Network & DNS
Follow your public connection, resolve records and examine domain trust.
Tools by subcategory
12 focused tools, with an explanation and a practical guide for each check.
DNS records & domain policy
Explore public DNS records, DNSSEC evidence, domain names, CAA and cache lifetimes.
DNS record explorer
Query A, AAAA, MX, TXT, CAA and other DNS records with TTLs and resolver status.
Network requestNetworkDNSSEC inspector
Read a validating resolver’s AD flag and inspect DS, DNSKEY and signed answer records.
Network requestNetworkDomain name inspector
Inspect ASCII domain labels, IDN conversion and hostname length without performing a DNS lookup.
Local analysisNetworkCAA record analyser
Inspect CAA flags, issuer authorisations and reporting properties from pasted record values.
Local analysisNetworkDNS TTL calculator
Convert a TTL in seconds to readable units and an illustrative cache expiry time.
Local analysisIP addresses & networking
Check a public IP, calculate IPv4 subnets and understand IPv6 address notation.
Public IP & connection
Find the public IP seen by an external service and inspect your connection’s browser signals.
External IP lookupNetworkIPv4 subnet calculator
Calculate an IPv4 CIDR network, mask, broadcast address and usable host range.
Local analysisNetworkIPv6 address inspector
Expand and compress an IPv6 address and identify common address scopes.
Local analysisEmail authentication
Inspect email DNS and understand SPF, DKIM and DMARC policies.
Email domain security
Inspect MX, SPF, DMARC and a chosen DKIM selector with configuration-specific findings.
Network requestNetworkSPF policy analyser
Parse a pasted SPF policy, identify qualifiers and count direct DNS-using terms.
Local analysisNetworkDMARC policy analyser
Read a pasted DMARC record and review policy, alignment, reporting and percentage tags.
Local analysisNetworkDKIM public key inspector
Inspect a pasted DKIM key record, its key type, flags and public-key size.
Local analysis