This data call returns the recursive chain of DNS forward (A/AAAA/CNAME) and reverse (PTR) records starting form either a hostname or an IP address.

https://stat.ripe.net/data/dns-chain/data.<format>?<parameters> 

e.g. https://stat.ripe.net/data/bgp-start/data.json?resource=www.ripe.net

Parameters

Key	Value	Info	Required
resource	Hostname or IP address (Ipv4 or IPv6)	Defines the resource that the query is performed for.	YES

Output

Data

Key	Info
forward_nodes	A key-value list in which the key is a hostname and the value is the list of IP addresses/hostnames to which it has A/AAAA/CNAME records pointing to.
reverse_nodes	A key-value list in which the key is an IP address and the value is the list of hostnames to which it has PTR records pointing to.
nameservers	The list of IP addresses of the DNS resolvers used to do perform the DNS queries.
authoritative_nameservers	The list of the authoritative nameservers for the returned DNS records.
query_time	Defines the time of the query.
resource	Defines the resource used in the query.

Example

    "data": {
        "authoritative_nameservers": [
            "pri.authdns.ripe.net.", 
            "ns3.nic.fr.", 
            "sns-pb.isc.org.", 
            "sec3.apnic.net.", 
            "sec1.apnic.net.", 
            "tinnie.arin.net."
        ], 
        "forward_nodes": {
            "www.ipv6.ripe.net": [
                "2001:67c:2e8:22::c100:68b"
            ], 
            "www.ripe.net": [
                "193.0.6.139", 
                "2001:67c:2e8:22::c100:68b"
            ]
        }, 
        "nameservers": [
            "193.0.19.101", 
            "193.0.19.102", 
            "193.0.19.6"
        ], 
        "query_time": "2013-02-19T12:09:00", 
        "resource": "www.ripe.net", 
        "reverse_nodes": {
            "193.0.6.139": [
                "www.ripe.net"
            ], 
            "2001:67c:2e8:22::c100:68b": [
                "www.ipv6.ripe.net"
            ]
        }
    }