Mass insert in large database

Dear Gurus,
I have a database of about 34,000 rows. These represent three months worth of driving data. I need to insert the home zip code "90058" (column I-ship_zip) BEFORE and AFTER each Route (column A). The routes have different number of stops, thus different number of rows. I have attached part of the file in question. How to do it?
Thank you very much.