Free Network, DNS & WHOIS Lookup Tools
Look up who registered a domain and when it expires with WHOIS, query DNS records such as A, MX, TXT and CNAME, find the approximate location of an IP address, and calculate CIDR subnet ranges. These tools query public registries from our server and show you the raw answer.
My IP Address & User Agent Inspector
Inspect your public IPv4/IPv6 address, browser user-agent header, and request metadata.
WHOIS Domain Registration Lookup
Query domain registration details, creation dates, registrar info, and name servers.
DNS Record Checker (A, AAAA, MX, TXT, NS)
Query domain DNS records including A, AAAA, MX mail servers, TXT records, and CNAME aliases.
IP Geolocation & ISP Finder
Find approximate geographic city, country, postal code, ASN, and ISP details for any IP.
CIDR Subnet & IP Range Calculator
Calculate IP subnet mask, network address, broadcast address, and host IP ranges.
HTTP Status Code Reference & Search
Search HTTP response status codes (1xx, 2xx, 3xx, 4xx, 5xx) with RFC specifications.
User-Agent String Parser
Parse browser name, engine, operating system, and device type from User-Agent strings.
MIME Type & File Extension Reference
Lookup Content-Type MIME headers for file extensions (.json, .png, .pdf, .wasm).