Can I get all the connected devices ip addresses of router using ESP8266?

I need to check that a static ip is connected or not with router repeatedly after few seconds. I've used ping tool but it was not enough. So is there any way to get all the connected ip address of router so that i can match with static ip to decide that the device is connected or not?

ping. Why wasn't it enough?

Although the device is connected, but pinger response does not receive any packet. It happens when device (android) is not used for a longer time(monitor light off for few time).