This looking glass is here as a courtesy and it is intended for human use only. Do not direct your automated tool here, all you'll gain is a DROP rule in iptables, or a null route at Seabone's edge if you insist.
As the ICMP traffic is handled on routers with low-priority, this tool has not to be intended for use in measuring SLAs. This tool should only be used to verify reachability.
All ping and traceroutes towards Sprint originating on a router where Sprint is directly connected will not work because Sprint does not redistribute the point-to-point addresses in their routing. It's their policy and there is no point in complaining. Please use a different origin router and everything will just work.
GRX routers are down to the bottom of the list.