#isdn
Live, measured metrics for the hashtag #isdn from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #isdn
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 · mas.to (Mastodon public tags API) · fetched 2026-10-19 06:56 UTC0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
Related hashtags
measured · mas.to (Mastodon public search API) · fetched 2026-10-19 06:56 UTCLive pulse
measured · mas.to (Mastodon tag timeline) · fetched 2026-10-19 06:56 UTCEverything below is measured over the latest 40 public posts (spanning ~8874 hours).
Posting hours (UTC) — busiest: 13:00
Languages: English (25) · German (11) · Japanese (2) · Spanish (1) · Russian (1)
Avg boosts / post: 7.4
Top of the latest posts
Just completed the disassembly of another two Siemens EWSD digital telephone exchanges, which are now in a truck on their way to the Telecom Museum Dresden (Fernmeldemuseum Dresden). Largest time sink was untangling the hundreds of cables (
Uns liegen geheime Informationen vor, aber hier, unter uns können wir es ja sagen: Beim #39c3 wird #ISDN ein echt großes Ding. Also schnell noch ein Euro-ISDN-Telefon* aus dem Keller holen oder günstig besorgen, bevor die Preise explodieren
Make sure to bring your modems, fax machines, ISDN terminal adapters, phones, BTX terminals, Minitel, video phones and other #retronetworking gear to #39C3 and get connected to the on-site #ISDN network. More information at https://isdn-mus
What “isdn” means
WikipediaIntegrated Services Digital Network (ISDN) is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the digitalised circuits of the public switched telephone network. Work on the standard began in 1980 at Bell Labs and was formally standardized in 1988 in the CCITT "Red Book". By the time the standard was released, newer networking systems with much greater speeds were available, and ISDN saw relatively little uptake in the
“ISDN” on Wikipedia (CC BY-SA) →#isdn across platforms
every network with a public tag surfaceFollow #isdn 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.
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/isdn