Vault 101 and Vault 112. All the others were social experiments.
Erm, you might wanna take out Vault 112. If you think about it, it was a "toychest" Vault, designed to be the plaything for Dr. Braun. While this wasn't intended by Vault-Tec, it still counts as a "social experiment" Vault. So only Vault 101 is "non-hostile", and that can change depending on player actions.