The Mumbai-Ernakulam Netravati Express (Then number 6635/36; now 6345/46 with extension to Thiruvananthapuram) was re-routed via Konkan Railway w.e.f. March 21, 1998.
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The Inaugural run on KR was on March 21, 1998 and not on March 1, 1998. Plz Change
Source - Wikipedia