All of our IP addresses can be seen here: https://bgpview.io/asn/6871#prefixes-v4
Short answer is that if it's not on that list, it won't work as that's what's configured in BGP and our access lists.
To compare, these are Zen's: https://bgpview.io/asn/13037#prefixes-v4
Dave Tomlinson
Enterprise Architect - Network & OSS
Plusnet Technology
