Both Canada Post and the United States Postal Service (USPS) allow you to track packages via their respective websites. You go to the site, type in your tracking number, and you see a helpful screen like the one below.
USPS Tracking Screen
However, sometimes it is easier to have a URL to navigate to, in order to save the work of having to find and type in your tracking number in order to check on the status of your package. Both the Canada Post and USPS website make it difficult for you to find the correct URL, but here they are for your reference:
Tracking a package from the Canada Post website:
http://www.canadapost.ca/cpotools/apps/track/personal/findByTrackNumber?trackingNumber=(tracking number)
Tracking a package from the USPS website:
New version:
https://tools.usps.com/go/TrackConfirmAction_input?qtc_tLabels1=(tracking number)
Old version:
http://trkcnfrm1.smi.usps.com/PTSInternetWeb/InterLabelInquiry.do?origTrackNum=(tracking number)
