code: public static String extractApproximateZone(String host) {
  		String[] split = StringUtils.split(host, ".");
  		return split == null ? host : split[1];
  	}
docs: Approximates Eureka zones from a host name. This method approximates the zone to be
  everything after the first "." in the host name.
  @param host The host name to extract the host name from
  @return The approximate zone