SecNow!

Open DNS (ODNS) API

News

2025-05-01: Released API version 1.0.

Open DNS API

The ODNS API provides access to our latest DNS scan results.

We scan the complete IPv4 address space once a week for open DNS recursive resolvers, forwarders, and transparent forwarders.

Try the API now and get insights into the threat landscape posed by the open DNS infrastructure.

If you use our data, please, cite our work: 10.1145/3485983.3494872

View API Documentation
Explore Measurements
Example API Request
curl -X 'POST' \
  'https://odns-data.netd.cs.tu-dresden.de/api/v1/ODNSQuery/GetDnsEntries' \
  -H 'accept: text/plain' \
  -H 'Content-Type: application/json' \
  -d '{
  "pagination": {
    "page": 1,
    "per_page": 10
  },
  "filter": {
    "protocol": "udp",
    "queried_ip_country": "USA"
  },
  "sort": {
    "field": "timestamp_request",
    "order": "desc"
  }
}'
Contact And Credit

In case of questions, please, contact Maynard Koch.

We highly appreciate the contribution of Patrick Balian, who implemented the API to make our research easily accessible to anyone!

BIG thanks!

  • Maynard Koch PhD Student and Research Associate at TU Dresden, Chair of Distributed and Networked Systems.

  • Patrick Balian Master Student at TU Dresden

    Implementation of the API using .NET, PostgreSQL and Python.