Regex Tester & Validator

Matches CAIXA Econômica Federal (Brazilian bank) contract numbers structured as five segments: 2 digits, 4 digits, 3 digits, a variable 1-7 digit contract code, and a 2-digit check/control number, optionally separated by dots, slashes, or hyphens. Useful for validating or extracting contract identifiers (e.g., loans, FGTS, financing) from Brazilian documents and text. With the global flag, it can find multiple contract numbers within a larger input.