#mc21
Live, measured metrics for the hashtag #mc21 from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #mc21
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.
Day-by-day usage
measured · fosstodon.org (Mastodon public tags API) · fetched 2026-07-27 20:23 UTC0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
Related hashtags
measured · fosstodon.org (Mastodon public search API) · fetched 2026-07-27 20:23 UTCNo related tags with measured usage found for #mc21.
Live pulse
measured · fosstodon.org (Mastodon tag timeline) · fetched 2026-07-27 20:23 UTCEverything below is measured over the latest 6 public posts (spanning ~55360 hours).
Posting hours (UTC)
Languages: English (6)
Avg boosts / post: 0
Top of the latest posts
Second import-substituted #MC21 takes flight! Oct 28: 1hr maiden flight from Irkutsk @ 500km/h, 3,500m. All-Russian: PD-14 engines, composite wing, avionics 2nd prototype joins 1st for cert testing. Deliveries soon! #Rostec #UAC https://def
Second Russian MC-21 Import-substituted Aircraft Takes to Flight https://defensemirror.com/news/40439/Second_Russian_MC_21_Import_substituted_Aircraft_Takes_to_Flight #MC21 #RussiaAviation #PD14 #UAC #Rostec #AircraftTesting #Irkutsk #Aeros
First Batch of 'Ready To Fly' Russian Engines Shipped For Installation on MC-21 Airliner https://defensemirror.com/news/38902/First_Batch_of__Ready_To_Fly__Russian_Engines_Shipped_For_Installation_on_MC_21_Airliner #PD14 #MC21 #sanctions #a
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/mc21