Quote from srinivas9931 on February 12, 2018, 17:34
sir my tracking number is RY816919305CN
i lost my mobile number , tracking is not updated from past 3 day

09/02/2018 12:01:21 India KOLKATA FOREIGN LCAO Transfer from office of exchange (Inb) Air CHENNAI (MADARS) AIR
09/02/2018 11:05:15 India KOLKATA FOREIGN LCAO Receive item at office of exchange (Inb) Air
04/02/2018 13:21:00 China GUANGZHOU Insert item into bag (Otb) Air KOLKATA AIRPORT SORTING OFFICE
04/02/2018 10:00:00 China GUANGZHOU Send item abroad (EDI-received) Air KOLKATA AIRPORT SORTING OFFICE
03/02/2018 03:18:00 China 51810302 Receive item from customer (Otb) Air KOLKATA AIRPORT SORTING OFFICE

where is my package? how to change my mobile number
is it sucked in custom office?

the parcel is in India Post office in CHENNAI airport. You should google their phone number and call them for delivery schedule.