public static boolean isBetween(String ip, String low, String high) {
		boolean result = false;
		long nip = IPString2Number(ip);
		long nlow = IPString2Number(low);
		long nhigh = IPString2Number(high);
		if (nip > -1 && nlow > -1 && nhigh > -1) {
			result = (nip >= nlow && nip <= nhigh);
		}
		return result;
	}