Combining with any member of the calcitonin family (e.g. adrenomedullin, adrenomedullin 2 (intermedin), amylin, calcitonin and calcitonin gene-related peptides (CGRPs)) to initiate a change in cell activity. [ http://www.ncbi.nlm.nih.gov/pubmed/12037140 http://www.ncbi.nlm.nih.gov/pubmed/10871296 GOC:bhm http://www.ncbi.nlm.nih.gov/pubmed/18687416 http://www.ebi.ac.uk/interpro/entry/IPR003287 ]