Domain Registrar Finder API

With Domain Registrar Finder API get WHOIS information for multiple domains or IP addresses, with support for all TLDs and JSON, raw and line formats. Ideal for bulk analysis.

About the API: 

The Domain Registrar Finder API provides a powerful solution for querying WHOIS information for single or multiple domains or IP addresses.
It allows you to query a single domain, process multiple domains efficiently, or resolve an IP address to its corresponding domain. The API supports various response formats, such as JSON (for easy integration into applications), inline format (ideal for fast text processing), and raw (for retrieving data in its original form). Since its launch in 2016, it has become an essential tool for analysts, cybersecurity firms, and users, enabling automation in large-scale domain verification and auditing. Its ability to handle batch queries and high availability makes it a reliable choice for domain monitoring and data analysis projects.

API Documentation

Endpoints


Send a GET request to the endpoint with optional parameters such as domains, ip, format, or domain to obtain WHOIS data in different formats.



                                                                            
GET https://zylalabs.com/api/5361/domain+registrar+finder+api/6939/bulk+whois+lookup
                                                                            
                                                                        

Bulk WHOIS Lookup - Endpoint Features

Object Description
domains [Required] Coma separated domain names
ip [Optional] IP address. Will get resolved to domain.
format [Optional] json: rich, structured json, raw: raw data, split: formatted lines
domain [Optional] Domain name
Test Endpoint

API EXAMPLE RESPONSE

       
                                                                                                        
                                                                                                                                                                                                                            {"example.org":[{"0":"Domain Name: example.org\r"},{"1":"Registry Domain ID: 13a1800564ae4cf589c9f5723a630958-LROR\r"},{"2":"Registrar WHOIS Server: \r"},{"3":"Registrar URL: \r"},{"4":"Updated Date: 2024-10-14T04:00:40Z\r"},{"5":"Creation Date: 1995-08-31T04:00:00Z\r"},{"6":"Registry Expiry Date: 2025-08-30T04:00:00Z\r"},{"7":"Registrar: ICANN\r"},{"8":"Registrar IANA ID: 376\r"},{"9":"Registrar Abuse Contact Email: \r"},{"10":"Registrar Abuse Contact Phone: \r"},{"11":"Domain Status: serverDeleteProhibited https://icann.org/epp#serverDeleteProhibited\r"},{"12":"Domain Status: serverRenewProhibited https://icann.org/epp#serverRenewProhibited\r"},{"13":"Domain Status: serverTransferProhibited https://icann.org/epp#serverTransferProhibited\r"},{"14":"Domain Status: serverUpdateProhibited https://icann.org/epp#serverUpdateProhibited\r"},{"15":"Registry Registrant ID: REDACTED FOR PRIVACY\r"},{"16":"Registrant Name: REDACTED FOR PRIVACY\r"},{"17":"Registrant Organization: ICANN\r"},{"18":"Registrant Street: REDACTED FOR PRIVACY\r"},{"19":"Registrant City: REDACTED FOR PRIVACY\r"},{"20":"Registrant State/Province: CA\r"},{"21":"Registrant Postal Code: REDACTED FOR PRIVACY\r"},{"22":"Registrant Country: US\r"},{"23":"Registrant Phone: REDACTED FOR PRIVACY\r"},{"24":"Registrant Phone Ext: REDACTED FOR PRIVACY\r"},{"25":"Registrant Fax: REDACTED FOR PRIVACY\r"},{"26":"Registrant Fax Ext: REDACTED FOR PRIVACY\r"},{"27":"Registrant Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.\r"},{"28":"Registry Admin ID: REDACTED FOR PRIVACY\r"},{"29":"Admin Name: REDACTED FOR PRIVACY\r"},{"30":"Admin Organization: REDACTED FOR PRIVACY\r"},{"31":"Admin Street: REDACTED FOR PRIVACY\r"},{"32":"Admin City: REDACTED FOR PRIVACY\r"},{"33":"Admin State/Province: REDACTED FOR PRIVACY\r"},{"34":"Admin Postal Code: REDACTED FOR PRIVACY\r"},{"35":"Admin Country: REDACTED FOR PRIVACY\r"},{"36":"Admin Phone: REDACTED FOR PRIVACY\r"},{"37":"Admin Phone Ext: REDACTED FOR PRIVACY\r"},{"38":"Admin Fax: REDACTED FOR PRIVACY\r"},{"39":"Admin Fax Ext: REDACTED FOR PRIVACY\r"},{"40":"Admin Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.\r"},{"41":"Registry Tech ID: REDACTED FOR PRIVACY\r"},{"42":"Tech Name: REDACTED FOR PRIVACY\r"},{"43":"Tech Organization: REDACTED FOR PRIVACY\r"},{"44":"Tech Street: REDACTED FOR PRIVACY\r"},{"45":"Tech City: REDACTED FOR PRIVACY\r"},{"46":"Tech State/Province: REDACTED FOR PRIVACY\r"},{"47":"Tech Postal Code: REDACTED FOR PRIVACY\r"},{"48":"Tech Country: REDACTED FOR PRIVACY\r"},{"49":"Tech Phone: REDACTED FOR PRIVACY\r"},{"50":"Tech Phone Ext: REDACTED FOR PRIVACY\r"},{"51":"Tech Fax: REDACTED FOR PRIVACY\r"},{"52":"Tech Fax Ext: REDACTED FOR PRIVACY\r"},{"53":"Tech Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.\r"},{"54":"Name Server: a.iana-servers.net\r"},{"55":"Name Server: b.iana-servers.net\r"},{"56":"DNSSEC: signedDelegation\r"},{"57":"URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/\r"},{"58":">>> Last update of WHOIS database: 2024-11-01T14:20:15Z <<<\r"},{"59":"\r"},{"60":"For more information on Whois status codes, please visit https://icann.org/epp\r"},{"61":"\r"},{"62":"Terms of Use: Access to Public Interest Registry WHOIS information is provided to assist persons in determining the contents of a domain name registration record in the Public Interest Registry registry database. The data in this record is provided by Public Interest Registry for informational purposes only, and Public Interest Registry does not guarantee its accuracy. This service is intended only for query-based access. You agree that you will use this data only for lawful purposes and that, under no circumstances will you use this data to (a) allow, enable, or otherwise support the transmission by e-mail, telephone, or facsimile of mass unsolicited, commercial advertising or solicitations to entities other than the data recipient's own existing customers; or (b) enable high volume, automated, electronic processes that send queries or data to the systems of Registry Operator, a Registrar, or Identity Digital except as reasonably necessary to register domain names or modify existing registrations. All rights reserved. Public Interest Registry reserves the right to modify these terms at any time. By submitting this query, you agree to abide by this policy.  The Registrar of Record identified in this output may have an RDDS service that can be queried for additional information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.\r"},{"63":""}],"foo.com":[{"0":"   Domain Name: FOO.COM\r"},{"1":"   Registry Domain ID: 413464_DOMAIN_COM-VRSN\r"},{"2":"   Registrar WHOIS Server: whois.tucows.com\r"},{"3":"   Registrar URL: http://www.tucows.com\r"},{"4":"   Updated Date: 2024-06-04T15:35:58Z\r"},{"5":"   Creation Date: 1997-08-13T04:00:00Z\r"},{"6":"   Registry Expiry Date: 2025-08-12T04:00:00Z\r"},{"7":"   Registrar: Tucows Domains Inc.\r"},{"8":"   Registrar IANA ID: 69\r"},{"9":"   Registrar Abuse Contact Email: [email protected]\r"},{"10":"   Registrar Abuse Contact Phone: +1.4165350123\r"},{"11":"   Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited\r"},{"12":"   Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited\r"},{"13":"   Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited\r"},{"14":"   Name Server: NS1.DIGIMEDIA.COM\r"},{"15":"   Name Server: NS2.DIGIMEDIA.COM\r"},{"16":"   DNSSEC: unsigned\r"},{"17":"   URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/\r"},{"18":">>> Last update of whois database: 2024-11-01T14:20:00Z <<<\r"},{"19":"\r"},{"20":"For more information on Whois status codes, please visit https://icann.org/epp\r"},{"21":"\r"},{"22":"NOTICE: The expiration date displayed in this record is the date the\r"},{"23":"registrar's sponsorship of the domain name registration in the registry is\r"},{"24":"currently set to expire. This date does not necessarily reflect the expiration\r"},{"25":"date of the domain name registrant's agreement with the sponsoring\r"},{"26":"registrar.  Users may consult the sponsoring registrar's Whois database to\r"},{"27":"view the registrar's reported date of expiration for this registration.\r"},{"28":"\r"},{"29":"TERMS OF USE: You are not authorized to access or query our Whois\r"},{"30":"database through the use of electronic processes that are high-volume and\r"},{"31":"automated except as reasonably necessary to register domain names or\r"},{"32":"modify existing registrations; the Data in VeriSign Global Registry\r"},{"33":"Services' (\"VeriSign\") Whois database is provided by VeriSign for\r"},{"34":"information purposes only, and to assist persons in obtaining information\r"},{"35":"about or related to a domain name registration record. VeriSign does not\r"},{"36":"guarantee its accuracy. By submitting a Whois query, you agree to abide\r"},{"37":"by the following terms of use: You agree that you may use this Data only\r"},{"38":"for lawful purposes and that under no circumstances will you use this Data\r"},{"39":"to: (1) allow, enable, or otherwise support the transmission of mass\r"},{"40":"unsolicited, commercial advertising or solicitations via e-mail, telephone,\r"},{"41":"or facsimile; or (2) enable high volume, automated, electronic processes\r"},{"42":"that apply to VeriSign (or its computer systems). The compilation,\r"},{"43":"repackaging, dissemination or other use of this Data is expressly\r"},{"44":"prohibited without the prior written consent of VeriSign. You agree not to\r"},{"45":"use electronic processes that are automated and high-volume to access or\r"},{"46":"query the Whois database except as reasonably necessary to register\r"},{"47":"domain names or modify existing registrations. VeriSign reserves the right\r"},{"48":"to restrict your access to the Whois database in its sole discretion to ensure\r"},{"49":"operational stability.  VeriSign may restrict or terminate your access to the\r"},{"50":"Whois database for failure to abide by these terms of use. VeriSign\r"},{"51":"reserves the right to modify these terms at any time.\r"},{"52":"\r"},{"53":"The Registry database contains ONLY .COM, .NET, .EDU domains and\r"},{"54":"Registrars.\r"},{"55":""}],"google.com":[{"0":"   Domain Name: GOOGLE.COM\r"},{"1":"   Registry Domain ID: 2138514_DOMAIN_COM-VRSN\r"},{"2":"   Registrar WHOIS Server: whois.markmonitor.com\r"},{"3":"   Registrar URL: http://www.markmonitor.com\r"},{"4":"   Updated Date: 2019-09-09T15:39:04Z\r"},{"5":"   Creation Date: 1997-09-15T04:00:00Z\r"},{"6":"   Registry Expiry Date: 2028-09-14T04:00:00Z\r"},{"7":"   Registrar: MarkMonitor Inc.\r"},{"8":"   Registrar IANA ID: 292\r"},{"9":"   Registrar Abuse Contact Email: [email protected]\r"},{"10":"   Registrar Abuse Contact Phone: +1.2086851750\r"},{"11":"   Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited\r"},{"12":"   Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited\r"},{"13":"   Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited\r"},{"14":"   Domain Status: serverDeleteProhibited https://icann.org/epp#serverDeleteProhibited\r"},{"15":"   Domain Status: serverTransferProhibited https://icann.org/epp#serverTransferProhibited\r"},{"16":"   Domain Status: serverUpdateProhibited https://icann.org/epp#serverUpdateProhibited\r"},{"17":"   Name Server: NS1.GOOGLE.COM\r"},{"18":"   ...
                                                                                                                                                                                                                    
                                                                                                    

Bulk WHOIS Lookup - CODE SNIPPETS


curl --location --request GET 'https://zylalabs.com/api/5361/domain+registrar+finder+api/6939/bulk+whois+lookup?domains=foo.com,example.org,google.com' --header 'Authorization: Bearer YOUR_API_KEY' 

    

API Access Key & Authentication

After signing up, every developer is assigned a personal API access key, a unique combination of letters and digits provided to access to our API endpoint. To authenticate with the Domain Registrar Finder API REST API, simply include your bearer token in the Authorization header.
Headers
Header Description
Authorization [Required] Should be Bearer access_key. See "Your API Access Key" above when you are subscribed.

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Submit a GET with the desired domain or IP; receive WHOIS details in seconds.

The API allows you to query domain and IP WHOIS data at scale, in multiple formats.

Receives domains or IPs and returns detailed WHOIS data in JSON, raw, or line formats.

Verification and massive analysis of domains. IP address and domain auditing for cybersecurity. Domain registration data collection for market analysis.

Basic Plan: 800 requests per day. Pro Plan: 800 requests per day. Pro Plus Plan: 800 requests per day. Premium Plan: 1600 requests per day. Elite Plan: No limitations

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The API uses API keys for authentication. To access the API, include your API key in the request header. The API key is provided upon registration and should be kept secure.

The API returns detailed information about the age and history of a domain, including years, months and days since its creation, as well as expiration and update dates.

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 Service Level
33%
 Response Time
133ms

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