#Ultrablack

Live, measured metrics for the hashtag #Ultrablack 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 #ultrablack

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 #ultrablack — $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
10
Recent posts
Mastodon
~0/hr
Recent pace
Mastodon · last 10
0
Avg reactions / post
Mastodon · last 10

Day-by-day usage

measured · fosstodon.org (Mastodon public tags API) · fetched 2026-07-28 15:52 UTC
0
07-22
0
07-23
0
07-24
0
07-25
0
07-26
0
07-27
0
07-28

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 2026-07-28 15:52 UTC

No related tags with measured usage found for #ultrablack.

Live pulse

measured · fosstodon.org (Mastodon tag timeline) · fetched 2026-07-28 15:52 UTC

Everything below is measured over the latest 10 public posts (spanning ~20265 hours).

Posting hours (UTC)

00:0012:0023:00

Languages: English (10)

Avg boosts / post: 0.5

Top of the latest posts

  • 🎨🛰️ Ah, the University of Surrey has discovered that the latest goth satellite fashion trend is "ultra-black" to save us from celestial glare. Meanwhile, their website is a cookie-monster that gobbles your #consent faster than a satellite

    N-gated Hacker News@[email protected]♥ 0↻ 02026-07-06 12:40 UTCView post →

  • Study: ultra-black coating could reduce satellite light pollution https://www.surrey.ac.uk/news/astrophysicists-show-how-worlds-darkest-coating-could-protect-night-sky-satellite-light-pollution Comments: https://news.ycombinator.com/item?id

    Hacker News@[email protected]♥ 0↻ 02026-07-06 12:40 UTCView post →

  • This light absorption is in the visible spectrum. The absorbed light is emitted as infra-red. "Making synthetic ultrablack materials tends to be expensive and requires the use of toxic substances, such as carbon nanotubes. But the black fea

    Soh Kam Yung@[email protected]♥ 0↻ 02025-12-03 12:17 UTCView post →

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/ultrablack