Wiktionary
high hundreds
n. An unspecified number between 100 and 200 that is rather close to 200 than 100, as opposed to low hundreds and mid hundreds.
Usage examples of "high hundreds".
Although it is likely that deaths from an invasion would number in the high hundreds for U.
Heartbeat was generally in the high hundreds, blood-pressure well over two hundred and while fine motor control was reduced the fighter was acting at what most warriors considered maximum capability.