Netspace India

    SOA Record Lookup

    View the Start of Authority record — primary nameserver, serial, timing values.

    What is a SOA record?

    Every DNS zone has exactly one SOA record (Start of Authority). It identifies the primary authoritative nameserver, the responsible email contact, and timing parameters (serial number, refresh, retry, expire, minimum TTL) that control how secondary nameservers sync with the primary.

    The serial number is the most-watched field — every time the zone is edited, the serial increments. If you've just made a DNS change, checking the serial tells you whether your changes have been picked up by secondary nameservers. For high-availability DNS with properly-tuned SOA defaults, Netspace India's DNS hosting handles all this for you.

    Common uses

    • Verify DNS zone changes have propagated to secondary nameservers
    • Check the primary nameserver for a domain
    • Debug DNS replication delays
    • Confirm the responsible email contact for a zone

    Frequently Asked Questions

    What is an SOA record?
    SOA (Start of Authority) is a mandatory DNS record that identifies the primary nameserver for a zone, the responsible admin email, and the serial number plus timing values for zone replication.
    What is the SOA serial number?
    A number that increments every time the zone is modified. Secondary nameservers compare the serial against their own copy and pull the latest zone data when the primary's serial is higher.
    What does the 'Minimum TTL' in SOA mean?
    Originally the default TTL for records in the zone. Modern DNS also uses it as the TTL for negative responses (NXDOMAIN caching duration).
    Can I have multiple SOA records?
    No — a zone has exactly one SOA record. It's a strict DNS rule.
    What timing values should I use?
    Typical defaults: Refresh 10800 (3h), Retry 3600 (1h), Expire 604800 (7d), Minimum TTL 86400 (24h). Netspace India DNS sets reasonable defaults automatically — no manual tuning needed.
    Why would I need to look up an SOA?
    Most commonly: to see which nameserver is primary, verify a zone change by watching the serial increment, or debug DNS synchronization issues.
    Related Netspace Service

    Managed DNS Hosting — Sensible Defaults, No Tweaking

    Netspace India's DNS hosting ships with properly-tuned SOA defaults, DNSSEC support, and full web control panel.

    View DNS Hosting →

    Other DNS Lookup Tools

    A Record Lookup

    IPv4 address for a domain

    AAAA Record Lookup

    IPv6 address for a domain

    MX Record Lookup

    Mail servers that accept email

    TXT Record Lookup

    SPF, DKIM, DMARC, verification

    CNAME Lookup

    Canonical name aliases

    NS Lookup

    Nameservers for a domain

    Reverse DNS (PTR)

    IP address → hostname

    DNS Propagation Check

    Check 6 global resolvers at once

    Need a domain, hosting or DNS management?

    Netspace India offers domain registration, Cloudflare-powered DNS, and 24×7 support — trusted by businesses since 2005.

    Search Domains →View Hosting Plans