if (matcher.matches()) {
        address = matchAddress(matcher);

        /* Create a binary netmask from the number of bits specification /x */
        int cidrPart = rangeCheck(Integer.parseInt(matcher.group(5)), 0, NBITS);
        for (int j = 0; j < cidrPart; ++j) {
            netmask |= (1 << 31-j);
        }

        /* Calculate base network address */
        network = (address & netmask);

        /* Calculate broadcast address */
        broadcast = network | ~(netmask);
    } else {
        throw new IllegalArgumentException("Could not parse [" + mask + "]");
    }