Depending on your ISP, the IP address could change frequently after the lease expiration. Most of the time, the reason for a sudden change in an IP address is typically due to an interruption between your router and the internet. ... Upon reconnection to the internet, your ISP will assign a new IP.

How often do IP addresses change?

Every 14 days there is a DHCP lease renewal that takes place that acts kind of like a handshake between the ISP and a household modem. If the connection is still valid the ISP will move on and not disrupt service via provisioning a new IP address.

Do device IP addresses change?

When a device is assigned a static IP address, the address does not change. Most devices use dynamic IP addresses, which are assigned by the network when they connect and change over time.