public List<String> ipLookup(String ip) {
		if (Utility.isEmpty( queryStr )) {
			queryStr = "{ip}";
		}
		queryStr = queryStr.replace( "{ip}", ip );
		if (!Utility.isEmpty( url )) {
			url = url.replace( "{ip}", ip );
		}
		if (Utility.isEmpty( hostname )) {
			hostname = DEFAULT_IP_HOST;
		}
		return doQuery();
	}