I was recently tasked with setting up an Autonomous System Number (ASN) which is a unique number to identiy companies that want to control their own routing of public IP space. In my case, the company wants to design their network for ISP redundancy using BGP. In the United States, all ASN’s are registered through the American Regristry for Internet Numbering (ARIN). And while ARIN has instructions on how to register and ASN, they’re a bit long and overly complex. Therefore, I’ve created my own set of instructions that you can use…and hopefully answer some of the questions you may have. After using this process, ARIN gave us an ASN in just a few days!
Steps on How to Register an AS Number: