My "test subject" is my grandmother who died about seven years ago. First at Ancestry.com:
The next is FamilySearch:
While both NEHGS and FamilySearch include social security numbers, I like FamilySearch best because it includes the state of issuance (like Ancestry and GenealogyBank). FamilySearch is also free which makes it even better! Here's hoping they won't be making Ancestry-esque changes to their database anytime soon...
(I also love the One-Step social security number calculators and chart, so the state of issuance isn't that big a deal - as long as you have the number that is)
Disclosure: I am in no way affiliated with any of the websites or companies mentioned in this post, nor was I prompted or remunerated by anyone to write this post.