Bulk DNS Checker

Paste up to 100 domains, hostnames, or URLs (one per line). This checker normalizes input and audits web DNS, MX routing health, SPF, DMARC, common DKIM selectors, HTTPS service binding and ECH posture, CAA certificate issuance policy, DNSSEC posture, authoritative AXFR zone-transfer exposure, and NS readiness in one run.