Intro
Every device on the internet — your phone, the router in your living room, the server behind this site — has an address. When you load a page, your device sends packets addressed to the server’s address, and the server answers yours. Without these numbers, the internet simply could not route anything anywhere.
This guide explains what IP addresses are, how IPv4 and IPv6 differ, and what your own IP address can and cannot reveal about you. You can check yours right now with the free IP checker, which shows your public addresses, ISP, and location.
What an IP address is
An IP address (Internet Protocol address) is a numeric label assigned to every device on a network. It works like a postal address: data is split into packets, each packet carries the destination address, and routers pass it along hop by hop until it arrives.
Two versions of the protocol are in use today: IPv4, the original, and IPv6, its successor. Both do the same job — identifying devices so data can be routed — but they use different address formats and vastly different amounts of space.
IPv4: the original, running out of room
IPv4 addresses are 32-bit numbers, usually written as four decimal octets: 192.168.1.10, 8.8.8.8, 172.217.16.14. With 32 bits there are exactly 4,294,967,296 possible addresses — which seemed inexhaustible in 1981 and is nowhere near enough today.
The internet ran out of new IPv4 addresses years ago. The stopgap that kept things working is NAT (network address translation): a whole household shares one public IPv4 address, and the router translates between private addresses inside the home and the single public one outside.
- 32-bit address space — about 4.3 billion addresses, now exhausted at the allocation level.
- Dotted-decimal format — 203.0.113.7, grouped into four 8-bit numbers.
- Private ranges — 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 are used inside networks and never routed on the public internet.
IPv6: the long-term fix
IPv6 uses 128-bit addresses written as eight groups of hexadecimal digits: 2001:0db8:85a3:0000:0000:8a2e:0370:7334. The space is so large that every device on Earth could have billions of addresses — no NAT required.
Adoption is well underway: most operating systems, phones, and major networks support IPv6, and many sites are reachable over both versions (called dual-stack). For most people it is invisible — your device picks whichever works — but for site owners, serving over IPv6 means adding AAAA records alongside the classic A records.
Tip: Use the DNS lookup tool to check both record types: A for IPv4 and AAAA for IPv6. If a domain has no AAAA record, it is IPv4-only.
Public vs private addresses
Public IP addresses are globally unique and routable across the internet — the address of a web server or your home router’s external side. Private addresses live only inside local networks and are recycled across millions of homes and offices.
This split is why your devices have two addresses: a private one like 192.168.1.23 assigned by your router, and the public one your router uses to reach the internet. The IP checker shows your public address as seen from the outside — the one websites actually see.
What your IP address reveals (and what it doesn’t)
An IP address is not a home address. Geolocation databases can usually pin it to a city or region, and your ISP is visible — but not your street, your name, or your exact building. Dynamic IPs change over time, which further blurs the trail.
That said, it is still a persistent identifier: sites use it for rate limiting, fraud checks, and analytics, and it is the address that shows up in server logs. If privacy matters, a VPN or proxy hides your real address by presenting the VPN server’s instead.
Which version should you care about?
For everyday browsing, neither — devices negotiate automatically. For anyone running a website, the practical checklist is short: make sure your domain has both A and AAAA records if your host supports IPv6, and confirm your site loads over IPv6 as well as IPv4, since more users reach it that way every year.
You can verify both sides in one place: the IP checker shows your current public IPv4 and IPv6, and the DNS lookup shows what records a domain publishes.
Practical takeaway
An IP address identifies a network endpoint for routing; it is not a complete identity, location, or security policy. Distinguish public, private, temporary, and shared addresses, and let DNS and application authentication solve their own problems. Use an IP check for the address visible to your browser, not as a claim about every address behind your connection.
FAQ
What does IP stand for?
Internet Protocol. An IP address is the numeric address assigned to each device on a network so data can be routed to it.
Is an IP address the same as a website address?
No. A domain like example.com is for humans; DNS translates it into the IP address where the site actually lives. The DNS lookup tool shows that mapping.
Can someone find my exact location from my IP?
Not exactly. IP geolocation usually resolves to a city or region and shows your ISP — not your street or building. Dynamic IPs also change over time.
What is the difference between IPv4 and IPv6?
IPv4 uses 32-bit addresses like 192.168.1.1 and has run out of space; IPv6 uses 128-bit hexadecimal addresses and has effectively unlimited room. Both route data; IPv6 is the successor.
How do I find my IP address?
Open the IP checker tool — it shows your public IPv4 and IPv6 addresses, your ISP, and your approximate location as seen from the internet.