acf_: both are in the mix
at least i think level3 is still in the mix
actually i think you're right. a  lot of routes go over ntt though.
yeah, even traceroute to www.level3.net goes via ntt
and of course https://bgp.he.net/AS25795
kinda sad to see level3 replaced with the most asshole transit provider :P
i use 4.2.2.2 as a standard level3 address
some providers like to put their main web page on a cdn