I will just answer both questions.
If you are curious about tracking sex offenders, this information is considered public. Anyone can look up where a sex offender is. There is even a website to look up such info. You can go here and search all over Indiana for sex offenders, either by a particular address, zip code, city, name of offender, etc..:
As far as the restrictions one where a sex offender can live, this is governed by IC 35-42-4-11. I will post the relevant info here:
(c) An offender against children who knowingly or intentionally:
(1) resides within one thousand (1,000) feet of:
(A) school property, not including property of an institution providing post-secondary education;
(B) a youth program center; or
(C) a public park; or
(2) establishes a residence within one (1) mile of the residence of the victim of the offender's sex offense;
commits a sex offender residency offense, a Class D felony.