Network tools

Quick checks for DNS, mail, TLS and HTTP configuration. Each tool is also available through the API.

Network

Geofeed checkerValidate an RFC 8805 geofeed DNS blocklist checkCheck an IPv4 address on 20 blocklists Subnet calculatorIPv4 and IPv6 ranges and masks

DNS and mail

DNS record lookupA, AAAA, MX, TXT, NS, CAA, SOA and more Mail configuration checkMX, SPF and DMARC in one check

Web

TLS certificate checkIssuer, validity and SAN names HTTP header checkServer, caching and security headers

Lookups

IP address lookupRegistration, routing and location What is my IPYour IPv4 and IPv6 address Bulk lookupUp to 500 addresses at once, CSV export