Which of the following is FALSE regarding the 16-bit public autonomous system numbers?

Which of the following is FALSE regarding the 16-bit public autonomous system numbers?

A. They are allocated to the RIRs by ICANN/IANA.

B. They are used when connecting ASs on the Internet.

C. They range from 1 to 56319.

D. They are assigned by the ISPs for enterprise networks.

Answer: D