Newly Observed Hostnames (NOH)
NOH focuses on the first time a hostname is observed in the DNS and can help uncover malicious activity at the subdomain level.
Format
{
"timestamp": "2022-02-14T18:25:43.511Z",
"hostname": "login-paypal.ddns.net"
}
Rate
The current rate is around 8,000,000 newly observed hostnames per day.
Pricing
€999/month — talk to us at contact@dns0.eu to set up the subscription and get your API key.
Threat intelligence partners get free or discounted access to this data feed.
Authentication
Authenticate by passing your API key as Bearer token in the Authorization header.
The WebSocket streaming endpoint is available without authentication for testing purposes (up to 10 minutes per day).
Stream
Download
Newline-delimited JSON dumps of the previous day’s stream are made available daily at the following URL.
https://data.dns0.eu/noh
The file is updated every day between midnight and 1am UTC. Use conditional
requests (If-Modified-Since) or make use of HEAD requests to avoid
unnecessary bandwidth usage.