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Ananthapuri Express is an express train running between Thiruvananthapuram Central and Chennai Egmore via Tiruchirappalli and Madurai through the chord line. It is a daily overnight service. From Chennai Egmore, train no:16723 departs by 19:35 hours and reaches Trivandrum Central at 12:10 hours the next day. The parallel train numbered 16724 starts 16:20 Hours from Trivandrum and reaches Chennai around 08:40 hours the next day.