#callsign

Live, measured metrics for the hashtag #callsign 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 #callsign

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 #callsign — $110.68/yr→Buy on hashtag.space (web3)
card via hashtag.org · tokens via hashtag.space
0
Uses / 7 days
Mastodon
0
Accounts / 7 days
Mastodon
30
Recent posts
Mastodon
~0/hr
Recent pace
Mastodon · last 30
0.1
Avg reactions / post
Mastodon · last 30
—
Reddit posts / month
Reddit search
—
Open-web mentions
hashtag.org Firehose

Day-by-day usage

measured · fosstodon.org (Mastodon public tags API) · fetched 2026-10-15 04:02 UTC
0
10-09
0
10-10
0
10-11
0
10-12
0
10-13
0
10-14
0
10-15

0 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 2026-10-15 04:02 UTC
#callsignbootshine
0 uses · 0 accounts / 7d
#ProjectCallsign
0 uses · 0 accounts / 7d
#CallSignV7A4949
0 uses · 0 accounts / 7d
#callsignnerd
0 uses · 0 accounts / 7d
#callsignchange
0 uses · 0 accounts / 7d
#callsignidentification
0 uses · 0 accounts / 7d
#getYourCallsign
0 uses · 0 accounts / 7d
#WinlinkCallsignEmail
0 uses · 0 accounts / 7d
#Callsigns
0 uses · 0 accounts / 7d
#callsignature
0 uses · 0 accounts / 7d

Live pulse

measured · fosstodon.org (Mastodon tag timeline) · fetched 2026-10-15 04:02 UTC

Everything below is measured over the latest 30 public posts (spanning ~55589 hours).

Posting hours (UTC) — busiest: 17:00

00:0012:0023:00

Languages: English (25) · German (3) · Polish (1) · French (1)

Avg boosts / post: 0.7

Top of the latest posts

  • #callsign #saq #sweden #ulf #radio #17khz #hamradio #AmateurRadio https://alexander.n.se/en/ https://en.m.wikipedia.org/wiki/Grimeton_Radio_Station how to receive a 17kHz radio signal will basic kit: https://youtu.be/BL75QR8RI5s?si=vFS6CQRy

    adingbatponder :nixos: 👾@adingbatponder♥ 3↻ 22024-12-15 11:48 UTCView post →

  • #introduction 🐘 Bonjour à tous! 👇 @u4y0u 🔻🐢 φ Ѵ #Orléans #Loiret #RégionCentreValdeLoire #France 🏞️🎑🌄🇫🇷 #cartographie #OSM #Mapillary 🌐🌎🌍🌏📷📹 #telco #Ham #callsign F4AHW 🎙️📡📻 #electronic 🎞️🪛 #smartphone #privacyOS📱👁️🔒

    @Eric.B ©️@[email protected]♥ 1↻ 02022-12-26 14:54 UTCView post →

  • I moved, so I got a new #callsign. #hamradio

    zem@[email protected]♥ 0↻ 02026-03-31 00:26 UTCView post →

What “callsign” means

Wiktionary · Wikipedia

callsign

  • nounA combination of letters and numbers used to identify a radio or television station.
Full entry on Wiktionary →

In broadcasting and radio communications, a call sign is a unique identifier for a transmitter station. A call sign can be formally assigned by a government agency, informally adopted by individuals or organizations, or even cryptographically encoded to disguise a station's identity.

“Call sign” on Wikipedia (CC BY-SA) →

#callsign across platforms

every network with a public tag surface

Follow #callsign 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/callsign