Boeing claims 747-400ER is fastest commercial airplane in the sky (what about Conc ?)

[Midnight Blue]

ETOPS 773, you are probably talking about the Tu 144, the "Concordsky"
I mean the Tu 154M with 3 Engines, T-Tail able for softfield landings (as the gear looks like...)
1000+ airframes were built from 1982 to 1994.

It is going at least M .87 in normal cruise.
And as I remember it is able to cruise with more than M .90 in highspeed cruise.