There should be white space. Some ministerial associations have lists. If at all possible, lists should have the names of the pastor, priest, rabbi, or imam. Denominational directories are the best source for this. The most complete list of all congregations is in the Yellow Pages.
None have zip codes.
Obtaining these from a zip code directory is a volunteer job. Associations are also a good source. Some of these are the local affiliates of The National Sunday School Association, National Association of Evangelicals, National Council of Churches and the National Council of Christians and Jews. The most effective method of assuring a good attendance is through follow-up phone calls. This is also the most difficult to implement.