By using below link you can track your package,
USA : https://tools.usps.com
UK : https://www.parcelforce.com/track-trace
AUSTRALIA : https://auspost.com.au/track/
NEW ZEALAND : https://www.nzpost.co.nz/tools/tracking
RUSSIA : https://www.pochta.ru/tracking
For ALL Countries : http://ipsweb.ptcmysore.gov.in/ipswebtracking/