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Hosting, DNS & web infrastructure
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 With dig, cron and an API
Monitor website hosting changes with a short shell script: record a domain's DNS records, IP network and detected providers on a cron schedule, and get a diff when anything changes. Uses dig, curl and the Hosting Checker API.
How to Find What CDN a Website Uses (5 Methods)
Find what CDN a website uses from its HTTP headers, CNAME records and IP owner. Real output for Cloudflare, CloudFront, Fastly and Akamai sites, plus a header and DNS reference for 10 CDNs.
How to Check If a Domain Uses Cloudflare (4 Methods)
Check if a domain uses Cloudflare in under a minute: look for ns.cloudflare.com nameservers, the cf-ray header or a Cloudflare IP address. Real dig and curl output, plus the setups each check misses.
Website Server Location: How to Find Where a Server Is Located
Find a website's server location: the country, city and data center where its server is located. Use an IP lookup, dig and ipinfo, response headers, traceroute or WHOIS, and learn why anycast and CDNs change the answer.
Website IP Lookup: How to Find Your Website's IP Address
What is my website's IP address? Run a website IP lookup online, or use ping, dig or nslookup. Real output for example.com, IPv4 vs IPv6, shared vs dedicated IPs, and what changes when a CDN sits in front.
Where Is This Website Hosted? How to Find Out (5 Methods)
How to find where a website is hosted: a hosting checker, DNS, IP and ASN lookups, WHOIS/RDAP and response headers. Includes three worked examples with real output for a Cloudflare, a Vercel and a Hostinger site.
SSL Certificate Checker: How to Check If a Website Has SSL
Check an SSL certificate four ways: a free SSL certificate checker, the browser address bar, openssl and curl, and Certificate Transparency logs. Includes real command output and what each certificate error means.
MX Record Check: How to Find a Domain's Mail Servers
Run an MX record check with a DNS lookup tool, dig or nslookup. See the current MX values for Google Workspace, Microsoft 365, Zoho, Proton and Fastmail, what a null MX means, and how to fix common email delivery problems.
How to Check DNS Records for Any Domain (Online and Command Line)
Check DNS records for any domain with an online DNS record lookup, dig, nslookup, PowerShell or DNS over HTTPS. Real output for every command, plus how to query a specific resolver or the authoritative nameserver.
SSL Certificate Types Explained: DV, OV and EV Compared
SSL certificate types explained: what the CA checks for DV, OV and EV certificates, how to tell them apart with real certificates from wikipedia.org, paypal.com and bankofamerica.com, and when each type makes sense.
DNS Records Explained: Every Record Type With Real Examples
DNS records explained: what A, AAAA, CNAME, MX, TXT, NS, SOA, SRV, PTR, CAA and HTTPS/SVCB records do, with real dig output from live domains and the fields of each record.