Looking for post codes

[Aronski]

Hi all, I'm looking for the postcode of a family I lived with in Kiev around 5 years or so ago. I have looked everywhere on the net but it seems that there are a billion post codes for Kiev alone.
I am trying to send a letter to Valera Davidovna, she lives in Apartment 76, 23 Kravchenka st in Kiev. Is there someone out there who thinks that they can find the correct post code?
Also wondering if anyone knows of the Pushkin High School in Kiev (I forget the correct title) and if anyone out there living in Kiev has ever been there.
Just trying to reconnect with people with whom I have since lost touch.
Spaceeba
AAron