Practical usage

Cybersecurity

Cyber Security researchers use Reverse WHOIS API for investigating & curbing cybercrime. Cyber Security and anti-malware solutions use Reverse WHOIS API to detect spam, malicious websites, intrusions, and other online misbehaviors.

Brand Protection

Brand agents use Reverse WHOIS data to protect their intellectual property and check potential trademark infringements through searches to scope domain name similarities, duplicates, or copycats.

Marketing research

Website owners and managers use Reverse WHOIS API to identify new business and partnership opportunities and to locate potential buyers through the contact details provided in the WHOIS database.

Law Enforcement

Law enforcement agencies use Reverse WHOIS API to identify all of the connected domains, websites and IP addresses associated with fraudulent activities and criminals.

Cyber Fraud Detection

Payment processors and banks use Reverse WHOIS API to detect transaction fraud. Website owners and managers use Reverse WHOIS API to identify new business and partnership opportunities and to locate potential buyers through the contact details provided in the WHOIS database.

Simple query parameters documentation

Output
For a given name, email address, phone number, etc.:

• number of records matching
• domain 1 (corresponding with the search terms used)
• domain 2 (corresponding with the search terms used)
• domain 3 (corresponding with the search terms used)
• Etc.

Parameters of the advanced query

All the parameters of the simple query (described under “Parameters of the simple query”) are accepted, except for the basicSearchTerms block. You have to provide a block of advancedSearchTerms similarly to the following example:

"advancedSearchTerms": [{
            "field": "RegistrantContact.Organization",
            "term": "Airbnb, Inc."
        },
        {
            "field": "RegistrantContact.Country",
            "term": "UNITED STATES"
        }]

How to use
Check our Reverse Whois API docs for more information. You can find code examples in various programming languages on GitHub.

Benefits

• Find all domain names having an association with a certain individual or organization
• The intelligence behind the API covers most active domains across thousands of TLDs for your specified terms
• Search terms may be an exact or fuzzy match
• Filtering possible by date of registration or expiration
• Easily integrable and RESTful API, compatible with all major programming languages
• The query results are returned in XML & JSON with parsed fields and raw texts

Use cases

• Identify all the domain names worldwide which share search terms anywhere in their WHOIS records
• Use any detail contained in WHOIS records to build attack profiles and curb cybercrime
• Find out which domains are owned by a competitor or company of interest