in src/main/java/software/amazon/msk/auth/iam/internals/utils/RegionUtils.java [15:20]
public static Region extractRegionFromHost(String host) {
return Region.regions().stream()
.filter(region -> host.contains(region.id()))
.findFirst()
.orElseGet(() -> DefaultAwsRegionProviderChain.builder().build().getRegion());
}