Clean my database with 1,600 addresses

Hello, I have a database of 1,600 mailing addresses (.csv file) that needs to be cleaned up. The printer who is fulfilling my mailing needs to have the addresses formatted with street address, city, state, and zip as separate columns. Unfortunately our database system does not export as separate columns. It only exports as full address in one column. So I'm looking for someone to go through and separate the fields manually. I also need to mark international addresses as "N/A OVERSEAS" in the zip code column. Hello, I have a database of 1,600 mailing addresses (.csv file) that needs to be cleaned up. The printer who is fulfilling my mailing needs to have the addresses formatted with street address, city, state, and zip as separate columns. Unfortunately our database system does not export as separate columns. It only exports as full address in one column. So I'm looking for someone to go through and separate the fields manually. I also need to mark international addresses as "N/A OVERSEAS" in the zip code column.