You're forgetting what a Common Carrier is, by definition:
"A common carrier in common law countries ... is a person or company that transports goods or people for any person or company and is responsible for any possible loss of the goods during transport..."
So, a _company_ can be a common carrier. An abstract notion describing interconnected physical entities and organizational entities related to them cannot be a common carrier (nor, in fact, any carrier).
"A common carrier in common law countries ... is a person or company that transports goods or people for any person or company and is responsible for any possible loss of the goods during transport..."
So, a _company_ can be a common carrier. An abstract notion describing interconnected physical entities and organizational entities related to them cannot be a common carrier (nor, in fact, any carrier).