[http://www.cisco.com/web/about/ac123/ac147/archived_issues/ipj_9-1/autonomous_system_numbers.html Exploring Autonomous System Numbers]</ref> This means that the available quantity of ASNs for Internet routing is limited. | [http://www.cisco.com/web/about/ac123/ac147/archived_issues/ipj_9-1/autonomous_system_numbers.html Exploring Autonomous System Numbers]</ref> This means that the available quantity of ASNs for Internet routing is limited. |