Check out our sister site NsJson! DNS Lookup and reverse IP API in JSON.


In essence, WHOIS JSON API is a specially-designed model that collects data points related to domain ownership and registration from an extensive WHOIS database. Whois API, a hosted web service, returns parsed fields to your application in JSON and XML formats based on the HTTP requests. That said, you are relieved of the worries relating to query limits and registrations that domain registrars fix.

Whois API service offers details on WHOIS record data, domain name, IP address, etc. And all this information is parsed and presented in a way your business can easily consume.

Origin Whois servers in real time

WhoisJson API usually pulls records from origin Whois servers in real time, so you get up-to-the minute results. We cache some records for performance, but you can bypass the cache as needed.

Well-defined Fields

Cleans up the records and pulls them apart into well-defined fields. Our system normalizes character sets and line endings, pulls the various fields from the raw text, and puts the fields in a consistent, automation-friendly format (XML or JSON).

Avoids query rate limits

Avoids query rate limits that you would encounter when doing Whois queries from your own IP address. Our system uses caching and a large pool of diverse IP addresses to minimize blockages and ensure that you get the records you need.

Low prices

Our competitors have extremely high prices. We are a small structure so we have lower costs. The satisfaction of our customers is also one of our priorities.

Practical usage : Cybercrime prevention

  • Helps cybersecurity professionals in tackling and controlling cyber crimes.
  • Anti-malware solutions use these API to detect malicious websites, spam, etc.
  • Brand agents use WHOIS APIs to protect their intellectual property and search for any copycats or duplicates of their brands.
  • Legal agencies use these APIs to check any websites, domains, or IP addresses of criminals or fraudulent entities.
  • Website owners use WHOIS APIs to identify new business partnerships with the help of contact details in the WHOIS records.
  • Payment processing agencies and banks use these tools to detect any transactional frauds.

Why choose us?

Well, WHOIS JSON API comes with numerous benefits. Let’s check out some of these.

  • Captures all the data points, including email, registrant name, domain availability, registration address, creation date, expiration date, etc.
  • The information from WHOIS APIs is parsed and well-presented to make it convenient for businesses to use.
  • WHOIS API data is real-time, ensuring that only the most updated and accurate information is made available.
  • Query results from both raw text and parsed fields and appears in the most common JSON or XML format.
  • Easy to integrate APIs, compatible with most major programming languages.

Much more than a simple API

Domain Information

Use WHOIS lookup to check domain name availability and to discover the contact information of a domain owner.

Reverse Whois

This API displays as much information as possible for a given IP address, sourced from our private database.


NsLookup queries the specified DNS server and retrieves the requested records that are associated with the domain name you provided.

250 random whois

This special endpoint give your 250 random whois from registered domain.