#z21

Live, measured metrics for the hashtag #z21 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 #z21

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 #z21 — $5,313.74/yr→Buy on hashtag.space (web3)
card via hashtag.org · tokens via hashtag.space
0
Uses / 7 days
Mastodon
0
Accounts / 7 days
Mastodon
3
Recent posts
Mastodon
~0/hr
Recent pace
Mastodon · last 3
0.3
Avg reactions / post
Mastodon · last 3
—
Reddit posts / month
Reddit search
—
Open-web mentions
hashtag.org Firehose

Day-by-day usage

measured · mastodon.social (Mastodon public tags API) · fetched 2026-10-03 23:04 UTC
0
09-27
0
09-28
0
09-29
0
09-30
0
10-01
0
10-02
0
10-03

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 2026-10-03 23:04 UTC
#z2109
0 uses · 0 accounts / 7d
#z21122
0 uses · 0 accounts / 7d
#z21121
0 uses · 0 accounts / 7d
#Z210
0 uses · 0 accounts / 7d

Live pulse

measured · mastodon.social (Mastodon tag timeline) · fetched 2026-10-03 23:04 UTC

Everything below is measured over the latest 3 public posts (spanning ~29470 hours).

Posting hours (UTC)

00:0012:0023:00

Languages: English (2) · German (1)

Avg boosts / post: 0.7

Top of the latest posts

  • Light Lens Lab 75mm f/1.5 ‘Z21’ Prime Has An Entirely Original Optical Design https://petapixel.com/2026/06/04/light-lens-lab-75mm-f-1-5-z21-prime-has-an-entirely-original-optical-design/ #lightlenslab75mmf15z21 #Miscellaneous #lightlenslab

    Unofficial PetaPixel Bot@[email protected]♥ 1↻ 02026-06-05 04:15 UTCView post →

  • "Z21/JMRI in a box" finished. A Thomann Flightcase containing a Z21 DCC central, a small Computer with Touchscreen running JMRI on Linux Mint, a WiFi Router and a CAN interface for OpenLCB/LCC. All needed connections available on the top pa

    Nils Pickert 🚂@[email protected]♥ 0↻ 22026-09-22 20:22 UTCView post →

  • Have really enjoyed getting back into a H0 model train project. Reading, research and watching the trains do laps for hours. In a few weeks will be taking the plunge into digital! Bring on the decoders! #H0Trains #modeltrains #Z21 # ProfiTr

    TJ@[email protected]♥ 0↻ 02023-05-13 22:02 UTCView post →

#z21 across platforms

every network with a public tag surface

Follow #z21 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/z21