DNS Lookup

Simon Willison’s Weblog Subscribe Sponsored by: WorkOS — The infrastructure fast-growing B2B companies use to sell to Enterprise. TOOL DNS Lookup TIL that Cloudflare's 1.1.1.1 DNS service (and 1.1.1.2 and 1.1.1.3, which block malware and malware + adult content respectively) has a CORS-enabled JSON API, so I had Claude Code build me a UI for running DNS queries against all three of those resolvers. Posted 22nd March 2026 at 7:16 pm Recent articles Experimenting with Starlette 1.0 with Claude skills - 22nd March 2026 Profiling Hacker News users based on their comments - 21st March 2026 Thoughts on OpenAI acquiring Astral and uv/ruff/ty - 19th March 2026 This is a beat by Simon Willison, posted on 22nd March 2026. dns 32 cors 26 cloudflare 30 Monthly briefing Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments. Pay me to send you less! Sponsor & subscribe Disclosures Colophon © 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026