Shared cell surface receptor required for the activation of five class 2 cytokines: IL10, IL22, IL26, IL28, and IFNL1. The IFNLR1/IL10RB dimer is a receptor for the cytokine ligands IFNL2 and IFNL3 and mediates their antiviral activity. The ligand/receptor complex stimulate the activation of the JAK/STAT signaling pathway leading to the expression of IFN-stimulated genes (ISG), which contribute to the antiviral state. Heterodimer with IFNLR1. Genetic variations in IL10RB influence susceptibility to hepatitis B virus (HBV) infection [MIM:610424]. The disease is caused by variants affecting the gene represented in this entry. Belongs to the type II cytokine receptor family.