I'd suggest

1.  Separating the Name column in two different columns: Last Name and
First Name;

2.  I'd suggest removing the last three columns (URL, Version, IP). 
Instead, I'd place them as part of the right-click pop-up dialog, giving it
three options instead of just two, like this:

+----------------------+
| Call this contact    |
+----------------------+
| Add to address book  |
+----------------------+
| More information...  |
+----------------------+

(not in this order, not with these labels, necessariliy).

Thank you very much.