The subscriber database is an ordinary text file consisting of lines of the form
lastname, firstname (na.key) email-address
These lines are sorted lexicographically by lastname then firstname.
The format of the Whitepages Database is as follows:
The fields are, in order:
last name
first name
middle name
other name
affiliation
office address
city_state_zip
country
office phone
research
home address
home phone
fax
email address
other
date -- preferably in rfc 822 format
added by -- email address of whoever added
the record