts / 7d
#21uhr18nonmention
0 uses · 0 accounts / 7d
#21unity
0 uses · 0 accounts / 7d
#21up
0 uses · 0 accounts / 7d
#21US
0 uses · 0 accounts / 7d
#21ƯuDãiTôiMuaNgayBâyGiờ
0 uses · 0 accounts / 7d
#21underparinamajor
0 uses · 0 accounts / 7d

Live pulse

measured · mastodon.social (Mastodon tag timeline) · fetched 2026-09-30 03:43 UTC

Everything below is measured over the latest 40 public posts (spanning ~1930 hours).

Posting hours (UTC) — busiest: 13:00

00:0012:0023:00

Languages: English (37) · Japanese (3)

Avg boosts / post: 0.3

Top of the latest posts

  • https://www.wacoca.com/baseball/1409222/ WCBC初代王者の大学代表 着実な準備と継承される勝者のメンタリティーで栄光続く | 大学 | 総括 ##NPB ##プロ野球 #12U #15U #18U #21U #baseball #japan #JBMC #NPBエンタープライズ #SAMURAI #WBC #侍ジャパン #女子代表 #日本代表 #日本野球 #社会人代表 #野球

    Baseball Japan@[email protected]♥ 1↻ 02026-07-18 09:06 UTCView post →

  • https://www.walknews.com/1392588/ 関蓮太郎の本塁打や山口裕海のサヨナラ打などで粘り勝ち 地元メキシコとの全勝対決を制す | U-15 | 試合レポート #12U #15U #18U #21U #Japan #JBMC #Mexico #NPB #NPBエンタープライズ #SAMURAI #wbc #プロ野球 #メキシコ #侍ジャパン #女子代表 #日本代表 #日本野球 #社会人代表 #野球

    Walk News@[email protected]♥ 0↻ 02026-09-30 00:30 UTCView post →

  • https://www.wacoca.com/baseball/1428060/ 関蓮太郎の本塁打や山口裕海のサヨナラ打などで粘り勝ち 地元メキシコとの全勝対決を制す | U-15 | 試合レポート ##NPB ##プロ野球 #12U #15U #18U #21U #baseball #japan #JBMC #NPBエンタープライズ #SAMURAI #WBC #侍ジャパン #女子代表 #日本代表 #日本野球 #社会人代表 #野球

    Baseball Japan@[email protected]♥ 0↻ 22026-09-29 13:09 UTCView post →

#21u across platforms

every network with a public tag surface

Follow #21u 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/21u