One of the vital parts of the Internet topology structure of a country is its national borders with other countries, this is the outermost part of a country's Internet topology. The purpose of this study is to analyze the national borders of Indonesia's Internet topology at the autonomous system (AS) level, in the period 2010 to 2019. The main processes involved in the research include collecting datasets from various sources, mapping the Indonesia's Internet topology borders in graph representation, then analyzing them. The three main components analyzed are Indonesia's AS which acts as a client (AS-ID Border), non Indonesia's AS which acts as a provider (AS Provider), and the customer to provider interconnection (C2P Border-Provider) between the two. The results of the analysis show that the role of an AS-ID Border has grown over time. The analysis also shows that there are four AS-ID Border that are dominant in the number of C2P Border-Provider in the last ten years, namely: AS7713 (ID), AS4761 (ID), AS17451 (ID), and AS23947 (ID). Meanwhile, for AS Provider, United States (US) and Singapore (SG) are the two countries that have AS Provider with the highest number of C2P Border-Provider at the national borders of Indonesia's Internet topology in the last ten years.