Receptor for calcitonin-gene-related peptide (CGRP) together with RAMP1 and receptor for adrenomedullin together with RAMP2 or RAMP3. The activity of this receptor is mediated by G proteins which activate adenylyl cyclase (By similarity). Heterodimer of CALCRL and RAMP3 (By similarity). Heterodimer of CALCRL and RAMP1 or CALCRL and RAMP2 (By similarity). Expressed predominantly in the lung, thymus, heart and brain. Belongs to the G-protein coupled receptor 2 family.