Products APIs Data Feeds Web Tools Domain Research & Monitoring Enterprise Packages AI Deep Research
WHOIS / WHOIS History
WHOIS / WHOIS History

Provide current and historical ownership information on domains / IPs. Identify all connections between domains, registrants, registrars, and DNS servers.

DNS / DNS History
DNS / DNS History

Look into all current and historical DNS / IP connections between domains and A, MX, NS, and other records. Monitor suspicious changes to DNS records.

IP Geolocation / IP Netblocks
IP Geolocation / IP Netblocks

Get detailed context on an IP address, including its user’s geolocation, time zone, connected domains, connection type, IP range, ASN, and other network ownership details.

Domain Research Suite (DRS)
Domain Research Suite (DRS)

Access our web-based solution to dig into and monitor all domain events of interest.

Domain Research Suite (DRS)
Domain Research Suite (DRS)

Get access to a web-based enterprise-grade solution to search and monitor domain registrations and ownership details for branded terms, fuzzy matches, registrants of interest, and more.

Research
Monitoring
White-Label
Predictive Threat Intelligence Feeds
Predictive Threat Intelligence Feeds

Predictive threat intelligence is your best first line of defense. Subscribe to the feeds to strengthen your cybersecurity posture. Contact us today for more information.

WhoisXML API Internet Infrastructure
Internet Infrastructure

Unlock integrated intelligence on Internet properties and their ownership, infrastructure, and other attributes.

Enterprise API Packages
Enterprise API Packages

Our complete set of domain, IP, and DNS intelligence available via API calls as an annual subscription with predictable pricing.

Security Intelligence (SI) Suite
Security Intelligence (SI) Suite

Offers complete access to WHOIS, IP, DNS, and subdomain data for product enrichment, threat hunting and more.

MCP Server
MCP Server

Talk to our APIs using LLMs. Connect your preferred LLM to WhoisXML API and simply chat about WHOIS, DNS, threat intelligence, and more.

Jake AI
Jake AI

I’m your Domain Intelligence Assistant. I make it easy to explore WHOIS, DNS, and threat data from WhoisXML API — I’m cloud-based, fast, and always ready to help.

Discover what you really pay for when buying commercial Internet intelligence data.

Download now
×
Contact Us
Specifications Pricing

Specifications

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 9.6+ 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.

Sample

How to download the datafeed files

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

File type File mask Avg. gzipped file size Avg. unpacked file size Avg. number of records
Daily diff sdp.*.daily.diff.csv.gz 116MB 328MB 4.4M
Weekly diff sdp.*.weekly.diff.csv.gz 833MB 2.3GB 32M
Weekly full sdp.*.weekly.full.csv.gz 201GB 622GB 11B
Monthly diff sdp.*.monthly.diff.csv.gz 4.5GB 13GB 166M

  • Daily Diff — Contains subdomains discovered within the last 24 hours.
  • Weekly Diff — Contains subdomains discovered within the last 7 days.
  • Weekly Full — Complete export of all known subdomains from the database.
  • Monthly Diff — Contains subdomains discovered within the last 30 days.

Output structure and fields' descriptions

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