What is zipcode asking about may application to careerhound. housekeeper application.

ZIP is an acronym for Zone Improvement Plan. That is your postal code where you are located in what city or area.
For instance:
Mr. John Smith 123 Sycamore Avenue Beverly Hills, California 90210


The numbers in bold is the Zip Code. It differs from country known in various countries as post code postcode or postal code. where you are located city or township you are located. Just check your mail mails and bills. There's always a zip code in your address.
Hope this helps.