How many devices are signed into my iCloud

See your devices

1. On iCloud.com, go to Account Settings.
2. In the My Devices section, select a device in the list.
3. Note: If one of your devices isn’t listed, make sure you’re signed in on the device with your Apple ID.
4. You can view the following information:

• • The device model
  • A list of the cards you use with Apple Pay on the device (if applicable)
• The device’s partial serial number or IMEI (if applicable)
  • Tip: To see the complete serial number or IMEI number, view the devices list in the Settings app or in System Preferences on your Apple device.
  • The date and time of the last backup (if iCloud Backup is turned on for an iPhone, iPad, or iPod touch)