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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 offer WHOIS History API and Reverse WHOIS API.

Powered by Amazon Web Services With support for 1594 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 Details
1000 WHOIS History API Queries $5 Details
1000 Reverse WHOIS API Queries $10 Details
Newly Registered Domains Database $495 Details
Whois Database [646 Million Domains] $10,000 Details

Keyword: QTHEORY

Reverse Whois » KEYWORD [qtheory ]  { 18 domain names }


NumDomain NameRegistrarCreatedUpdatedExpiry
1qtheory.org-26 Oct 202526 Oct 202526 Oct 2026
2qtheory.comGoDaddy.com, LLC22 Oct 20031 Sep 202322 Oct 2025
3qtheory.netTucows Domains Inc.9 Apr 201820 Jun 20239 Apr 2023
4qtheory.org.uk-9 Apr 201810 Mar 20229 Apr 2024
5qtheory.co.uk-9 Apr 201810 Mar 20229 Apr 2024
6qtheory.uk-9 Apr 201810 Mar 20249 Apr 2026
7qtheory.onlineGoDaddy.com, LLC24 Sep 202025 Sep 202524 Sep 2026
8qtheory.infoGoDaddy.com, LLC24 Sep 202024 Sep 202524 Sep 2026
9qtheory.bizGoDaddy.com, LLC24 Sep 20206 Oct 202524 Sep 2025
10qtheorybrs.comCrazy Domains FZ-LLC18 Jul 201429 Jul 201718 Jul 2017
11qtheoryauctions.comEnameco, LLC29 May 20099 May 202529 May 2026
12qtheorypoliticalresearchers.comPDR Ltd. d/b/a PublicDomainRegistry.com7 Oct 20208 Oct 20247 Oct 2025
13qtheorymusic.comGoDaddy.com, LLC25 Jun 20196 Sep 202525 Jun 2025
14qtheorybusinessresearchers.comBigRock Solutions Ltd.30 Jul 201930 Jul 201930 Jul 2020
15qtheorycorp.comGoDaddy.com, LLC13 Dec 20217 Oct 202213 Dec 2026
16qtheoryhmtraderx.com1API GmbH7 Jan 20228 Jan 20257 Jan 2026
17qtheoryiah.topChengdu West Dimension Digital Technology Co., Ltd…6 May 202319 Jun 20246 May 2024
18qtheoryresearchers.comRealtime Register B.V.6 Aug 202420 Aug 20256 Aug 2025

Reverse Whois Demo

Reverse Whois API

You can fetch the above results using our Reverse Whois API.

https://api.whoxy.com/?key=xxxxx&reverse=whois&keyword=qtheory

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

Reverse Whois Pricing Total API Calls Price CPM Purchase
200 Reverse Whois API Queries 200 $2 $10.00 Order Now
1,000 Reverse Whois API Queries 1,000 $10 $10.00 Order Now
10,000 Reverse Whois API Queries 10,000 $100 $10.00 Order Now
50,000 Reverse Whois API Queries 50,000 $400 $8.00 Order Now
250,000 Reverse Whois API Queries 250,000 $1,500 $6.00 Order Now
1 Million Reverse Whois API Queries 1,000,000 $4,000 $4.00 Order Now
5 Million Reverse Whois API Queries 5,000,000 $10,000 $2.00 Order Now