As a private citizen, you can't.
Law enforcement only.
Depends on the laws in your state or country. In the US, firearms registration is virtually nonexistent, save for NFA regulated firearms, and in the state of California (which, even then, is very limited in the scope of what gets registered).
Ca doj
Firearms are not required to be registered in SC.
No system to do that. Most of the US does NOT require firearms to be registered.
Check with the organization that is responsible for registering firearms where you live.
Go out and find a "catalogue of Firearms" in a book store, you will find the answer there. <><><> There are several THOUSAND gun makers.
Angie's List
AFAIK no such list exists for the public to view.
In those jurisdictions where firearms must be registered, those records should be confidential. If you are not a law enforcement officer, you have no reason (or right) to know.
To find out if you are on the waiting list for an organ transplant, talk to the transplant coordinator at the hospital that your are registered with. If you wish to find out if you are a registered organ donor (in the UK), look at www.organdonation.nhs.uk/
AnswerThis question is a bit confusing. If they are registered in YOUR name, YOU must have registered them, you should know what agency you registered them with, and they should be in YOUR gun safe.