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📚 DNS Record Types Reference
DNS has more record types than anyone remembers. You know A and MX, maybe SPF and DKIM if you set up email. But what about SRV, CAA, DNSKEY, TLSA? This reference covers every type you might run into, with one-line summaries and concrete example values.
Examples
A (IPv4) · AAAA (IPv6) · MX (mail) · TXT (verification, SPF, DKIM) · CNAME (alias) · NS (nameserver)CAA (which CAs can issue certs) · SRV (service location) · PTR (reverse DNS) · DNSKEY (DNSSEC)Frequently asked questions
Difference between A and CNAME?
A points a domain to an IP directly. CNAME points a domain to another domain (which then resolves). CNAME cannot coexist with other records on the same name, and cannot be set on the apex.
What is CAA and should I set it?
CAA tells the world which CAs (Let's Encrypt, DigiCert, etc.) can issue SSL certs for your domain. Prevents random CAs from issuing certs in your name. Yes, set it.
About this calculator
DNS Record Types Reference runs entirely in your browser using standard formulas. No data is sent to any server. We don't share your inputs with lenders, brokers, or anyone else — there's no funnel and no follow-up email.
Related tools
- 🔍 DNS Lookup — Look up DNS records (A, AAAA, MX, TXT, NS, CNAME) for any domain.
- ↩️ Reverse DNS Lookup — Find the hostname registered for any IP address (PTR record).
- 🔌 TCP / UDP Port Reference — Searchable reference of common TCP/UDP ports and the services that use them.
Why this tool
vs typical free network-tools sites
| NetToolset | Typical free site | |
|---|---|---|
| Price | Free | Free |
| Signup required | No | Often (for advanced features) |
| Ads inside the tool | No | Yes (banner + interstitial) |
| Logs your IP / queries | No | Yes (often resold) |
| Data sent to a server | Math runs in browser; lookups hit Cloudflare DoH directly | Yes (all goes through their server) |
| Open source | Yes | No |
| Bookmarkable URL per tool | Yes | Mixed |
| Multilingual | EN / ES / PT / FR / DE | Usually EN only |
| Loads in under 1s | Yes (static) | Often slow (ad tracking) |