What Is Reverse DNS and When Do You Need It? TL;DR A reverse DNS lookup maps an IP address back to a hostname, the opposite of a standard forward DNS query. It relies on PTR records stored in the in-addr.arpa (IPv4) or ip6.arpa (IPv6) namespace. Missing or misconfigured reverse DNS is a leading cause of … Read more
DNS Records Explained: A, AAAA, MX, CNAME, TXT, NS TL;DR — Key Takeaways DNS records are instructions stored on authoritative nameservers that tell the internet how to route traffic, deliver email, and verify domain ownership. The A record is the most fundamental DNS record type — it maps a domain name to an IPv4 address … Read more
What Is a MAC Address? How to Find and Look Up Yours TL;DR — Key Takeaways A MAC address is a unique 48-bit hardware identifier assigned to every network interface card (NIC) — it’s how devices identify each other on a local network. MAC addresses operate at Layer 2 (data link) and look like A4:83:E7:2F:5B:10 … Read more
How to Find Your Public IP Address (And Why It Matters) TL;DR — Key Takeaways Your public IP address is the address the rest of the internet sees when your devices connect — it’s assigned by your ISP, not by you. The fastest way to find your IP address is to use a web-based IP … Read more