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SOA ·Record

marks the start of a zone of authority

value 6activeRFC 1035

Quick facts

TypeSOA
Value6
Statusactive
Meaningmarks the start of a zone of authority
SpecificationRFC 1035

Purpose

What does a SOA record do?

marks the start of a zone of authority

SOA is one of the DNS resource record (RR) types defined by RFC 1035.

Example

example.com. 3600 IN SOA ns1.example.com. admin.example.com. 2026081701 7200 3600 1209600 3600

Related record types

NS
an authoritative name server
A
a host address
AAAA
IP6 Address

Common uses

  • Start-of-authority metadata
  • Zone serial and refresh settings

Format

example.com. 3600 IN SOA ns1.example.com. admin.example.com. 2026081701 7200 3600 1209600 3600
FieldExplanation
MNAMEPrimary name server.
RNAMEAdministrator's mailbox.
SerialZone version for transfers.
Refresh / Retry / ExpireSecondary refresh timing.

Frequently asked questions

What does a SOA record do?

Start-of-authority metadata, Zone serial and refresh settings

Where do I add a SOA record?

In the DNS management panel of your registrar or DNS provider (for example Cloudflare or Route53).

Sources & standards

Updated 2026-08-18

Explore this reference

Related record types

NS
an authoritative name server
A
a host address
AAAA
IP6 Address

Related ports

53
DNS

DNS Records

DNS Records