This app shows informations about your device and network connection:

Wifi SSID
Wifi BSSID
Wifi Ip address
Wifi Default gateway
Cellular internal Ip address
Wifi Internet Ip address
Vpn Ip address
Dns Ip Address
Host name
Carrier Info
Bytes sent and received with Cellular and Wifi connections
A list of network interfaces
Other information about your device

Some of your iPhone information can also be viewed on your Apple Watch