Piotr Kulpinski
Founder, HostingChecker.online
Founder of Hosting Checker and a web developer with over a decade of experience in DNS, hosting infrastructure, and domain management. Piotr builds tools that help developers and site owners understand their web stack.
Articles by Piotr Kulpinski
Best Hosting Checker Tools Compared (2026)
Seven hosting checker tools compared: what each lookup shows, which ones have an API, and what the API costs. Checked against each tool's site in October 2026.
How to Monitor Website Hosting Changes
Learn how to monitor website hosting changes for competitor intelligence, security, and M&A due diligence. Covers DNS monitoring and API-based tracking.
How to Find What CDN a Website Uses (5 Methods)
Learn how to find what CDN a website uses by checking HTTP headers, DNS records, and IP ranges. Identify Cloudflare, CloudFront, Fastly, and more.
How to Check If a Domain Uses Cloudflare (4 Methods)
Learn how to check if a website is using Cloudflare with DNS lookups, HTTP headers, IP range checks, and hosting checker tools. Detect Cloudflare in seconds.
How to Check Website Server Location (5 Methods)
Learn how to check website server location using IP lookup tools, command line, and DNS queries. See why it matters for speed, SEO, and compliance.
What Is My Website's IP Address? (How to Find It)
Learn how to find your website's IP address using online tools, command line, and DNS lookups. Covers IPv4 vs IPv6, shared vs dedicated IPs. Try it free.
How to Find Out Who Hosts a Website (5 Methods)
Learn how to find out who hosts a website using 5 proven methods — from instant hosting checker tools to WHOIS, DNS, and IP lookups. Try it free.
How to Check If a Website Has SSL (4 Easy Methods)
Learn how to check if a website has SSL with 4 easy methods — browser padlock, SSL checker tools, command line, and certificate transparency logs.
How to Check MX Records (And Why It Matters)
Learn how to check MX records for any domain using online tools and command line. Understand MX priority values and fix email delivery issues.
How to Find DNS Records for Any Domain
Learn how to find DNS records for any domain using online tools, command line, and hosting checkers. Covers A, AAAA, CNAME, MX, NS, and TXT record types.
SSL Certificate Types Explained: DV, OV, and EV Compared
SSL certificate types explained — learn the differences between DV, OV, and EV certificates, their validation, costs, and when to use each. Check yours free.
DNS Records Explained: The Complete Guide to Every Record Type
DNS records explained — learn what A, AAAA, MX, CNAME, TXT, NS, SOA, and SRV records do with real examples and configs. Find and fix DNS issues fast.
What Is DNS and How Does It Work?
What is DNS and how does it work? A beginner-friendly guide to the Domain Name System, DNS records, security, and privacy. Check any domain's records free.