Need to do a reserve phone lookup? There are many reasons to need a reserve phone lookup. Unknown numbers on your phone is one of the most frequent reasons to do a reserve phone lookup. Of course, unknown phone numbers on your spouse's phone can also be a valid excuse for a reserve phone lookup. Then, there are the phones your children use. Every parent feels the need to protect their children from would be predators. And in this day and age they seem to be everywhere. You can't be too careful when it comes to your children. So, doing a reserve phone lookup on numbers you don't recognize on your child's phone is a reasonable response. This has nothing to do with you not trusting your child. It has to do with making sure they are safe. Ivestigative websites that do reverse phone lookups are plentiful. But, very few let you try the service for $1. That is just what you will get with Phone Registry.