Specifications | Subdomains Database | WhoisXML API


This data feed subscription is licensed to you or your organization only, you may not resell or relicense the data without explicit written permission from Whois API, Inc. Any violation will be prosecuted to the fullest extent of the law.

The data feed provides a downloadable subdomains database in the format of rows with information of each of the 2.3+ billion records. To get access to the Database files from the paths, you need to provide valid credentials. Username and password are equal to your personal API Key which you can obtain from the My Products page.


Downloading via HTTPS

Downloading via FTP

Downloading via FTPS

Read more about the FTPS connection: https://en.wikipedia.org/wiki/FTPS.

Our FTP server supports explicit FTP over TLS encryption. You may configure your FTP client to use explicit FTP over TLS encryption for secure communications.

Our FTPS server is accessed using the same paths and API keys as a regular FTP server, the instructions for which are described above. To connect via FTPS, select the "Require explicit FTP over TLS" encryption option in your FTP client, if it supports it. FileZilla configuration example:

explicit FTP over TLS encryption

Average file sizes

files gzip unpacked records
Daily diff 15.3MB 44.6MB 901K
Weekly full 37.4GB 157.6GB 2.6B
Weekly diff 95MB 270MB 5.5M
Monthly diff 445MB 1.2GB 25.8M

Output structure and fields' descriptions

  • Structure: <domain>,<firstSeen>,<lastSeen>
  • Example: 104-55-77-110.lightspeed.mssnks.sbcglobal.net,1548418836,1592145871
Domain name.
Timestamp of the first time that the record was seen.
Timestamp of the last update for this record.