I can't remember what it was called but there was a way for your router to announce to an online service what its IP address was, so that you only had to remember a name assigned to you by the online service rather than the dynamic IP address that your ISP assigned to you.

What is this feature called?

  • +1 for both jer.salamon and thepurplepixel both answers were what I was looking for. Best answer to thepurplepixel for answering first. – John Jul 23 '10 at 4:04

This is called Dynamic DNS, or DDNS. Some popular DDNS providers are DynDNS and No-IP. Many router firmwares like DD-WRT have DDNS support built in.


dyndns.com most routers support updating it with your dynamic router info and you can set up a hostname with them for free.


This is called "Dynamic DNS" .. an agent on the router (or on a PC behind the router) will update the Dynamic DNS service on a regular basis.

Some consumer routers have dynamic DNS agents built into them. Or, many consumer routers can have the built-in software replaced with an open-source broadband router OS such as DD-WRT or Tomato.

Justin Scott, a regular on Server Fault, runs DtDNS, a dynamic DNS hosting service.

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