#deltiology

Live, measured metrics for the hashtag #deltiology 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 #deltiology

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 #deltiology — $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
18
Recent posts
Mastodon
~0/hr
Recent pace
Mastodon · last 18
0.1
Avg reactions / post
Mastodon · last 18
—
Reddit posts / month
Reddit search
—
Open-web mentions
hashtag.org Firehose

Day-by-day usage

measured · mastodon.online (Mastodon public tags API) · fetched 2026-10-18 07:12 UTC
0
10-12
0
10-13
0
10-14
0
10-15
0
10-16
0
10-17
0
10-18

0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.

Related hashtags

measured · mastodon.online (Mastodon public search API) · fetched 2026-10-18 07:12 UTC

No related tags with measured usage found for #deltiology.

Live pulse

measured · mastodon.online (Mastodon tag timeline) · fetched 2026-10-18 07:12 UTC

Everything below is measured over the latest 18 public posts (spanning ~33403 hours).

Posting hours (UTC) — busiest: 10:00

00:0012:0023:00

Languages: English (16) · German (2)

Avg boosts / post: 0.9

Top of the latest posts

  • Neu in der Ansichtskartensammlung: Ein Blick auf den offenbar sehr dynamischen Opernball des Jahres 1970 in der Berliner #Staatsoper. (#GraphokopieHSander, 1970. Foto: Marion Schöne / B 8/70 Best.-Nr. F 2656 h) Regelmäßige Updates zu meinem

    Ben Kaden@[email protected]♥ 1↻ 02022-11-18 16:17 UTCView post →

  • The Delagrange biplane https://www.cpaphil.com/en/vintage-postcard/cpa-avion-aviation-aeroplane-delagrange-4 #Aviation #Delagrange #VintagePostcard #EarlyAviation #AviationHistory #Biplane #Flying #Aviator #Aeronautics #AirHistory #VintageA

    Cpaphil@[email protected]♥ 0↻ 12026-09-05 17:31 UTCView post →

  • VINTAGE POSTCARD Fantaisie Dances Bouissavin Opera Dance https://www.cpaphil.com/en/products/vintage-postcard-fantaisie-dances-bouissavin-opera-dance https://www.paypal.com/ncp/payment/KQJ4EZFDP4YEL #VintagePostcard #AntiquePostcard #Postca

    Cpaphil@[email protected]♥ 0↻ 02025-10-01 18:04 UTCView post →

What “deltiology” means

Wikipedia

Deltiology is the study and collection of postcards. The word originated in 1945 from the collaboration of Rendell Rhoades (1914–1976) of Ohio and colleagues at Ohio State University.

“Deltiology” on Wikipedia (CC BY-SA) →

#deltiology across platforms

every network with a public tag surface

Follow #deltiology 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/deltiology