1) this isn't a public IP
2) this isn't an IP at all, in fact
Not sure why it was posted, but it isn't going to cause someone to get hacked.
caroline, you have got a firewall, haven't you? If not, that's one issue that needs looking at, if you have, I hope you've got your UBR and DHCP IPs allowed through, or there may be problems come lease expiry time.