#subdomains

Live, measured metrics for the hashtag #subdomains 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 #subdomains

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.

$23.52/ year · 10-character #name
Claim #subdomains — $23.52/yr→Buy on hashtag.space (web3)
card via hashtag.org · tokens via hashtag.space
0
Uses / 7 days
Mastodon
0
Accounts / 7 days
Mastodon
21
Recent posts
Mastodon
~0/hr
Recent pace
Mastodon · last 21
0.3
Avg reactions / post
Mastodon · last 21
—
Reddit posts / month
Reddit search
—
Open-web mentions
hashtag.org Firehose

Day-by-day usage

measured · mas.to (Mastodon public tags API) · fetched 2026-10-15 21:52 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 · mas.to (Mastodon public search API) · fetched 2026-10-15 21:52 UTC

Live pulse

measured · mas.to (Mastodon tag timeline) · fetched 2026-10-15 21:52 UTC

Everything below is measured over the latest 21 public posts (spanning ~49413 hours).

Posting hours (UTC) — busiest: 14:00

00:0012:0023:00

Languages: English (19) · German (1)

Avg boosts / post: 2.7

Top of the latest posts

  • I should not come up with Good Ideas in the small hours of the morning when I'm half asleep.. They may not always be such.. Anyway, if anybody is considering setting up a fediverse server, and fancies a free hostname/subdomain under .socl.u

    Rob\Viewdata UK@[email protected]♥ 5↻ 32022-11-17 19:14 UTCView post →
  • I recently made a highly efficient subdomain discovery wordlist by scanning the entire IPv4 space for SSL certs. I've written a full article on the project, which is, in fact, my first public InfoSec article ever! I would love to hear what

    n0kovo 🇩🇰​:anarchy:​:comm:​:terminal:​:vegan:​:debian:​:python:​:tor:​:signal:@[email protected]♥ 1↻ 382023-01-22 06:14 UTCView post →
  • 🥴 Oh joy, another riveting episode of "Why Nobody Wants to Visit Your Wiki" airs, featuring Google's latest reality show—"Google Jail" for wikis! 🎉 Spoiler: The climax is a thrilling saga of #subdomains vs. root domains, but don't worry,

    N-gated Hacker News@[email protected]♥ 0↻ 02026-09-08 07:48 UTCView post →

What “subdomains” means

Wiktionary · Wikipedia

subdomains

  • nounA domain or sphere that is part of a larger domain or sphere.
Full entry on Wiktionary →

In the Domain Name System (DNS) hierarchy, a subdomain is a domain that is a part of another (main) domain. For example, if a domain offered an online store as part of their website example.com, it might use the subdomain shop.example.com.

“Subdomain” on Wikipedia (CC BY-SA) →

#subdomains across platforms

every network with a public tag surface

Follow #subdomains 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/subdomains