DNS pillar hub
DNS & email guides
Authoritative guides on DNS records, MX/TXT/SPF/DKIM/DMARC, TTL propagation, and DIG queries — with links to the DNS Checker and DIG tool.
MX and TXT Records Explained — Check Online
Complete guide to MX and TXT DNS records: mail routing, SPF, DKIM, DMARC, verification tokens, and how to check them online with DN01.
How to Check DNS Records Online
Step-by-step guide to checking A, AAAA, MX, NS, TXT, CNAME, SOA, CAA, and SRV records online before nameserver or hosting changes.
DNS A Record Explained — IPv4 Lookup Guide
What DNS A and AAAA records do, how A record lookup tools work, CDN caveats, and verifying IPv4/IPv6 before go-live.
SPF, DKIM & DMARC DNS Guide — Email Auth
How SPF, DKIM, and DMARC TXT records work together, example strings, alignment basics, and verifying mail authentication with DNS Checker.
CNAME Record Explained — Aliases & Pitfalls
How DNS CNAME records alias one name to another, apex limitations, conflicts with other record types, and checking CNAME with DNS Checker.
DNS TTL & Propagation — How Long Changes Take
What DNS TTL means, realistic propagation timelines, lowering TTL before migrations, and verifying updates with DNS Checker vs propagation maps.
DIG Online — DNS Query Without Terminal
Use an online DIG tool for A, MX, NS, TXT, and other record types when terminal dig is unavailable. Compare with DNS Checker all-records view.
DIG NS Lookup — Find Authoritative Nameservers
How to check NS records with DIG, delegation glue, mismatched registrar NS, and fixing DNS after hosting moves.
DIG vs nslookup — Which DNS Tool to Use
Compare dig and nslookup for DNS troubleshooting, output sections, scripting, and when an online DIG tool is enough.