What's that referrer?
The hosts that show up in your sources and don't say where people really came from: what sends each one, what it hides, and how to tag your links so you know next time.
Search
- bing.com
A click on a Bing search result
- duckduckgo.com
A result clicked on the DuckDuckGo search engine
Social
- discord.com
A link clicked in Discord, or a return from signing in with Discord
- indiehackers.com
A link clicked on Indie Hackers: a post, a comment or a product listing
- l.facebook.com
A link clicked on Facebook, passed through Facebook's link shim
- l.instagram.com
A link tapped on Instagram, sent out through Instagram's redirect
- lnkd.in
A link clicked on LinkedIn, shortened by LinkedIn to lnkd.in
- medium.com
A link clicked in a story on Medium
- news.ycombinator.com
A link clicked on Hacker News
- out.reddit.com
A link clicked on Reddit, passed through Reddit's outbound redirect
- producthunt.com
A link clicked on Product Hunt
- substack.com
A link clicked in a Substack post read on the web
- t.co
A link clicked on X (Twitter), which wraps every link in t.co
- youtube.com
A link clicked on YouTube: a description, a comment or a channel page
AI assistants
- chatgpt.com
A link clicked in a ChatGPT answer
- copilot.microsoft.com
A source clicked in an answer from Microsoft Copilot
- perplexity.ai
A cited source clicked in a Perplexity answer
- android-app://com.google.android.gm
A link tapped in the Gmail app on Android
- mail.google.com
A link clicked in Gmail in a web browser
- outlook.live.com
A link clicked in Outlook on the web
Other websites and apps
- app.slack.com
A link clicked in Slack
- dev.to
A link clicked in an article or comment on DEV, the developer community
- github.com
A link clicked on GitHub: a README, an issue, a profile or a gist
- statics.teams.cdn.office.net
A link clicked in Microsoft Teams, passed through its link check