Ooops - I already sent an email to SkyVision asking about their address.
*edit*
239.255.255.250
That's not an internet address - it's a broadcast address, or more strictly a multicast address, on the local domain.
Absolutely normal and expected.
lol - 239.255.255.250
I've never seen Hikvision camera with malware on - hacked or not. I've seen alot of different models, firmware versions etc and done traffic analysis. It doesn't really make sense for the hackers or the sellers to do that as it will just stop people using the product.
Hikvision putting malware/backdoors in? There isn't much room to hide it when reverse engineering and it will show up on traffic capture if ever used. I think this is extremely unlikely though if you are safeguarding a nuclear reactor then by all means put them in a non routable network segment.
Given these devices are security products, it seems a great way to kill a multi billion dollar international business to do something so stupid and easily discoverable.
For the average home user likely setting a fake gateway IP on the camera to prevent Internet access would probably be enough if they are concerned.
I'm not saying blindly trust manufacturers in China (or anywhere) and caution is hardly ever a bad idea, but it is better at a measured and proportionate level.