Sub-Group Identification Number [SGIN] Law and Legal Definition

Sub-Group Identification Number or the SGIN is a numeric extension of a Taxpayer Identification Number (TIN). It enables Federal Communication Commission (FCC) licensees to share a common TIN but register separately in FCC Universal Licensing System (ULS). The licensees are given SGIN because they are sub-groups or subsidiaries of a common "parent" organization. Each sub-group or subsidiary can use a separate TIN/SGIN combination to identify its associated call signs in ULS. The SGIN also helps in distinguishing the parent company from other sub-groups or subsidiaries for application and licensing purposes.