In adding LastPass to a new device, LastPass asked me to confirm that the devices in my Account Settings > Mobile Devices list were the devices I wanted to have access to my vault. This is especially relevant in light of the recent hacking at LastPass.
Unfortunately, I was unable to correlate the Label or Random Identifier that LastPass displays with anything on my phone or computer.
An email I received back from LastPass support, said ...
"We checked on the labeling issue, unfortunately we don't have a way of finding that identifier on the phone configuration. Please submit your feedback using the link below so this can be added as a future feature:"
Suggestion: Display an identifier in the Label or Random Identifier field that can be found on the computer or mobile device using LastPass.