Finding the SSID (Service Set Identifier) for your iPhone is easy:
1. Open the Settings app on your iPhone and select Wi-Fi.
2. Find the network that you are currently connected to, and it will display the SSID beside it.
If you don’t have Wi-Fi enabled on your iPhone and want to look up the SSID of a nearby network, open the Wi-Fi section of your settings and look for the network you want to connect to. The network SSID should be listed beside it.
You can also use your iPhone to scan for available Wi-Fi networks to look up their SSIDs. To scan for available networks, open the Wi-Fi section of your Settings app, tap the name of the current network, and then tap the Scan option from the Wi-Fi menu. This will display all networks in range, along with their SSIDs.