You can search the Delaware County, Pennsylvania, phone directory on DexKnows.com and SpringfieldDelawareCounty.AreaConnect.com, as of 2015. Both websites also feature a reverse phone number lookup tool.
You can search for numbers in Delaware County on SpringfieldDelawareCounty.AreaConnect.com by typing the name of the person or business in the What field, "Delaware County, PA" in the Where field and clicking Search. A list of possible matches is displayed on the next page with phone numbers and addresses.
You can search the Delaware County directory on DexKnows.com by typing the name of the person in the first blank, "Delaware County, PA" in the next blank and clicking the Search icon.