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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 1595 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.
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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 [683 Million Domains] $10,000 Details

Keyword: NUMBERTHEORY

Reverse Whois » KEYWORD [numbertheory ]  { 36 domain names }


NumDomain NameRegistrarCreatedUpdatedExpiry
1numbertheory.orgNetwork Solutions, LLC15 Feb 199922 Dec 202515 Feb 2027
2numbertheory.reviewAlpnames Limited22 Jul 2015-21 Jul 2016
3numbertheory.in-3 Dec 20154 Nov 20163 Dec 2017
4numbertheory.comGoDaddy.com, LLC14 Nov 200125 Oct 202514 Nov 2026
5numbertheory.netGoDaddy.com, LLC25 Mar 199927 Mar 202625 Mar 2027
6numbertheory.co.uk-8 Aug 20238 Aug 20238 Aug 2025
7numbertheory.directoryGoogle, Inc.10 Oct 201810 Oct 201810 Oct 2019
8numbertheory.infopair Networks, Inc. d/b/a pairNIC3 Feb 2021-3 Feb 2022
9numbertheory.inkGoDaddy.com, LLC8 Jul 202219 Aug 20238 Jul 2023
10numbertheory.ai-12 Nov 202517 Nov 202512 Nov 2027
11numbertheory.nlOne.com A/S20 May 20219 Dec 2025-
12numbertheory.sitePDR Ltd. d/b/a PublicDomainRegistry.com28 Jul 20233 Oct 202428 Jul 2024
13numbertheory.xyz-17 Apr 2026-17 Apr 2027
14numbertheory.lt-29 Jan 2021-30 Jan 2027
15numbertheory.workGoDaddy.com, LLC22 May 202416 Oct 202522 May 2026
16numbertheory.spaceNameCheap, Inc.2 Mar 20253 Mar 20262 Mar 2027
17numbertheorydownunder.orgTucows Domains Inc.13 Jul 201514 Mar 201613 Jul 2018
18numbertheoryguy.comWild West Domains, LLC30 Mar 201628 Feb 202630 Mar 2027
19numbertheoryrn.netSafeNames Ltd.20 May 20162 Jun 201720 May 2019
20numbertheoryresearchnetwork.netSafeNames Ltd.20 May 20162 Jun 201720 May 2019
21numbertheoryresearchnet.netSafeNames Ltd.20 May 20162 Jun 201720 May 2019
22numbertheoryrn.comSafeNames Ltd.20 May 20162 Jun 201720 May 2019
23numbertheoryresearchnetwork.comSafeNames Ltd.20 May 20162 Jun 201720 May 2019
24numbertheoryresearchnet.comSafeNames Ltd.20 May 20162 Jun 201720 May 2019
25numbertheoryplusone.comAutomattic Inc.17 Sep 201717 Sep 201717 Sep 2018
26numbertheoryandgrouptheory.comTucows Domains Inc.30 Aug 20193 Sep 202430 Aug 2025
27numbertheorybythenumbers.comGoDaddy.com, LLC19 Mar 202119 Mar 202119 Mar 2022
28numbertheoryacademy.comGoogle, Inc.24 Jun 20229 Jun 202524 Jun 2026
29numbertheoryonline.orgGoDaddy.com, LLC13 May 20243 Jul 202513 May 2026
30numbertheorygames.comGoDaddy.com, LLC11 Apr 201812 Apr 202511 Apr 2026
31numbertheoryfoundation.orgNameCheap, Inc.22 Oct 201922 Dec 201922 Oct 2029
32numbertheorygraph.latNameCheap, Inc.6 Jul 202316 Sep 20246 Jul 2024
33numbertheorygames.infoDynadot, LLC12 Jul 202412 Jul 202512 Jul 2026
34numbertheorylabs.comNameCheap, Inc.25 Apr 202525 Apr 202525 Apr 2035
35numbertheoryhk.comAlibaba Cloud Computing Ltd. d/b/a HiChina (www.ne…10 Aug 202418 Aug 202510 Aug 2026
36numbertheoryplayground.comGoDaddy.com, LLC21 Sep 202521 Sep 202521 Sep 2026

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=numbertheory

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

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