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In the past, the Internet topology was produced by using connection data from Internet Service Provider (ISP). However, if ISPs didn't update connection data or didn't want publish this data, the Internet topology couldn't be produced. Furthermore, there was no relationships information available between the Autonomous System (AS). In this paper, we use a technique, which does not need to use connection data from ISPs, to examine AS path in BGP routing table to produce Internet topology and infer the type of relationships between the ASs within Thailand.