#cop21

Live, measured metrics for the hashtag #cop21 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 #cop21

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.

$1,129.43/ year · 5-character #name
Claim #cop21 — $1,129.43/yr→Buy on hashtag.space (web3)
card via hashtag.org · tokens via hashtag.space
3
Uses / 7 days
Mastodon
3
Accounts / 7 days
Mastodon
40
Recent posts
Mastodon
~0/hr
Recent pace
Mastodon · last 40
0.9
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 2026-11-13 02:40 UTC
0
11-07
0
11-08
0
11-09
0
11-10
2
11-11
1
11-12
0
11-13

3 uses by 3 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 2026-11-13 02:40 UTC
#anv_cop21
1 uses · 1 accounts / 7d
#cop21parisclimatechangeconference2015
1 uses · 1 accounts / 7d
#cop_21
0 uses · 0 accounts / 7d
#COP21Paris
0 uses · 0 accounts / 7d
#cop21unitednationsconference
0 uses · 0 accounts / 7d

Live pulse

measured · mastodon.online (Mastodon tag timeline) · fetched 2026-11-13 02:40 UTC

Everything below is measured over the latest 40 public posts (spanning ~14752 hours).

Posting hours (UTC) — busiest: 07:00

00:0012:0023:00

Languages: English (21) · French (9) · German (6) · Italian (1) · Japanese (1) · Dutch (1)

Avg boosts / post: 3.5

Top of the latest posts

  • Historique : alors que la COP30 et les dix ans de l'Accord de Paris sur le climat approchent, dix scientifiques passeront en procès en France et en Allemagne cette semaine pour avoir alerté sur la crise écologique en cours ! #climat #résist

    Scientifiques en rébellion@scientifiques_en_rebellion@piaille.fr♥ 25↻ 402025-10-05 21:16 UTCView post →

  • 🚨 Action en cours à l'Arc de Triomphe ! Il est temps d’écouter les voix des personnes qui sont particulièrement touchées par les conséquences du dérèglement climatique et qui sont en première ligne du sabotage climatique organisé par les r

    Action non-violente COP21@anvcop21@piaille.fr♥ 6↻ 52025-12-12 11:11 UTCView post →

  • It has been a decade since 195 countries committed in Paris to limit global temperature rise, and France has since embraced a leadership role by placing ecology at the center of its energy policy. https://www.japantimes.co.jp/commentary/202

    The Japan Times@thejapantimes@mastodon.social♥ 1↻ 12025-12-28 09:30 UTCView post →

What “cop21” means

Wiktionary

cop

  • nounA spider.
Full entry on Wiktionary →

#cop21 across platforms

every network with a public tag surface

Follow #cop21 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/cop21