Your internet service provider owns the IP address assigned to your home or phone

The internet service provider (ISP) that you pay for internet service — Comcast, Verizon, AT&T, or a local provider — owns and controls the IP address your devices use to connect to the internet. You do not own it. You lease it, the same way you lease a phone number from a mobile carrier. The ISP assigns that address to your account, and it can change or be reassigned to someone else if you cancel service or move.

This matters because your IP address is how the internet knows where to send data back to you. When you visit a website, that site's server logs your IP address. Your ISP can see every website you visit and every service you connect to, because all that traffic flows through their network. Law enforcement and civil courts can subpoena your ISP to find out which customer was using a specific IP address at a specific time.

The address itself is a series of four numbers separated by periods — something like 203.45.67.89. That format is called IPv4. Newer networks use IPv6, which looks like a longer string of letters and numbers. Either way, the ISP owns it and assigns it to you temporarily.

Key Takeaways

  • Your ISP owns your IP address and can change it without warning, especially if you restart your modem or move to a new location.
  • Websites and online services log your IP address when you visit, so your ISP can see which sites you connect to.
  • Law enforcement can subpoena your ISP to learn which customer was using a specific IP address on a specific date.
  • A static IP address stays the same, while a dynamic IP address changes periodically; most home internet uses dynamic addresses.
  • A VPN masks your real IP address by routing your traffic through another company's server, though that company then sees your activity instead.

Static versus dynamic IP addresses and what changes them

Most home internet customers get a dynamic IP address, which means the ISP can reassign it to you or to someone else. Your address might stay the same for weeks or months, but it can change when you restart your modem, when your ISP performs maintenance, or when your service contract renews. You have no control over when this happens.

A static IP address stays the same indefinitely. Businesses often pay extra for static addresses because they run servers that need a permanent location. If you run a small web server from home or host a game server, a static address makes it easier for people to find you. Most ISPs charge $5 to $15 per month for a static address, though some include it free with certain plans.

You can request a static address from your ISP, but they are not required to provide one. If your ISP denies your request or charges too much, you have limited options — you can switch providers if another one serves your area, or you can use a dynamic DNS service, which automatically updates a domain name whenever your IP address changes.

How IP addresses are distributed and who controls them

IP addresses are not randomly assigned. They are organized into blocks, and those blocks are controlled by five regional organizations called Regional Internet Registries (RIRs). Each RIR covers a geographic area: ARIN covers North America, RIPE NCC covers Europe, APNIC covers Asia and the Pacific, LACNIC covers Latin America, and AFRINIC covers Africa.

These organizations do not own the addresses themselves — they manage the distribution. An RIR allocates large blocks of addresses to ISPs, and the ISP then assigns individual addresses to customers. When you look up an IP address using a tool like WHOIS, you can see which RIR allocated that block and which ISP currently controls it.

This system exists because the internet needs a way to route data correctly. Your IP address tells other networks where you are located geographically and which ISP to contact if they need to reach you. Without this organization, the internet would not know how to deliver your data.

What websites and services see when they log your IP

Every time you visit a website, that website's server records your IP address in its logs. The site does not know your name unless you log in or enter personal information, but it knows your approximate location (usually your city or region), your ISP, and the exact time you visited. If you visit the same site multiple times from the same IP address, the site can track that you are the same person across visits.

Online services use IP addresses to detect fraud, enforce geographic restrictions, and comply with laws. A streaming service might block access from certain countries by checking your IP address. A bank might flag a login from an IP address in a different country as suspicious. A website might refuse service to IP addresses known to be used by bots or hackers.

This is why your IP address is considered sensitive information. Someone who knows your IP address can learn which websites you visit, when you visit them, and roughly where you are located. They cannot see the content of your communications if you use HTTPS (the padlock icon in your browser), but they can see that you visited a site.

How a VPN masks your IP address and what it costs

A virtual private network (VPN) is a service that routes your internet traffic through a server operated by the VPN company instead of directly to the websites you visit. When you use a VPN, websites see the VPN server's IP address instead of your real address. Your ISP can see that you are using a VPN, but they cannot see which websites you visit.

VPNs are useful if you want to hide your browsing from your ISP or if you are on a public WiFi network where other people might intercept your data. However, using a VPN does not make you anonymous — the VPN company itself can see all your traffic, and they can log your activity just like your ISP can. Some VPN companies keep detailed logs; others claim not to keep logs at all, but you have to trust their word.

Most VPN services cost $3 to $12 per month, though some offer free versions with limitations like slower speeds or fewer server locations. A free VPN might make money by selling your data to advertisers, so a paid service is usually safer if privacy is your concern. VPNs also slow your internet speed slightly because your traffic has to travel through an extra server.

IP addresses and privacy: what you should know

Your IP address alone does not reveal your identity, but it can be linked to your identity if someone knows your ISP and the time you were online. Law enforcement regularly subpoenas ISPs for this information. If you post something illegal or threatening online, investigators can use your IP address to identify you, even if you thought you were anonymous.

Websites can also combine your IP address with other information to identify you. If you log into your email account from a particular IP address, and then visit a website from that same IP address, the website might be able to connect those activities to you. This is why advertisers and data brokers are interested in IP addresses — they help build profiles of who you are and what you do online.

If privacy is important to you, understand that hiding your IP address is only one part of the picture. Your browser sends other identifying information, like your device type and browser version. Websites can also use cookies and tracking pixels to follow you across the internet. A VPN helps, but it is not a complete solution.

What happens to your IP address when you change providers or move

When you cancel service with one ISP and sign up with another, your old IP address goes back into the ISP's pool and is reassigned to a new customer. The new ISP assigns you a new IP address from their own pool. This process is automatic and happens within hours or days of your service change.

If you move to a new location but keep the same ISP, your IP address usually changes because the ISP assigns addresses based on your location. Some ISPs allow you to keep the same address if you move within their service area, but this is not may provide. If you want to keep the same IP address when you move, request a static address before you relocate and confirm that your new location is covered by the same ISP.

This is why IP address logs are not reliable for identifying someone over long periods. An IP address might have belonged to one person last year and a different person today. Law enforcement has to cross-reference the IP address with the ISP's customer records and the exact date and time of the activity to identify someone accurately.

Frequently Asked Questions

Can I buy an IP address?

No. IP addresses are managed by ISPs and regional registries, not sold to individuals. You can request a static IP address from your ISP for a monthly fee, but you are still leasing it — the ISP retains ownership. If you need a permanent web address, buy a domain name instead, which you can point to your IP address.

Does a VPN hide my IP address from my ISP?

A VPN hides which websites you visit from your ISP, but your ISP can still see that you are using a VPN and how much data you are sending. The VPN company sees your real IP address and can see all your traffic. You are trading privacy from your ISP for privacy from websites, but trusting the VPN company instead.

What if someone uses my IP address to do something illegal?

If someone hacks your WiFi or spoofs your IP address, law enforcement will initially trace the activity back to your ISP account. You will need to prove to the ISP and police that you were not responsible — usually by showing that your WiFi was unsecured or that someone else had access to your network. find your WiFi with a strong password to reduce this risk.

Does restarting my modem change my IP address?

Usually yes, but not always. Most ISPs assign dynamic IP addresses that change when you restart your modem, but some ISPs keep the same address for a period of time. If you need a consistent IP address, request a static address from your ISP or use a dynamic DNS service that updates automatically when your address changes.

Can I see my own IP address?

Yes. Search "what is my IP address" in any search engine and it will display your current IP address. You can also find it in your device settings — on Windows, open Command Prompt and type "ipconfig"; on Mac, go to System Preferences and check Network settings. This is your address as seen by the internet, not necessarily the address your device uses on your home network.