Dell Inspiron 15R
Service tag unrecognised

Hi,

I have purchased dell inspiron 15r laptop recently.

I tried entering my service tag on dell online interface, but it shows that service tag is invalid.

Service tag on My laptop is 15BZ6BS .

Express service code is 2499230152.

My Contact number is: 919773601267

Please do the needful and kindly let me know.