Checking the first and last characters of a cryptocurrency address?

Checking the first and last characters of a cryptocurrency address?

When confirming that an address entered on a site/app is what I expect it to be, I often check the first and last 3-4 characters to see if they match.

Is this practice dangerous? Could an attacker feasibly generate an address that matches at the beginning and end, but is different in the middle?

https://ift.tt/2KjHzlI