With T206954 being (partially) implemented, scripts and tools making use of wgRelevantUserName for IP ranges may need to be wary of ranges larger than the CIDR limit, so is there a way to determine if a given range is larger than the limit, or should users be rolling their own?

It'd be useful, especially since, as far as I can tell, the definitions in $wgBlockCIDRLimit aren't available from the API (meta=siteinfo is what I expected?), so those values would have to be looked up and hardcoded ahead of time.