A fixed name for changing IP addresses
Your router or a script reports every new address, your name stays the same. Reach your home server, NAS or VPN on the go. Included in every domain.
Included in every domain, at no extra cost
.de: €3.99 in the first year
€19.00 per additional year
curl "https://dyndns.regfish.de/?fqdn=custom.example.com&ipv4=203.0.113.50&token=$DYNDNS_TOKEN"→ 100Zone yourname.com
Example- ; last reported
- home.yourname.com.300A203.0.113.7
What you need DynDNS for
Home server and NAS
Reach your photos, files and own services at home.yourname.com, even when your connection changes its address.
VPN on the go
Your VPN access always points to your router’s current address, without you looking it up.
Scripts and devices
Any device that can call a URL reports its own address: a router, a Raspberry Pi or a scheduled job.
How you run DynDNS with us
Turn it on
In the customer area you turn on DynDNS for your domain and get a personal token.
Zone yourname.com
Example- ; DynDNS on, token created
- homeA203.0.113.7
Set up the router
You enter the update URL, hostname and token in your router or script, for example a FRITZ!Box.
Zone yourname.com
Example- ; update URL: dyndns.regfish.de
- ; hostname: home.yourname.com
Report the address
When the address changes, the router calls the URL. We set the record anew; the answer 100 confirms it.
Zone yourname.com
Example- new: +homeA198.51.100.23
- ; answer 100: update applied
Scope of service
- Price
- Included in every domain, at no extra cost
- Addresses
- IPv4 and IPv6, separately or together; the caller’s address or a given one
- Updates
- By URL with a token, as GET or POST; for IPv6 also through dyndns6.regfish.de
- Answers
- 100 update applied, 101 no change needed, plus error codes for token, address and hostname
- Hostnames
- Existing records of the domain; new ones only if you allow it with forcehost=1
- TTL
- Default 300 seconds, adjustable per call
- Notification
- An email on every update, if you like
For developers
One call per address change
Prefer the DNS API? The same record also works as a call with an API key.
https://dyndns.regfish.de/fqdn·token·ipv4·ipv6·thisipv4=1·ttl100 · 101
curl -X POST https://api.regfish.com/dns/rr \ -H "x-api-key: $REGFISH_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "name": "custom.example.com.", "type": "A", "data": "203.0.113.50", "ttl": 60 }'Frequent questions
Does DynDNS cost extra?
No. DynDNS is included in every domain you keep with us.
Does it work with my router?
With any router that allows a custom update URL. There is a step-by-step guide for the FRITZ!Box.
Do I need a fixed IP address?
No, that is exactly what DynDNS is for: your router reports every new address and the name stays the same.
Does DynDNS cost extra?
No. DynDNS is included in every domain you keep with us.
Does it work with my router?
With any router that allows a custom update URL. There is a step-by-step guide for the FRITZ!Box.
Do I need a fixed IP address?
No, that is exactly what DynDNS is for: your router reports every new address and the name stays the same.
DynDNS comes with your domain
Search for your name. You turn on DynDNS as soon as the domain is with us.
Included in every domain, at no extra cost
.de: €3.99 in the first year
€19.00 per additional year