No, they’re different. The Common Reference Number (CRN) is issued to SSS members who apply for a Unified Multi-Purpose ID (UMID). It links the ID numbers of SSS, GSIS, Pag-IBIG Fund, and PhilHealth. It’s printed on the upper right of UMID cards issued since 2011. These numbers also differ in format. The CRN consists of 12 digits in this format: ####-#######-#. Meanwhile, the SSS number has ten digits in this format: ##-#######-#.