Short answer: What is an IP address? It is a network address used to route traffic between devices, routers, servers, apps, and networks. Websites use an IP address so responses know where to go, but an IP address is not the same as a personal identity or exact home address.
For most users, the important distinction is between the public IP address that internet services can see and the private local IP addresses used inside a home, office, or device network. VPNs, mobile carriers, CGNAT, IPv6, and router settings can all affect which address appears in a test.
Quick answer
- An IP address is a routing label. It tells networks where traffic should be sent.
- Public and private IPs are different. Websites usually see your public IP, not the local address of your phone, laptop, or printer.
- IPv4 and IPv6 are address versions. IPv4 is shorter and older; IPv6 has a much larger address space.
- IP lookup is not exact identity. It can suggest provider, ASN, country, or region, but not reliably name a person or exact street address.
- One check is a snapshot. Results can change after switching Wi-Fi, mobile data, VPN servers, routers, or browser settings.
What is an IP address?
An IP address is an Internet Protocol address. It is part of the addressing system that lets devices and networks exchange packets. RFC 791 describes IPv4, and RFC 8200 describes IPv6.
Think of an IP address as a network routing identifier, not a name tag. A server needs an address to send data back to your connection. Your device, router, ISP, mobile carrier, workplace, VPN provider, or hosting company may all be involved in which address appears.
The phrase what is an IP address often gets simplified to "your internet address," but that can be misleading. A device can have several addresses at once: a local private IPv4 address, a public IPv4 address, one or more IPv6 addresses, and a VPN exit IP when a VPN is connected.
How IP addresses work in everyday browsing
When you open a website, your browser first resolves the domain name, then connects to an IP address. The server sends responses back through network routes. At home, the public IP usually belongs to your router or ISP connection, while phones, laptops, TVs, consoles, and printers use local addresses behind the router.
Routers often use Network Address Translation, or NAT, so multiple private devices can share one public IPv4 address. RFC 3022 describes traditional NAT behavior. This is why a website usually sees the router or VPN exit IP, not each device's private local address.
Mobile networks, apartment networks, and some ISPs may also use carrier-grade NAT. RFC 6598 defines shared address space often used in that context. CGNAT can affect gaming, self-hosting, cameras, and remote access because inbound connections may not reach your router directly.
Public, private, static, and dynamic IP addresses
| Type | What it means | Where you see it | What to remember |
|---|---|---|---|
| Public IP | Internet-facing address visible to websites and services | Router WAN, mobile carrier, VPN exit, server | Can indicate provider, ASN, and approximate location |
| Private IP | Local address used inside a home, office, or device network | 192.168.x.x, 10.x.x.x, 172.16-31.x.x | Defined for private IPv4 use in RFC 1918; not globally unique |
| Static IP | Address intended to stay stable over time | Business plans, servers, allowlists, remote access | Useful for predictability, but easier to correlate over time |
| Dynamic IP | Address that may change automatically | Most home, mobile, and consumer ISP connections | A changed IP does not erase accounts, cookies, or device signals |
| Shared or CGNAT IP | Public address or shared range used by many customers | Mobile carriers, some ISPs, VPN exits | Can complicate reputation, port forwarding, and troubleshooting |
For a deeper comparison, see Private vs Public IP Addresses, Static vs Dynamic IP Addresses, and How to Find Your Local IP Address.
IPv4 vs IPv6: two address versions
IPv4 addresses usually look like 203.0.113.7. IPv6 addresses look like 2001:db8::1 and use hexadecimal blocks that can be shortened. IPv6 exists because IPv4 address space is limited and the internet needed more globally routable addresses.
Many networks now use both. A laptop might have a private IPv4 address, a public or shared IPv4 path through the router, a link-local IPv6 address, a temporary IPv6 address, and a VPN exit IP at the same time. That is normal, but it can confuse IP, DNS, WebRTC, and geolocation checks.
For a dedicated comparison, read IPv4 vs IPv6. For allocation details, see How IP Addresses Are Assigned and the IANA IPv4 address space registry.
What an IP address can reveal
A public IP can often reveal the internet provider or network owner, ASN, rough country or region, and sometimes a nearby city. It can also show whether traffic appears to come from a VPN, data center, mobile network, hosting provider, school, company, or residential ISP.
That information can be useful for fraud checks, login security, content delivery, troubleshooting, abuse handling, and geolocation. It is also why IP addresses can be sensitive. A rare static IP or workplace network can be easier to correlate than a shared mobile or VPN exit address.
Still, IP geolocation is an estimate. It should not be treated as proof of an exact home address or physical seat. For more detail, read IP Geolocation Accuracy and Can Someone Track Me by My IP Address?.
What an IP address cannot prove by itself
- It cannot reveal your passwords.
- It cannot open your files.
- It cannot prove your exact home address from public lookup alone.
- It cannot prove which person used a shared device, home router, VPN exit, school network, or mobile carrier IP.
- It cannot remove the need to check cookies, logins, browser fingerprints, device identifiers, payment records, and provider logs.
An IP address is one signal. Stronger identification usually comes from combining IP logs with timestamps, account activity, browser signals, device information, billing records, or provider records.
Why an IP address matters for normal users
An IP address becomes practical when something looks wrong: a website shows the wrong city, an account flags a login, a game console cannot host a session, a VPN does not appear to change location, or a router device list shows an unfamiliar address. In those cases, the IP address helps narrow the problem, but it rarely answers the whole question by itself.
- Privacy checks: compare your public IP, DNS resolver, IPv6 route, and WebRTC candidates after changing VPN or browser settings.
- Account security: expect some platforms to react when the IP country, ASN, device, and login pattern change at the same time.
- Home troubleshooting: use local IP addresses to find printers, routers, cameras, consoles, TVs, and NAS devices on your own network.
- Remote access: check whether you have public IPv4, CGNAT, IPv6, a static address, or a dynamic address before exposing any service.
- Website support: provide your public IP, ASN, approximate location result, and timestamp when reporting false blocks or wrong region results.
Keep the scope clear. Checking your own IP address is normal troubleshooting. Scanning or probing networks you do not own or administer is different and should not be treated as ordinary IP lookup.
How to check your IP address safely
- Open What Is My IP to see the public IP visible from this browser session.
- Compare Wi-Fi and mobile data if you need to know whether the address changes by network.
- Use IP Geolocation Lookup and ASN Lookup to identify provider and location signals.
- Run DNS Leak Test, IPv6 Leak Test, and VPN Leak Test after changing VPN, DNS, browser, or router settings.
- Record results only for networks and devices you own or are authorized to troubleshoot.
If you use a VPN, websites usually see the VPN server's exit IP rather than your ISP-assigned public IP. That can reduce some network exposure, but it does not make you anonymous and does not remove account or browser tracking.
Common IP address mistakes
- Confusing public and private IPs:
192.168.1.20may identify a laptop inside your home, but it is reused on many networks and is not your public internet address. - Assuming a city lookup is exact: city-level geolocation can be stale, routed through another area, or influenced by mobile, VPN, proxy, and ISP architecture.
- Thinking dynamic IP equals privacy: a changing IP does not remove accounts, cookies, browser fingerprints, payment records, or device identifiers.
- Expecting a VPN to solve everything: a VPN changes the visible network route, but DNS, WebRTC, IPv6, accounts, and browser behavior still matter.
- Opening router admin or remote services directly: public IP reachability should be handled with strong authentication, firewalling, updates, and safer remote-access design.
IP address vs DNS, URL, and domain name
An IP address is not the same thing as a domain name or a full URL. A domain such as myipscan.net is a human-readable name. DNS helps translate that name to an address. A URL can include a protocol, domain, path, query string, and page location. The IP address is the network destination used to move packets.
This distinction matters for privacy. A public IP lookup may show the network path. DNS may show domain-level lookups. A URL path may reveal a specific page, but HTTPS usually protects that path from ordinary network observers. Browser cookies, accounts, and fingerprints can identify a session even when the visible IP changes.
When troubleshooting, avoid mixing these layers. If a website blocks your IP, check IP reputation, ASN, VPN, proxy, or carrier routing. If a domain fails to load, check DNS. If only one account behaves strangely, the cause may be account security, device recognition, or browser state rather than the IP address alone.
When your IP address matters most
- Login security: unusual IP, ASN, country, or device patterns may trigger account checks.
- VPN troubleshooting: IP, DNS, IPv6, and WebRTC results can show different network paths.
- Gaming and remote access: public IP, CGNAT, firewall rules, and router settings affect inbound connectivity.
- Email and server reputation: static IPs, shared IPs, blacklists, reverse DNS, and ASN reputation can affect deliverability.
- Privacy review: IP address signals combine with cookies, account logins, browser fingerprints, and device data.
What to do next
If your goal is basic awareness, check your public IP and compare it with your local IP. If your goal is privacy troubleshooting, check IP, DNS, IPv6, WebRTC, geolocation, and ASN signals together. If your goal is remote access or hosting, find out whether you have a public IP, CGNAT, static assignment, dynamic assignment, and sensible firewall controls.
The practical answer to what is an IP address is simple: it is a routing identifier. Treat it as useful and sensitive, but do not overread it as a complete identity, exact location, or security verdict.
Frequently asked questions
What is an IP address?
An IP address is a network address used to send traffic to and from a device, router, server, or network interface. It is a routing identifier, not a guaranteed personal identity.
Is my public IP the same as my local IP?
No. Your public IP is visible to internet services, while local private IP addresses are used inside a home, office, or device network. A router often translates between them.
Does an IP address show my exact home address?
Usually no. Public IP lookup can estimate a country, region, provider, ASN, or sometimes a nearby city, but it should not be treated as a public street-address lookup.
Can my IP address change?
Yes. Many home and mobile connections use dynamic public IPs that can change. Static IPs stay more consistent, while VPNs and proxies can show a different exit IP.
How do I check my IP address safely?
Use a browser-based IP check, compare Wi-Fi and mobile data if needed, and review DNS, IPv6, WebRTC, geolocation, and ASN results when troubleshooting privacy or routing.
Sources and methodology
MyIPScan tools and examples show observable browser and network signals. IP and geolocation results can be approximate, and VPN, DNS, WebRTC, IPv6, ASN, reputation, and browser checks are snapshots. A single result does not prove anonymity or every security condition. See the MyIPScan methodology and editorial policy.
This FAQ was updated using MyIPScan editorial guardrails: clear network explanations, no privacy guarantees, no exact-location overclaims, no unsafe remote-access advice, and careful distinction between public IPs, private IPs, IPv4, IPv6, NAT, CGNAT, and geolocation signals.