Associated Domain Finder Examples

GEThttps://api.deepinfo.com/v1/discovery/associated-domain-finder

Worked examples for the Associated Domain Finder: the domains that share something with a given domain: its registrant’s e-mail, organization or phone, its name servers, IP address or mail servers, or the organization in its SSL certificate. First the default (every association type), then one example per association value, two types together, strict, include_subdomains, paging and ordering. The domains are public organizations’ domains: paypal.com, wikipedia.org, apple.com, cloudflare.com and cloudflare.co.at.

Every example is a real request with the response the API returned on September 24, 2026 (Deepinfo DEMO account); totals such as result_count change as the dataset is updated.

Responses are trimmed for display: results shows the first 3 records (11 on the two Default Associations pages, so that the whole list of the eleven requested types shows; lists inside a record are cut to 2 items and texts to 600 characters there), long lists inside a record the first 10 items and very long texts the first 4,000 characters, while result_count stays the full total; each page says what was shortened. Personal data (WHOIS contact names, addresses, phone numbers and personal e-mail addresses) is redacted, and cookie values are masked (<value>).

Unless an example shows paging, it asks for page_size=25. page is 1 to 400 and page_size 25 to 100 (the API default is 100).

Each result is a full domain record, the same shape as a Domain Detail response: WHOIS, DNS, SSL certificate and web data.

Every response also names the types it was asked for (requested_association_parameters) and the types it actually used (applied_association_parameters): not every type is applied to every domain.

After the examples: Association Types · Ordering Values · Parameters Without an Example

Default Associations

ExampleParamValue
Domains Associated With a Domaindomainpaypal.com
Every Association Must Match (Strict)strict
domain		true
paypal.com

One Association Type

ExampleParamValue
Same Registrant E-mailassociation
domain		whois_registrant_email
cloudflare.co.at
Same Registrant E-mail Domainassociation
domain		whois_registrant_email_apex_normalized
cloudflare.co.at
Same Registrant Organizationassociation
domain		whois_registrant_organization
paypal.com
Same Normalized Registrant Organizationassociation
domain		whois_registrant_organization_normalized
paypal.com
Same Registrant Phoneassociation
domain		whois_registrant_phone
cloudflare.co.at
Same Normalized Registrant Phoneassociation
ordering
domain		whois_registrant_phone_normalized
punycode
cloudflare.co.at
Same Name Servers in WHOISassociation
domain		whois_ns
wikipedia.org
Same IP Address (DNS A)association
domain		dns_a
apple.com
Same Name Servers in DNSassociation
domain		dns_ns
paypal.com
Same Mail Servers (DNS MX)association
domain		dns_mx
cloudflare.com
Same Organization in the Certificateassociation
domain		ssl_subject_organization
paypal.com

Several Association Types

ExampleParamValue
Two Association Typesassociation
domain		dns_ns,dns_mx
paypal.com
Two Association Types, Both Must Matchassociation
strict
domain		whois_registrant_organization,ssl_subject_organization
true
paypal.com

Options

ExampleParamValue
Including Subdomainsinclude_subdomains
ordering
association
domain		true
-punycode
dns_ns
paypal.com

Paging

ExampleParamValue
Second Page of Resultspage
association
domain		2
dns_ns
paypal.com
Larger Pages (100 Results)page_size
association
domain		100
dns_ns
paypal.com

Ordering

ExampleParamValue
Most Recent WHOIS Change Firstordering
association
domain		-domain.whois_last_change_date
dns_ns
paypal.com

Association Types

association takes one type or several, separated by commas; without it, the API asks for all eleven. Each value below was accepted and echoed by the live API on September 24, 2026 (other values are answered with HTTP 400, "Invalid values involved").

Value Finds Domains With the Same
whois_registrant_email Registrant e-mail address
whois_registrant_email_apex_normalized Registrant e-mail domain (domain.whois_normalized.registrant.email_domain_apex)
whois_registrant_organization Registrant organization, as written
whois_registrant_organization_normalized Registrant organization, normalized (paypalinc for paypal inc.)
whois_registrant_phone Registrant phone number, as written
whois_registrant_phone_normalized Registrant phone number, normalized
whois_ns Name servers in the WHOIS record
dns_a IP address (DNS A record)
dns_ns Name servers in DNS (NS record)
dns_mx Mail servers (DNS MX record)
ssl_subject_organization Organization in the SSL certificate’s subject

Ordering Values

ordering sorts the results by one field, ascending; a leading - sorts descending (-domain.whois.create_date puts the newest registration first). Each value below was tried on the live API on September 24, 2026, on one of the Discovery endpoints, and sorted the results as described. Without ordering, the order is not fixed: the same request can return its records in a different order.

Value Sorts By
punycode The domain name, in its ASCII (punycode) form
domain.extension.punycode The extension (TLD)
dns_last_change_date The last change seen in the DNS records
ssl_last_change_date The last change seen in the SSL certificate
domain.whois_last_change_date The last change seen in the WHOIS record
domain.whois.create_date The registration date
domain.whois.expiry_date The expiry date
domain.whois.update_date The date the registry last updated the WHOIS record

Parameters Without an Example

As of September 24, 2026, these parameters have no worked example.

Parameter Why
export export=true returns the whole result set as a file download (JSON or CSV) instead of a page of results; these examples show paged JSON only.
export_format Used only with export=true: json (the default) or csv.
export_scope Used only with export=true: basic, default or extended (how many fields each exported record carries).

Reference updated