About

The Developer

My name is Ivan B. I hold a degree in Electrical Engineering and have been writing software since 2010 more than a decade of building web applications, backend services and automation tools. Over that time I have completed more than 10 projects across different industries, ranging from small business utilities to network diagnostics platforms.

I have passed the relevant professional state examination in my field. I work as an employee while building and maintaining independent projects in my spare time. IPWhois.net is one of those a free, ad-light tool I built because I wanted a fast, no-nonsense way to look up network information without being pushed toward a paid plan on the first click.

Career Timeline

1988

Born in Croatia

Grew up with an interest in electronics and early computing.

2007 - 2012

Electrical Engineering University

Completed undergraduate studies in Electrical Engineering. Specialised in control systems and digital communications.

2010

First Software Projects

Started writing commercial software alongside university studies. First projects were web-based business tools for local clients.

2013

Professional State Examination

Passed the state professional examination required for licensed engineering practice in Croatia.

2014 - Present

Employment & Freelance

Employed as an engineer while continuing independent software development. Accumulated over 10 completed projects across web applications, automation and network tooling.

2024 - Present

IPWhois.net

Built and launched IPWhois.net as a personal project. A free, fast set of network information tools. Grew to 40+ tools, 1.5M+ lookups, a community blacklist database and a wiki. Continues to expand.

Qualifications

Electrical Engineering Degree

University-level, Croatia

Professional State Examination

Licensed engineering practice, Republic of Croatia

EU Professional Qualifications

Recognised across EU member states

About IPWhois.net

40+

Tools

1.5M+

IP Lookups

150K+

Blacklisted IPs

100%

Free

Hosted in EU

IPWhois.net started as a personal tool and grew into a public service. The goal is simple: give anyone fast, accurate network information without requiring sign-up, without dark patterns, and without hiding the useful results behind a paywall.

The site covers IP lookup and geolocation, domain and ASN WHOIS, DNS propagation, MAC address vendor lookup, SSL inspection, port checking, blacklist checking, VPN and DNS leak testing, and more. All tools use cached results where appropriate to keep response times low and reduce load on upstream data sources.

We also run our own threat intelligence database at bl.ipwhois.net with over 150,000 reported malicious IP addresses, refreshed daily from multiple sources. The blacklist is integrated into our Blacklist Checker and available via a free public API.

Data comes from the five Regional Internet Registries and public DNS infrastructure. The site is self-hosted on dedicated infrastructure in Europe (Hetzner, Germany) with Cloudflare CDN.

Why Trust This Site

• Built by a professional developer.
• No registration required for any tool. You get full results without giving up your email.
• No data selling. We don't sell your IP lookups, search queries or browsing data to third parties.
• Own databases. We maintain our own IP geolocation, VPN detection, ISP speed and MAC vendor databases compiled from authoritative public sources. Nothing is fabricated.
• Self-hosted in the EU. The server runs on dedicated hardware in Germany , not a shared cloud instance. We control the full stack.
• Actively maintained. New tools, bug fixes and data updates happen regularly. This isn't an abandoned project.
• Community features. Registered users can comment, report abuse, edit wiki articles and save favorites. All contributions go through moderation.
• Own threat intelligence. We run bl.ipwhois.net, our blacklist database with 150K+ IPs from honeypots and user reports, refreshed daily.

Contact

Questions, bug reports or collaboration enquiries can be sent via the contact page or directly to [email protected].