Looking for CRM tool for direct mail campaign

[Don Chambers]

I would like a CRM that let's me start with just a phone number.  Does anyone know of such a product?

I have a lot of calls from a direct mail campaign.  Most calls are missed and they hang up (I'm working on this).  I know they came from the direct mail campaign because that's all I use the number for.  I need a tool where I can store the number and then me (and some helpers) can go through the list calling them and adding the other details as we get them.

Here are my requirements:

• Create a lead with just a phone number.
• Allow import/export of data.
• Allow multiple users.
• Be mobile friendly.

Everything I have tried requires an address or a name to create the lead.