To find your IP address from your Cisco phone please do the following: 

Cisco SPA502G, Cisco SPA504G, Cisco SPA508G, Cisco SPA509G, Cisco SPA512G, Cisco SPA514G:

1. Press the Setup button as shown below:

2. Scroll to network and press select

3. Scroll to View Current IP. This is the IP address of your phone

Cisco SPA501G: 

1. Press the Setup button

2. Enter 110, then press #

3. The IP address is recited

Cisco SPA300 series:

To find the IP address on a Cisco SPA 300 series phone please press the Set Up button and then press 9 which will provide you with the IP address of your phone.