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Whois API / Whois History / Reverse Whois

Our Whois API returns consistent and well-structured WHOIS data in XML & JSON format. Returned data contain parsed WHOIS fields that can be easily understood by your application. Along with Whois API, we also provide API access to Whois History and Reverse Whois.

Powered by Amazon Web Services With support for 2026 TLDs, our cloud-based API lets you quickly access any domain's WHOIS data through Bulk Whois Lookup, Newly Registered Domains, Dropped Deleted Domains, Expiring Domains and Whois Database Download.
Our Services Price Order
1000 Whois Lookup API Queries $2 PayPal
500 Whois History API Queries $2 PayPal
200 Reverse Whois API Queries $2 PayPal
Newly Registered Domains Database $95 Details
Whois Database [222 Million Domains] $4695 Details

Reverse Whois

Simply enter a search term below to see the list of domain names owned by them.


Reverse Whois Demo

Reverse Whois API

Search our entire WHOIS database through the Reverse Whois API.

http://api.whoxy.com/?key=xxxxx&reverse=whois&identifier=value

Reverse Whois API lets you perform a comprehensive search on our database, to find domains owned by a company or person.
You just need to enter search terms such as the name, email or company, and you can find all the domains they ever owned.
If your search returns no results, you will NOT be charged any API queries. You are charged only on successful queries.

Sample Output: JSON SchemaXML SchemaJSON Live ResultsXML Live Results


Search Identifiers

You must send any one of following search identifiers to search the whois database.

Search by Domain Owner's Name:

http://api.whoxy.com/?key=xxxxx&reverse=whois&name=John+Smith

Search by Email Address:

http://api.whoxy.com/?key=xxxxx&reverse=whois&email=user@example.com

Search by Company / Organization Name:

http://api.whoxy.com/?key=xxxxx&reverse=whois&company=Acme+Corporation

Search by Keyword present at start of Domain Name:

http://api.whoxy.com/?key=xxxxx&reverse=whois&keyword=yahoo

Please note that search identifiers are case-sensitive. Owner Name identifier is "name". If you send "Name", it will be ignored.


Search Results Pagination

For faster data transfer, a maximum of 100 results are sent back per API call.
If your search returns more than 100 results, you can fetch remaining records through pages.

http://api.whoxy.com/?key=xxxxx&reverse=whois&identifier=value&page=2 http://api.whoxy.com/?key=xxxxx&reverse=whois&identifier=value&page=3 http://api.whoxy.com/?key=xxxxx&reverse=whois&identifier=value&page=4

Results 1 to 100 will be returned in Page #1, Results 101 to 200 in Page #2, Results 201 to 300 in Page #3, and so on…
Please note that you will be charged with single API credit each time you fetch a Result Page through Reverse Whois API.


Need more than 100 Results?

Fetch up to 1000 results per API call using the Mini Mode identifier:

http://api.whoxy.com/?key=xxxxx&reverse=whois&identifier=value&mode=mini

In mini mode, you will receive basic contact information like name, company and email.

Sample Output: Mini Mode (JSON)Mini Mode (XML)

Fetch up to 2500 results per API call using the Micro Mode identifier:

http://api.whoxy.com/?key=xxxxx&reverse=whois&identifier=value&mode=micro

In micro mode, you won't receive any contact information of the domain registrant.

Sample Output: Micro Mode (JSON)Micro Mode (XML)


Retrieving Data in XML Format

Simple add "&format=xml" to your API call and get results in XML Format.

http://api.whoxy.com/?key=xxxxx&reverse=whois&name=John+Smith&format=xml

Kindly use XML format only if your application strictly requires XML data. Compared to lightweight JSON format, XML carries a lot of extra baggage. This results in slower data transmission, and affects the overall performance of your application interacting with our API. We highly recommend you use JSON format whenever possible.


Account Balance Check

You can check your account's API query balance through:

http://api.whoxy.com/?key=xxxxx&account=balance

Sample Output: JSON SchemaXML SchemaJSON Live ResultsXML Live Results


API Status Codes

Every API call will return a Status of either: 0 (ERROR) or 1 (SUCCESS)
In case of Status 0, the reason behind failure of the API call will also be returned.

Sample Output: Invalid API Key (JSON)Invalid API Key (XML)


Pricing & Packages

Reverse Whois Pricing Total API Calls Price CPM Purchase
125 Reverse Whois API Queries 125 FREE $0 Signup Now
200 Reverse Whois API Queries 200 $2 $10.00 Order Now
2,000 Reverse Whois API Queries 2,000 $20 $10.00 Order Now
11,000 Reverse Whois API Queries 11,000 $100 $9.09 Order Now
25,000 Reverse Whois API Queries 25,000 $200 $8.00 Order Now
70,000 Reverse Whois API Queries 70,000 $500 $7.14 Order Now
200,000 Reverse Whois API Queries 200,000 $1000 $5.00 Order Now

Frequently Asked Questions

  1. API Key is available through: Account Manager » API Settings
  2. No, you will not be charged any API credits if your Reverse Whois query does not match any WHOIS records.
  3. Depending upon your search query, the results might contain multiple WHOIS records of the same domain name. However all the WHOIS records will be unique, and there will be no duplicate results. We save additional WHOIS record of a domain name only when there are any changes compared to the previous record. This is how we archive historical WHOIS records.
  4. As we do not save Raw Whois text in our database, this is not included with Reverse Whois results.
  5. Yes, this can be activated through: Account Manager » Account Settings
  6. Please signup now and receive FREE API Credits to test the Reverse Whois API.

If you have any questions, please contact us at Email Address

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