How popular is #feff?

#feff has no measured public activity on the open social web in the last 7 days. It is currently wide open.

What hashtags are related to #feff?

No related hashtags with measured usage were found for #feff.

How much does it cost to own #feff?

#feff 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=feff or with tokens on hashtag.space at https://hashtag.space/#feff.

#feff

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

Live, measured metrics for the hashtag #feff 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 #feff

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

card via hashtag.org · tokens via hashtag.space

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Uses / 7 days

Mastodon

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Accounts / 7 days

Mastodon

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Day-by-day usage

measured · mastodon.social (Mastodon public tags API) · fetched 2026-08-11 02:21 UTC

No measured public usage for #feff in the last 7 days. That is a real result, and a good one to know: this hashtag is wide open right now. We show a dash before we ever show a made-up number. Browse the trending index for tags with live measurements.

Related hashtags

measured · mastodon.social (Mastodon public search API) · fetched 2026-08-11 02:21 UTC

No related tags with measured usage found for #feff.

Live pulse

measured · Mastodon tag timeline · fetched 2026-08-11 02:21 UTC

No recent public posts found for #feff on Mastodon. Nothing measured, so nothing shown.

What “feff” means

Wikipedia

The byte order mark (BOM) is a particular usage of the special Unicode character code, U+FEFF ZERO WIDTH NO-BREAK SPACE, whose appearance as a magic number at the start of a text stream can signal several things to a program reading the text:the byte order, or endianness, of the text stream in the cases of 16-bit and 32-bit encodings; the fact that the text stream's encoding is Unicode, to a high level of confidence; which Unicode character encoding is used.

“Byte order mark” on Wikipedia (CC BY-SA) →

#feff across platforms

every network with a public tag surface

Follow #feff 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/feff