What is my IP location, ISP and ASN?

The IP checker above answers more than "what is my ISP". It lists your public IP address, hostname, ISP, organization and ASN, country, region and city, timezone and local time. All of it comes from registration and geolocation databases matched to your address. The country is usually right. The city is an estimate.

• The IP address is the public address your browser used to reach CheckIP. Most connections show an IPv4 address, such as 203.0.113.45.
• The hostname is the reverse DNS name your ISP set for that address. Many ISPs don't set one, so it just repeats the IP.
• The ISP or provider is the company that holds the address block. Read what an ISP is to see how providers hand out addresses.
• The ASN (autonomous system number) identifies the network that routes your traffic on the internet. A VNPT connection in Vietnam, for example, shows AS45899. One ISP can run several ASNs.
• Country, region, city, timezone and local time come from geolocation databases, which map blocks of addresses to places.

When a VPN is on, every field describes the VPN server's network, not yours.

Public vs private IP address: why ipconfig shows a different number

A public IP is assigned by your ISP and is seen by every website you visit. A private IP is assigned by your router to each device inside your home network and never leaves it. That's why a what's my IP page shows one number while your computer's network settings show another, usually starting with 192.168.

Private addresses come from three ranges reserved in RFC 1918:

• 10.0.0.0 to 10.255.255.255 (10.0.0.0/8)
• 172.16.0.0 to 172.31.255.255 (172.16.0.0/12)
• 192.168.0.0 to 192.168.255.255 (192.168.0.0/16)

Millions of homes use the same 192.168.1.x addresses with no conflict, because these ranges are never routed on the public internet. Your router uses NAT (network address translation) to send every device's traffic out under your one public IP.

On Windows, open Command Prompt and type ipconfig. The "IPv4 Address" line shows something like 192.168.1.23. That's your private IP. The number at the top of this page is your public one. For step-by-step instructions on each system, see how to find your IP on Windows, Mac or phone.

IPv4 vs IPv6: which one do you have?

IPv4 addresses are 32 bits long and written as four numbers from 0 to 255, such as 203.0.113.45. That allows about 4.3 billion addresses. IPv6 addresses are 128 bits long and written as hexadecimal groups separated by colons, such as 2001:db8::1. Many connections today have both. See the full breakdown of IPv4 vs IPv6 differences in our separate guide.

Most people who look up my IPv4 address see a single dotted number. IPv4 ran short because 4.3 billion addresses aren't enough for every device online. IPv6, defined in RFC 8200, has room for 2¹²⁸ addresses, so each device can get its own public address without NAT.

If your ISP and router both support IPv6, your connection is "dual-stack". The result here may then show either address. If you see no IPv6 address, your ISP or router hasn't turned it on. Nothing is broken. Sites you use still work over IPv4.

Adoption differs a lot between countries. Google tracks the share of its users who reach it over IPv6, by country, on its IPv6 statistics page.

What can someone do with your IP address?

Someone with your IP address can see your approximate location, usually the country and a nearby city, plus the name of your ISP. They can't see your name or street address. Only your ISP can link an IP address to a customer account, and it normally releases that record only under legal process, such as a court order.

The real risks are narrower than VPN ads suggest:

• Denial-of-service attacks. In online games or voice chats, an angry player who learns your IP can flood it with traffic and knock you offline.
• Ad tracking. Ad networks combine your IP with cookies to recognize the same household across sites and devices.
• Blocks and bans. Sites use IP addresses for region locks, login rate limits and bans. On a shared address, you can inherit someone else's ban.
• Exposed services. If your router forwards a port to a camera, game server or NAS, anyone who knows your IP can try to connect to it. You can check if a port is open from outside your network.

How to hide or change your public IP

You can change your public IP by restarting your modem, switching to mobile data, or connecting through a VPN or proxy. Restarting or switching networks only gives you a different ISP address. A VPN or proxy hides your public IP: websites see the server's address and location instead of yours.

1. Restart your modem. Most home plans use dynamic addresses, so turning the modem off for a few minutes may get you a new one. A static IP never changes.
2. Switch to mobile data. Your carrier gives you a different public IP from your home ISP. Many carriers share one address among many users (carrier-grade NAT).
3. Use a VPN. It encrypts traffic to the VPN server, and every app shows the server's IP.
4. Use a proxy. It forwards traffic for one browser or app, usually without encryption. Other apps keep using your real IP.

After any change, reload this page to check my IP result against the old one. The IP address, ISP and country should all show the new network. If your home ISP still appears, the VPN or proxy isn't carrying your browser's traffic.

Free IP lookup and network tools on CheckIP

To check IP details for an address other than your own, or to troubleshoot a slow or broken connection, CheckIP has seven more free tools. None of them need an account or an install. Each one does a single job and runs in your browser:

• IP Lookup: look up any IP address or domain to see its ISP, ASN and approximate location.
• Port Scan: test whether a port on an IP or domain accepts connections from the internet.
• Check Host: find where a website is hosted by comparing six GeoIP sources (IPInfo.io, MaxMind, IP2Location, IPGeolocation.io, DB-IP and Cloudflare) side by side.
• Blacklist: see whether an IP address is listed on spam blacklists, a common cause of rejected email.
• Check Ping: measure how long a host takes to respond.
• Check Proxy: paste a proxy list and test which HTTP, HTTPS, SOCKS4 or SOCKS5 proxies are active.
• Speed Test: measure your connection speed.

Frequently asked questions

Why does my IP address change?

Most home and mobile plans use dynamic IP addresses. Your ISP leases an address to your modem for a set period. When the lease ends, when you restart the modem, or after network maintenance, you may get a different one. For an address that never changes, such as for a home server, ask your ISP for a static IP.

Is my IP address the same on Wi-Fi and mobile data?

No. On Wi-Fi, your phone uses your home ISP's public IP, the same one every other device on that router shows. On mobile data, your carrier assigns a different address, often shared with many other subscribers. Turn Wi-Fi off and reload this page: the ISP field switches to your mobile carrier.

Can my IP address show my exact home address?

No. Geolocation databases only store an estimated area for each block of addresses, often a city or the location of your ISP's equipment. When an IP tool drops a pin on a map, that pin marks the database's estimated coordinates, not your building. Here is a closer look at IP location accuracy and what an address can reveal.

Why does CheckIP show the wrong city?

The city comes from a geolocation database, not from your device's GPS. ISPs often route a whole region's customers through equipment in one large city, and they reassign address blocks between areas faster than databases update. Different providers also disagree, which is why Check Host compares six of them for the same address.

What is the difference between my IP and my router's IP (192.168.1.1)?

192.168.1.1 is your router's private address on your home network, the one you type into a browser to open its admin page. The router also has a second, WAN address facing your ISP. Usually that WAN address matches the public IP shown here. If it starts with 100.64 to 100.127, your ISP uses carrier-grade NAT and shares one public IP among several customers.