text: how can i find a 25-year long lost firend in seoul from california? i have his personal information, old address. that's all i have. you can do a reverse search on the property, get his dads name and track him through the property tax roll, then locate your friend that way. county records is key, voter registration. www.555-1212.com, www.publicdate.com, these are a few search sites which may help.  good luck.