#callbacks
Live, measured metrics for the hashtag #callbacks from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #callbacks
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Day-by-day usage
measured · mastodon.social (Mastodon public tags API) · fetched 2026-07-27 12:00 UTC0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
Related hashtags
measured · mastodon.social (Mastodon public search API) · fetched 2026-07-27 12:00 UTCLive pulse
measured · mastodon.social (Mastodon tag timeline) · fetched 2026-07-27 12:00 UTCEverything below is measured over the latest 32 public posts (spanning ~69257 hours).
Posting hours (UTC) — busiest: 18:00
Languages: English (24) · French (2) · Russian (1) · German (1)
Avg boosts / post: 0.4
Top of the latest posts
I interpret the following Apr 20 18:38:09 skapet spamd[52874]: (GREY) 117.53.153.22: <> -> <[email protected]> As a sign there are still, er, individuals out there who think SMTP callbacks were a
For further notes going back to 2017, see "Twenty-plus years on, SMTP callbacks are still pointless and need to die" https://nxdomain.no/~peter/twenty-plus_years_on_smtp_callbacks_are_still_pointless.html #spam #smtp #smtpcallbacks #callbac
A couple more old #mail and #spam rants liberated, "Twenty-plus years on, SMTP callbacks are still pointless and need to die" (2017) https://nxdomain.no/~peter/twenty-plus_years_on_smtp_callbacks_are_still_pointless.html and "A Life Lesson
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/callbacks