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dotdyntld
another broken dead link
you probably thought, some helpful text would show up here, right?
Well… this is all you've got.
that being said, the link in the box simply returns your IP which you can use in an A-record for your domain.
The A-record returns a 32-bit IPv4 address, most commonly used to map hostnames to an IP address of the host, but it is also used for DNSBLs, storing subnet masks in RFC 1101, etc..
http://api.opennicproject.org/ddns/web.dyn?user=SOMEuser&auth=kjngrkj
really does not much, if anything at all.