attr.so

attr.so is a live English-language website hosted on Amazon.com, Inc. (AS16509) in the United States, served by Vercel. cl0q first saw it on 2026-08-11 and last crawled it on 2026-08-11. It resolves to 216.198.79.1 and has mail (MX) records set up. Its favicon is fingerprinted by SHA-256, so you can find every other site that serves the same icon.

How the site describes itself:

Attr.so - Know where your clicks come from

Privacy-first shortlinks with click attribution. Branded short URLs, UTM tagging, custom domains, and a real REST API. Free for up to 50 links a month.