Gatecko Tools
Fast network diagnostics from the Cloudflare edge.
Tools
What is my IP
See your public IP address, ASN, country and request headers.
DNS Lookup
Query A, AAAA, MX, TXT, NS and CAA records.
HTTP Header Analyzer
Inspect status code and response headers.
Security Headers Scanner
Check basic security headers and generate a simple score.
Latest Guides
Explanations of core networking and security concepts.
What is DNS?
How domain names resolve to IP addresses and what each record type does.
What is an ASN?
How Autonomous System Numbers identify network operators worldwide.
What is an HTTP Header?
Request and response headers — caching, content type and security.
What is CSP?
How Content Security Policy protects sites from XSS attacks.
What is HSTS?
How Strict Transport Security prevents protocol downgrade attacks.
About these tools
Gatecko Tools runs entirely on Cloudflare Workers — no backend servers, no databases. Every diagnostic request is processed at the Cloudflare edge closest to you, which means results are fast and reflect real network conditions.
All tools are free to use. No login required. Your IP and request data are never stored.