Use the AccessEngineering database to search for information on international building codes. Use the Codes & Standards filter on the left to limit to the code you need.
The National Fire Protection Association provides access to safety standards for fire, electrical and life. They do provide access for free although you'll need to create an account.
The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.
The International Code Council Digital Codes are an authoritative database of model codes, standards, and supplements. Please note - some content is only available with a premium subscription.