Who is nationwide mortgage? Established in 1997, Nationwide Mortgage has funded over $4 Billion in mortgage loans. We are a full service-mortgage company based in Mission Viejo, Orange County, California. We are a one-stop-shop of loans secured by real estate. Our products range from Fannie Mae, VA, FHA, to Alt-A, Non-Prime, Private Lending and Hard Money Mortgages.How do i contact the head office at nationwide? Contact Number. 0800 302011; You can get in touch with the Nationwide head office by dialling the number above. You can contact their head office if you would like to be through to a specific department such as complaints, marketing, PR, HR or customer services. When you get dial this number you will be given the following options:How do i make a complaint to nationwide? Contact Number 0800 302011 You can get in touch with the Nationwide head office by dialling the number above. You can contact their head office if you would like to be through to a specific department such as complaints, marketing, PR, HR or customer services.How do i get a quote from nationwide insurance company? If you have a question about your insurance from Nationwide or would like to get a quote, contact us at 1-877-669-6877. We are here to help.