1dot1dot1dot1 is a fast and secure DNS resolver powered by Cloudflare that focuses on privacy and speed.
Why this server?
Queries Cloudflare's 1.1.1.1 DNS-over-HTTPS service to resolve mail-related DNS records (MX) when validating email addresses, so domain deliverability can be checked without sending any mail.
Why this server?
Provides DNS lookup capabilities using 1.1.1.1 as a configurable DNS server option for domain resolution queries
Why this server?
Uses the 1.1.1.1 public DNS resolver as the default service for performing DNS lookups and tracing delegation chains with DNSSEC validation.
Why this server?
Enables DNS queries via Cloudflare's 1.1.1.1 resolver, supporting DNS-over-HTTPS, DNS-over-TLS, and DNS-over-QUIC.
Why this server?
Provides a DNS propagation check by querying Cloudflare's 1.1.1.1 public DNS resolver, showing what DNS records are currently visible for a domain.
Why this server?
Queries Cloudflare's 1.1.1.1 as a default validating resolver for DNS and DNSSEC checks; also used as a smoke-test target.
Why this server?
Provides DNS lookups (A, AAAA, MX, TXT, NS, CNAME, SOA) via Cloudflare 1.1.1.1 DNS-over-HTTPS, returning records with TTLs, response status, and DNSSEC validation.
Why this server?
Uses Cloudflare's public DNS resolver (1.1.1.1) as a pinned resolver for real MX record lookups, confirming that an email domain can plausibly route mail as part of the verify_email tool's deliverability checks.
Why this server?
Provides DNS resolution services as part of passive reconnaissance, querying multiple public resolvers including 1.1.1.1 to enumerate DNS records.