Does my phone and computer have the same IP address?

Q: Does my phone and computer have the same IP address?

Devices commonly have different local IP addresses on the same network. Your public (external) IP can be the same for multiple devices behind one router. If one device uses mobile data, it usually has a different public IP. You can compare local IPs and public IPs to understand what’s happening.

Direct answer

Usually, no: your phone and your computer typically do not have the same IP address simultaneously. They may share the same external (public) IP address while still having different local (private) IP addresses on your home or office network.

A simple model: local vs. public IP

An IP address depends on where you look:

Local (private) IP: Inside your Wi‑Fi or home network, devices commonly get their own local address. So your phone and computer will often show different local IPs.
Public (external) IP: From the internet’s point of view, traffic from your router often exits through one public IP. In many setups, both your phone and computer appear to the outside world behind the same public IP.

This is why you can sometimes see “the same IP” when checking public IP, even though the two devices are not using identical addresses internally.

Differences and limits that change the outcome

Several situations can make the results differ:

Switching networks: If your phone is on mobile data while your computer is on Wi‑Fi, the phone’s public IP will typically be different.
Different local network segments: Guest Wi‑Fi, workplace networks, or separate network setups can cause different local IPs and sometimes different visible external behavior.
Advanced router behavior: Some routers or network configurations can affect how addresses are assigned or routed, which may change what you see as “local” or “public.”

Also note that what people call “your IP address” can be ambiguous—different websites and device screens may show either local or public information.

What you can check to confirm

To determine whether they truly share an IP, compare both layers:

Check local IPs on the phone and computer (the addresses assigned inside the Wi‑Fi/network).
Check public IPs by using a trusted “what is my IP” style lookup from each device (this reflects the outside-facing view).

If the local IPs differ but the public IPs match, that is the common outcome for two devices behind the same router. If both local and public IPs differ, it often means the devices are not using the same external routing path (for example, different networks).