Sex Offender Registry?

I'm looking for a specific website that allows your to enter your address or zip code & it populates an overlay of color coded dots of all of the registered sex offenders living within that geographical area.

I found it once & apparently forgot to save it to my favorites. I've got a couple of parents with small children that would like to have that site to add to their web favorites.

LEO's- Thanks for any assistance you can provide, and stay safe out there. Make sure you go home to your families every night.