How to Read an Edexcel Paper Code: 4PH1, WPH11, 4MA1 and More If you've ever searched for an Edexcel past paper, you've probably seen codes like: 4PH1/1P 4MA1/2H WPH11/01 WBI11/01 At first, these codes can look like random combinations of letters and numbers. They're not. Edexcel uses these codes to identify qualifications, subjects, units and individual examination papers. Once you understand the basic structure, finding the correct Edexcel past paper becomes much easier. In this guide, we'll break down some of the most common Edexcel IGCSE and International A Level paper codes , including 4PH1, 4MA1 and WPH11 . Quick answer: The first part of an Edexcel code usually identifies the qualification, subject or unit, while the part after the slash identifies a particular paper or paper version. However, the exact structure depends on the qualification. What Is an Edexcel Paper Code? An Edexcel paper code is an identification code used by Pearson Edexcel to distinguish qu...