Windows 10 - View SIM Card Number
Here's how to view the number for the SIM card associated with your Windows 10 device.
- From the Windows desktop, navigate:.
- From the left-pane, selectCellular.
- From the Cellular section, if necessary, selectVerizon Wireless (LTE).
- SelectAdvanced options.
- From the Properties section, view the SIM ICCID.
You can also remove the SIM card and view the 20-digit SIM card number (with the gold contacts facing away). 
Not available on all Windows 10 devices.