How to Monetize Phone List

What are ways to monetize a list of US phone numbers in the education/bizop niche? I tried asking in mobile marketing, but that forum tends to be more about mobile ads, but not so much about phone numbers. I'm clueless, and I'm leaving money on the table. Help?

Are they just "interest" opt in or have they purchased something?

Your post suggests you have a list of mobile numbers, is that right?

The options I see are:

1. Sell the details to a company in the niche
2. Engage with the list yourself.

If you engage yourself, SMS marketing is probably going to be your best option (rather than calling, which is best left to the professionals).

If you SMS, you could either offer products / services directly, or use your campaign to qualify the list further and then sell that (more valuable) information on.

Presumably your list is opt-in? If not, the value is much less.

If your list isn't opt-in you should just get rid of it now. The risk outweighs the tiny possibility for profit greatly.

If it is opt-in, I would just try to sell the list, or sell them ringtones or something. SMS marketing isn't all that profitable.