CUSIP Validator

CUSIP is short for "Committee on Uniform Securities Identification Procedures" and is a nine-character alphanumeric code that uniquely identifies securities in North America.

Every CUSIP code is exactly 9 characters, split into parts that each encode something specific. Those rules are hard to read by eye. The validator on this page breaks any code into its parts and labels what each one means.

Checking a CUSIP code by hand means verifying its length, character format, and any checksum digit. That is easy to get wrong. Enter a code on this page and the validator runs all three checks at once, then explains why it passed or failed.

CUSIP codes are issued by CUSIP Global Services (CGS) under the ANSI X9.6 standard. One authority and one shared standard are what let the same code identify the same instrument across markets and data providers.

Most checkers return only pass or fail. This one breaks a CUSIP code down position by position and explains in plain language what each part means. For codes that map to a single security, it also links to that specific stock.