2026-08-01 crawl · observed, not inferred
Technology used by 221b.jp
15
technologies detected
Recent changes
Full detected stack
Everything detected on this domain in the latest monthly crawl, grouped by what it does. ↩ marks when we first observed it — no later than that date, not necessarily when they adopted it. Faded dates were seen in fewer than four crawls.
Mobile frameworks
Web servers
Tag managers
Font scripts
Widgets
JavaScript libraries
Analytics
Cookie compliance
Miscellaneous
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