WhoisXML API Blog

Looking up a domain’s registration data should be simple. But in practice, many WHOIS lookup sites bury results under ads or return raw text that changes format from one registry to the next. Even when a lookup works, the registrant’s name and email are often redacted, leaving you with just a registrar and a few dates.

Those gaps slow down security teams triaging phishing domains, IT admins tracking expiration dates, and developers who need clean domain registration data for their apps. This guide covers the 10 best WHOIS lookup tools in 2026 with their key features, pros, cons, and pricing.

WhoisXML API analyzed 14.0M+ domains registered between 1 and 31 October 2026 that appeared in Newly Registered Domains to identify the most popular registrars, TLD extensions, and other global domain registration trends. This number rose by 13.7% from 12.3M+ NRDs last month.

We also determined the top TLD extensions used by 2.9M+ domains likely registered with malicious intent from the First Watch Malicious Domains Data Feed in October 2026. This number decreased by 8.6% from 3.2M+ in September.

Next, we studied the top TLD extensions of 1.3M+ confirmed malicious domains from the Threat Intelligence Data Feeds this month, which rose by 23.6% from 1.1M+ in September.

Finally, we summed up our findings and provided links to the threat reports produced using DNS and domain intelligence sources during the period.

Threat hunting often starts with a hunch: a workstation that keeps connecting to an unfamiliar server, or DNS queries to a newly registered lookalike domain. Hunters then turn this hunch into a hypothesis and test it against evidence in endpoint artifacts, event logs, packet captures, and attacker infrastructure.

Automated detection can’t catch every threat, so hunters need tools that let them ask specific questions of that evidence, and run newly published Sigma, YARA, or Suricata rules against logs, files, and captures collected before those rules existed.

EDR, SIEM, and XDR platforms are the hunter’s main tools, but one doesn’t simply deploy such a platform. They need organization-wide rollout and data before you can run a single query, and that takes procurement and many hours of engineering time. This article covers 20 tools that you can use almost right away on the input you already have, such as a suspicious domain, an EVTX file, a PCAP, a memory image, or a malware sample. Some are ready in minutes, others need some setup, but none requires an organization-wide security platform.

Screening disposable email signups? There are tools for that. 

But disposable email detection tools aren’t created equal. We ran an experiment comparing 14 of them, and we share the results here. Here’s a TL;DR version of the results in case you’re in a hurry.

We’ve released a new version of Website Categorization, with a major update to how websites are classified, how quickly results can be retrieved, and how categorization data can fit into advertising, brand-safety, web-filtering, and security workflows.

TL;DR

• Jake AI now has Bulk Analyzer to run WHOIS, DNS and IP lookups on whole lists.
• Two new tools extend it for security work: bulk website screenshot capture and domain brand impersonation detection.
• Jake AI has 25 WhoisXML API tools and runs independent lookups at the same time.

WhoisXML API analyzed 12.3+ million domains registered between 1 and 30 September 2026 that appeared in Newly Registered Domains to identify the most popular registrars, TLD extensions, and other global domain registration trends. This number rose by 5.9% from 11.6+ million NRDs last month.

We also determined the top TLD extensions used by 3.2+ million domains likely registered with malicious intent from the First Watch Malicious Domains Data Feed in September 2026. This number increased by 8.3% from the previous month.

Next, we studied the top TLD extensions of 1.07+ million confirmed malicious domains from the Threat Intelligence Data Feeds this month, which declined by 2.1% from 1.09+ million in August.

Finally, we summed up our findings and provided links to the threat reports produced using DNS and domain intelligence sources during the period.

TL;DR

• WhoisXML API’s VPN & Proxy Detection API is a new API with daily bulk data files that classifies IPv4 addresses as VPN, proxy, residential proxy, Tor, relay, hosting, or CDN traffic. 
• One of the things that sets the API apart is residential-proxy detection: we observe residential-proxy exits directly and attribute them to their network, while scan-based methods miss these exits because they have no proxy port to scan.
• The API is live now, with pricing starting as low as $1/month. Sign up to get an API key within minutes.