See information about devices signed in with your Apple ID
If you’re signed in on a device with your Apple ID, you can access the content you have stored in iCloud from that device. See What is iCloud?
You can see a list of your devices – iPhone, iPad, iPod touch, Mac, Apple Watch, Apple TV (3rd generation or later) and HomePod – that are signed in with the same Apple ID. Depending on the device and where you view the list, you can see the device’s serial number, remove the cards you use with Apple Pay, see if iCloud Backup is turned on, and more.
See devices on iCloud.com
You can see your online devices when you sign in to iCloud.com with your Apple ID.
On iCloud.com, go to Account Settings.
In the My Devices section, select a device in the list. You can view the following information:
Model: The model is listed under the device’s name in the devices list.
Apple Pay: If Apple Pay is turned on for a device, you see a list of the cards you use with Apple Pay. To remove them from the device, click Remove or Remove All.
Serial number and IMEI: You see the device’s partial serial number or IMEI (if applicable). To see the complete number, view the devices list in the Settings app on an iPhone, iPad or iPod touch, or in System Preferences on a Mac.
iCloud Backup: If iCloud Backup is turned on for an iPhone, iPad or iPod touch, you see the date and time of the last backup.
You can remove a device from the devices list by clicking 
next to the device. If you don’t see the Delete button, click Remove Device.
See devices on an iPhone, iPad or iPod touch
You can see your devices on an iPhone, iPad or iPod touch signed in with your Apple ID.
On your iPhone, iPad or iPod touch, go to Settings > [your name], then scroll down to the devices list.
Select a device in the list. You can view the following information:
Find My: You see if Find My [device] is turned on or off. If you need to turn on Find My, see Add your devices to Find My.
iCloud Backup: If the device is an iPhone, iPad or iPod touch, you see if iCloud Backup is on or off and the date and time of the last backup.
Device information: You see the model, software version, phone number, serial number, and IMEI, if applicable for the device.
Trusted device: Below the Device Info section, you see whether or not the device can receive codes when you verify your Apple ID.
Apple Pay: If Apple Pay is turned on for a device, you see a list of the cards you use with Apple Pay. To remove them from the device, tap Remove All Items or Turn Off.
You can remove a device from the devices list by clicking the Remove from Account button.
See devices on a Mac
You can see your devices on a Mac signed in with your Apple ID.
On your Mac, choose Apple menu
> System Preferences and then do one of the following:macOS 10.15 or later: Click Apple ID.
macOS 10.14 or earlier: Click iCloud, click Account Details and then click Devices.
Select a device in the list. You can view the following information:
Device information: You see the model, software version, phone number, serial number and IMEI, if applicable for the device.
Find My: You see if Find My [device] is turned on or off. If you need to turn on Find My, see Add your devices to Find My.
iCloud Backup: If the device is an iPhone, iPad or iPod touch, you see if iCloud Backup is on or off and the date and time of the last backup.
Apple Pay: If Apple Pay is turned on for a device, you see a list of the cards you use with Apple Pay. To remove them from the device, click Remove All Cards or Turn Off Apple Cash.
You can remove a device from the devices list by clicking the Remove from Account button.
If one of your devices isn’t listed, make sure you’re signed in on the device with your Apple ID.
When you remove cards from Apple Pay, credit, debit and student ID cards are removed even if your device is offline. Express Transit cards are removed the next time your device goes online. To add cards back to the device, see the Apple Support article Manage the cards that you use with Apple Pay.