AWS Adds Regional Origin Signal to Direct Connect Routes via BYOASN

AWS has published a walkthrough of Bring Your Own ASN (BYOASN), a feature of Amazon VPC IP Address Manager that lets providers attach a distinct public ASN to each AWS Region. The approach addresses cases like a Zurich customer whose Direct Connect circuit at ZUR1 receives routes from the Frankfurt Region, which falls under a different regulatory jurisdiction. Because the Region-specific ASN appears as the origin AS in the BGP path, customers can write a single import policy scoped to approved origins instead of maintaining fragile prefix lists. The setup requires an IPAM with public scope, a registered BYOIP range, a public ASN with a valid ROA, and a public virtual interface peering with ASN 7224. The post was published on 3 November 2026.