It's a mixed bag. I try to avoid things like "The fathers say..." because a) it is a Eastern Orthodox method and b) the fathers usually don't speak uniformly on complex doctrine early on.
St Irenaeus and Justin Martyr were definitely premil. They acknowledge, however, that there are other views. That right there means there is no uniformity. Scholars have said Methodius of Olympus and St Cyril of Jerusalem (not Alexandria) were premil. I'm not so sure. They all have exciting views of the Tribulation (and they all believe in a definite Tribulation period) but they don't have any clear millennial frameworks.
In the West Augustine dominated and few would challenge that paradigm. In the East eschatology was more along the lines of a) condemning Origen's apakastasis and b) condemning the vaguely-defined Chiliasts.
Now to throw a few monkey wrenches into everything.
1. Regardless of where they landed on millennial frameworks, they all held to a mutation of futurist/historist interpretation.
2. British monks made many historicistic prophecies about the end times (some of which have been fulfilled).
In other words, this might be "amillennialism," but it's not the academic tenured respectable amillennialism. St Cyril of Jerusalem said we will fight Antichrist in his person.