For Colt series,try www.proofhouse.com
If serial number information has been published, you can search through it.
For Colt, go to proofhouse.com
You can't. You have to have the sn to search and then only LE can do it.
Have to know what model of gun it is, than you could search by model and serial number. Try Fulton armory or doing an internet search.
Not certain of your question. Not all guns HAVE a serial number. They were not required on US rifles and shotguns until the 1968 Gun Control Act.
Yes it is illegal to own a gun that does not have a serial number. It is also illegal to remove the serial number off a gun.
With just the serial number, nothing.
It would be almost impossible to identify a gun just by its serial number.
Just by the serial number, no.
Impossible to answer. A serial number is not unique to only one gun in the world.
Impossible to date a gun with just the serial number and no other informaiton.
The serial number is on the frame.