Using LaTeX, how can I make vertical phone number "tear-offs" for a poster?

Using LaTeX, how can I make vertical phone number "tear-offs" for a poster?

I've searched all over for an example of this, but h开发者_如何学编程aven't found anything yet. I'm thinking I need to use something like the textpos package or do some table mangling, but I haven't hit gold yet.

FYI I'm using the article document class for this.

rotatebox can rotate your text.

\rotatebox{90}{vertical text}