Yes OT is between VZM-VSKP. This train start 2 min late from VZM and arrives 10 min early at VSKP. This is official website timings
18463 +PRASANTHI EXP
#VIZIANAGRAM JN 11:35 VISHAKAPATNAM 12:45 01:10 Y Y Y Y Y Y Y
12867 +HWH PDY EXP
#VIZIANAGRAM JN 11:37 VISHAKAPATNAM 12:35 00:58 Y N N N N N N