pi (noun): The 16th letter of the Classical and Modern Greek alphabets and the seventeenth in Old Greek. As a hashtag, #99pi carries this topic across social platforms.

How popular is #99pi?

In the last 7 days, #99pi was used 2 times by 2 accounts on the open social web, measured via fosstodon.org (Mastodon public tags API).

What hashtags are related to #99pi?

No related hashtags with measured usage were found for #99pi.

How much does it cost to own #99pi?

#99pi is available as a #name from $2,449.80 per year. You can claim it by card at https://hashtag.org/checkout/portal-name?name=99pi or with tokens on hashtag.space at https://hashtag.space/#99pi.

#99pi

Name: #99pi — a #name on hashtag.org
Brand: hashtag.org
Price: 2449.80 USD
Availability: InStock

Live, measured metrics for the hashtag #99pi 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 #99pi

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.

$2,449.80/ year · 4-character #name

Claim #99pi — $2,449.80/yr→Buy on hashtag.space (web3)

card via hashtag.org · tokens via hashtag.space

Uses / 7 days

Mastodon

Accounts / 7 days

Mastodon

Day-by-day usage

measured · fosstodon.org (Mastodon public tags API) · fetched 2026-09-27 06:13 UTC

09-21

09-22

09-23

09-24

09-25

09-26

09-27

2 uses by 2 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 2026-09-27 06:13 UTC

No related tags with measured usage found for #99pi.

Live pulse

measured · fosstodon.org (Mastodon tag timeline) · fetched 2026-09-27 06:13 UTC

Everything below is measured over the latest 40 public posts (spanning ~18195 hours).

Posting hours (UTC) — busiest: 21:00

00:0012:0023:00

Languages: English (38) · German (2)

Avg boosts / post: 0.6

Used together with

#podcast ×6 #99percentinvisible ×5 #romanmars ×4 #urbanism ×2 #urbanplanning ×2 #architecture ×2 #icecream ×1 #2solitudes ×1 #oscarthegrouchday ×1 #annakode ×1 #emdash ×1 #amdash ×1

What “99pi” means

Wiktionary · Wikipedia

pi/paɪ/

nounThe 16th letter of the Classical and Modern Greek alphabets and the seventeenth in Old Greek.
verbTo spill or mix printing type.

Full entry on Wiktionary →

The number π is a mathematical constant that is the ratio of a circle's circumference to its diameter. It is approximately equal to: 3.141592653589793238462643383279...

“Pi” on Wikipedia (CC BY-SA) →

#99pi across platforms

every network with a public tag surface

Follow #99pi 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/99pi