This service offers a REST API allowing to perform DNS queries over HTTP from multiple locations worldwide.

It can be used to verify and troubleshoot DNS propagation, geo-aware DNS servers, and Anycast DNS deployments.

We currently have 24 available nodes in 9 countries, and are constantly adding more. If you are an Internet Service Provider or a Telecom Operator willing to give us access to your DNS resolvers, please contact us. Thank you.

For updates, follow Frederic on Twitter

The API powering this site (RRDA) is open source and can be downloaded here or on GitHub

Making queries

See the section below for a list of available nodes to query.

For more information on how to use the service, please refer to the documentation.

Getting Resources Records

URL Scheme: /node/domain/querytype

Getting Reverse PTR Records (for both IPv4 and IPv6 addresses)

URL Scheme: /node/x/ip

Available Nodes

We provide a list of all available nodes in JSON format: nodes.json

NodeLocationDNS Server OperatorAS Number
at01atAustriaFreeDNS AS8218
at02atAustriaFreeDNS AS8218
ch01chSwitzerlandStatDNS AS61098
cn01cnChinaCNNIC AS24151
cn02cnChinaCNNIC AS24151
cz01czCzech RepublicCZ.NIC Labs AS25192
cz02czCzech RepublicCZ.NIC Labs AS25192
de01deGermanyDigitalcourage AS6724
de02deGermanyDNS.WATCH AS31400
de03deGermanyDNS.WATCH AS31400
dk01dkDenmarkCensurfriDNS AS9167
dk02dkDenmarkCensurfriDNS AS198794
ru01ruRussiaYandex AS13238
ru02ruRussiaYandex AS13238
us01usUnited StatesDNS-OARC AS6939
us02usUnited StatesDNS-OARC AS6939
us03usUnited StatesISC AS1280

Available Nodes (Anycast)

Our server is located in Geneva, so queries sent to these anycast nodes will reach instances located in Switzerland or nearby.

Here are traceroute results for the following servers: cloudflare, google1, google2, he, opendns1, opendns2, quad9

NodeInstanceDNS Server OperatorAS Number
cloudflarenlSwitzerlandCloudflare AS13335
google1nlSwitzerlandGoogle AS15169
google2nlSwitzerlandGoogle AS15169
henlSwitzerlandHurricane Electric AS6939
opendns1nlFranceOpenDNS AS36692
opendns2nlFranceOpenDNS AS36692
quad9nlFranceQuad9 AS19281

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