With so many phone numbers nationwide... the number of groupings is limitless So, if you've been trying to find a specific number with a 831-588 area code exchange, you you now can. With the assistance of reverselookupphonedirectory.com, all you have to do to find information on a person with a 831-588 is enter their entire nine digit numberr into the provided search area. That is all you need to start your research. The days of looking for background information from different sources are done.