  The DNS root server system uses Anycast technology to provide resolution
through widely distributed root nodes. In recent years, the F-root node has
seen astonishing growth and now boasts the largest number of nodes among the 13
root servers. Based on Ripe Atlas measurement data, we examined the
availability and query latency of the F-root within the Southeast Asian region
historically. The collected data illustrates how latency varies with changes in
the number of root nodes, how the geographic distribution of responding root
nodes changes in different periods, and examines the most recent differences
between countries in terms of latency distribution. This study sheds light on
the evolving landscape of DNS infrastructure in Southeast Asia.
