iPhone will remain available for 24 hours

Hi all,

My phone was stolen around a month ago.

I have had four emails the past couple days notifying me -

"iPhone 6s" Was Found !

The last reported location for your iPhone will remain available for 24 hours.

I have logged into my account and tried to access the last know location, as this is stored, but I can't see the location.

The phone is offline.

How can I see the location?

Does apple store this? If so how do I access it?

I really want to locate the phone and get the authorities to track the phone to said address.

Thanks,

Mike