Blog & How To Guides | WhoisXML API

WhoisXML API Blog

5 Powerful Use Cases of Domain Research and Monitoring Tools

In today’s business landscape, it is almost impossible to be successful without setting up an online presence. What’s more, if you are launching a company or product, thinking about which domain name to use is a priority. In fact, it cannot be randomly picked as you must deeply connect with your target audience. But the domain registration market is highly dynamic, and it is advisable to secure domains of interest before someone else does. How can you do that?

Continue reading

Approaching Security Awareness the Smart Way with Threat Intelligence

While digitalization has brought many benefits like faster and easier communication, there are also disadvantages that businesses must be ready to face as a side effect — most notably, cybersecurity threats. Whois API Inc. CEO founder Jonathan Zhang has recently appeared as a guest expert on The Security Awareness Company’s website discussing that tension and the synergies existing between threat intelligence and security awareness. Some of the main points covered are summarized below.

Continue reading

Domain Histories Reveal Bad Actors

The European Union’s General Data Protection Regulation (GDPR) places the responsibility for data privacy on organizations and their Boards of Directors. In the event of a data breach, GDPR may fine organizations up to $24 million or 4 percent of its global revenues in the previous year. It’s important to note, however, that GDPR doesn’t only affect Europe-based companies.

Continue reading

Tracking Domains for Cyber Self-Defense

In 2008, hackers hijacked, which provided online bill payment services and redirected traffic to a website in Ukraine. The fake CheckFree website downloaded malware on CheckFree customers' computers. The malware stole usernames and passwords. Even worse, it infected the computers of customers of minor banks that had partnered with CheckFree. The banks’ websites had been directing their users to CheckFree.

Neither CheckFree nor the banks had been monitoring changes in the WHOIS registries of their websites. If they had, they would have seen the redirection hackers had placed in domain records.

Continue reading

Make Your Business Work Better With the Right Domain Name

Nothing enhances your website or app like the ability to offer intrinsic value to your customers or visitors. However your business connects to the domain niche, the ability to integrate domain availability into your offering gives you industry authority and the type of branding that can make you stand out from the competition.

Whether you’re hoping to make your next big profit in cryptocurrency (, parenting (, vaping (, or Three’s Company memorabilia (, having the best technology available for domain availability checks is an absolute must in your toolkit.

Continue reading

7 Slightly Unexpected Use Cases of Bulk WHOIS

The Internet has created plenty of opportunities to launch websites and run ventures, yet achieving transparency and accountability online is more complicated than ever in today’s digital landscape. Pretty much anyone anywhere in the world can buy any domain name — leading to situations where identities get blurred and giving scammers plenty of opportunities to plan and execute multiple types of cyber attacks.

Fortunately, publicly available information such as WHOIS records includes details of domain owners and registration activities to help businesses and entrepreneurs find out who is actually on the other end of the web.

Continue reading

Discover Which IP Range a Suspicious IP Belongs to by Using IP Netblocks WHOIS Data Feed – and Keep Your Network Safe

In order to keep your site and network secure from malicious attacks, spam, fraud and hackers, it’s important to identify and then promptly block any suspicious IPs before they can make any real and lasting damage on your network. Cyber attackers, however, are very skilled at masking their IPs (not to mention that they are extremely persistent and do not give up easily) and finding out where they come from can be difficult – but far from impossible.

That is why we created this handy tool which will help you discover which IP range a particular IP belongs to.

Continue reading

How To Map IP Ranges To Their Organization?

For cybersecurity analyst to discover any impending threats, the starting point is usually by checking the attacker's infrastructure. Whois records provides the essential base for most investigations. But attackers can easily stay hidden with domain Whois protection services thereby preventing the analyst from accessing the much-needed Registrant information. In such a scenario analyst can circumvent their research by finding the IP address of the attacker. IP data can offer analysts with various touch points of these bad actors. Understanding the importance of IP data for threat intelligence, WhoisXmlApi has already been providing various IP products and services like domain IP database, IP Geolocation, Reverse IP, covering 99.5% IP addresses in use now. Taking that a step further, we are now excited about our latest endeavor in the IP space with IP Netblocks Whois Datafeeds! This database will equip you with all the information with regards to all the currently registered IP blocks (ranges) with details of the ISP or hosting provider that uses that block for its customers.

Continue reading
Try our WhoisXML API for free
Get started
Have questions?

We are here to listen. For a quick response, please select your request type or check our Contact us page for more information. By submitting a request, you agree to our Terms of Service and Privacy Policy.

Or shoot us an email to