Every domain has a single point of failure.
Find yours before it finds you.
dnsspof resolves a domain's nameservers, mail, and web endpoints, maps every IP to its Autonomous System, and shows where the redundancy quietly collapses onto one network, one provider, or one country.
DNS
Nameserver count, ASN / provider / prefix / country diversity, anycast detection, DNSSEC.
Web
Origin count, CDN presence, single-IP and single-ASN exposure.
Mail
MX provider and network concentration across exchangers.
Network · BGP/ASN
The decisive test: do DNS and origin share one ASN, so a single outage takes name resolution down with the site — and leaves no way to fail over?