/**
* @return Network
*/
public function getSpanNetwork()
{
$xorIP = IP::parseInAddr($this->getFirstIP()->inAddr() ^ $this->getLastIP()->inAddr());
preg_match('/^(0*)/', $xorIP->toBin(), $match);
$prefixLength = strlen($match[1]);
$ip = IP::parseBin(str_pad(substr($this->getFirstIP()->toBin(), 0, $prefixLength), $xorIP->getMaxPrefixLength(), '0'));
return new Network($ip, Network::prefix2netmask($prefixLength, $ip->getVersion()));
}
