From Google Material icon library:



Random Icon I found online that looks more like an actual rolodex card and communicates the concept more clearly in my opinion:

Similar icons that don't quite work:
book-open icon. It _could_ get the point across, though it's more ambiguous and generic.tel: links or phone form fields.This was the best I could come up with, others would end up looking really cramped.

If you're talking about the one in the middle...
Yeah, I think that's great. Pretty similar to the Google Material icon. Thanks!
Yes the one in the middle :smile:
Will submit a PR tomorrow
Most helpful comment
This was the best I could come up with, others would end up looking really cramped.