PHH Mortgage | 36,620 followers on LinkedIn. Helping Homeowners is What We Do! NMLS#2726 | PHH Mortgage, a subsidiary of Onity Group Inc. (NYSE: ONIT), is one of the largest servicers of residential mortgages in the United States. PHH Mortgage offers industry-leading mortgage solutions for the entire mortgage lifecycle including correspondent lending, MSR/Co-Issue, subservicing, commercial servicing, reverse mortgages and portfolio retention.