If one of the two ASNs has a Looking Glass is the only way I can think of, although someone else may have an idea. Maybe a traceroute between the two?
this post was submitted on 23 Aug 2023
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Thank you, will make a list of Looking Glasses for some ASes and link them in our internal Netbox. Good idea! I already found two of the involved ones :)
Maybe a traceroute between the two?
A good idea in principle, but in my case it's usually our ISP's AS and the customer ISP's AS. I would prefer not to involve the customer to save time and effort.