*Please do not change the capitalisation of this name!*
It is spelled "blink-182", as opposed to "Blink 182", "Blink-182", or "blink 182". It appears that way on most releases and on their official website.
The only exceptions are 'Buddha' and 'Dude Ranch', where it appears as BLINK 182: https://web.archive.org/web/20081024032724/http://www.blink182.com/discography/?Page=all (scroll down)