# SecondDNS

> Reliable secondary DNS hosting with automatic AXFR zone transfers, DNS failover, and 99.9% uptime. Free 3-month trial, no credit card required. Plans from €0 to enterprise.

SecondDNS is an independent secondary DNS service that replicates your DNS zones from your primary nameserver using AXFR/IXFR zone transfers. When your primary DNS server becomes unavailable, secondary DNS servers continue to answer queries, ensuring your domain remains accessible.

## Main pages

- [Home](https://seconddns.com/): Secondary DNS hosting — automatic zone transfers, AXFR support, instant failover, 99.9% uptime
- [Pricing](https://seconddns.com/pricing): Plans for secondary DNS — Free (3-month trial), Starter, Pro, Max, Premium. Billed in EUR.
- [API Documentation](https://seconddns.com/docs/api): REST API reference for managing zones, nameservers, and subscriptions programmatically
- [About](https://seconddns.com/about): Mission, technology stack, and background of SecondDNS

## Guides

- [How to Set Up a Secondary DNS Server](https://seconddns.com/docs/guides/setup-secondary-dns): Step-by-step guide to adding a secondary nameserver — allow AXFR on the primary, sync the zone, update NS records
- [DNS Redundancy: Why It Matters and How to Achieve It](https://seconddns.com/docs/guides/dns-redundancy): Why DNS is a single point of failure and how to build redundancy with secondary nameservers
- [Understanding AXFR Zone Transfers](https://seconddns.com/docs/guides/axfr-zone-transfer): How AXFR and IXFR work, how to test a zone transfer with dig, TSIG security, and configuration examples
- [Personalized Nameservers: Setup, Glue Records, and Pitfalls](https://seconddns.com/docs/guides/personalized-ns-guide): How to use your own branded hostname (e.g. ns2.yourdomain.com) as a secondary DNS with glue records
- [How to Add Secondary DNS to cPanel/WHM](https://seconddns.com/docs/guides/cpanel-secondary-dns): Configuring SecondDNS as secondary for cPanel/WHM with BIND or PowerDNS
- [How to Add Secondary DNS to Plesk](https://seconddns.com/docs/guides/plesk-secondary-dns): Configuring SecondDNS as secondary for Plesk Obsidian with BIND zone transfer setup
- [How to Add Secondary DNS to DirectAdmin](https://seconddns.com/docs/guides/directadmin-secondary-dns): Configuring SecondDNS as secondary for DirectAdmin with BIND and PowerDNS zone transfer
- [How to Add Secondary DNS to CyberPanel](https://seconddns.com/docs/guides/cyberpanel-secondary-dns): Configuring SecondDNS as secondary for CyberPanel with PowerDNS zone transfer setup

## Key facts

- Secondary DNS servers hold read-only copies of DNS zone files obtained via AXFR zone transfers from the primary DNS server
- When the primary DNS server becomes unavailable, secondary servers continue answering queries
- SecondDNS supports AXFR and IXFR (incremental) zone transfers
- All standard DNS record types are supported: A, AAAA, CNAME, MX, TXT, NS, SRV, CAA, and more
- Free plan includes a 3-month trial with no credit card required
- REST API available for automated zone management
- Nameservers: ns2.seconddns.com, ns3.seconddns.com, ns4.seconddns.com