Source User Gender and Age from IP Address / Operating System / Device

Hi guys,

So I run a radio network that injects adverts based on user information.

It would help my CPM rate if I could source the users gender and age, but this is not possible due to the way my listeners tune in. I do, however, have access to the following information:

IP Address
Operating System
Device

My question then, is there a database I can tap into somehow, that will return the users age and sex based on the three parameters above? I understand that it won't be exact, but I am just wondering whether it is possible?

Thanks

Id be interested in this too

Do you have access to ANY other form of Meta Data or headers? Is this a web-based service? Or through an App like TuneIn kind of thing?

Otherwise a small "semi" accurate algorithm could be done based on a few assumptions:

1) iOS devices have a higher rate of Female use, while Samsung devices(android in general) tend to be favored by Males.
2) Relative gender population based on IP Reverse-Lookup.
3) Operating system bias is the same as device bias.

By default you've already got a 50/50 chance of getting it right. Edging with the above in mind you could probably up that to somewhere between 70-80%, or even higher in some instances.

Listeners come from directories such as iTunes etc. We only get the basic http header.