May I ask how you would use that information? It would help me to know. We've found that's not something consumers generally need. We don't currently show them in the interest of keeping our site as simple and uncluttered as possible.
Many manufacturers use model numbers in their FCC IDs, which we do show. That's one way to see them for some phones.
Also, if you know a potential model number, you can search by it. For example, if you search for "XT907", you'll get the Motorola RAZR M.