What do the last 2 digits of my public ip address mean?

[jakeslayer9091]

Hello, I've recently moved into an apartment complex, and the internet sucks, under 25mb/s download when they advertised "High speed internet", Now I don't know anything about networks but I wanted to investigate and check if they are using the same internet package for all the apartments. (Each apartment has its own router). and after connecting to two in different areas, I got the same IP on both of them except that the last 2 digits were different. (Check examples), What does this mean? Are all apartments on the same IP meaning if someone is dumb enough to get DDoSed, everyone else will be affected?

 

Router 1: 10.255.255.6

Router 2: 10.255.255.87

These are just examples and not my real IP. (the last 2 bolded digits are though)

Once again, I know nothing about networks.

 

 

[mariushm]

They mean absolutely nothing. They don't affect your speed.

[Enderman]

It's literally just an address.

Like it doesn't make a difference if your house number is 2567 or 2569 or 2678, it's just a number.

[LIGISTX]

47 minutes ago, jakeslayer9091 said:

Hello, I've recently moved into an apartment complex, and the internet sucks, under 25mb/s download when they advertised "High speed internet", Now I don't know anything about networks but I wanted to investigate and check if they are using the same internet package for all the apartments. (Each apartment has its own router). and after connecting to two in different areas, I got the same IP on both of them except that the last 2 digits were different. (Check examples), What does this mean? Are all apartments on the same IP meaning if someone is dumb enough to get DDoSed, everyone else will be affected?

 

Router 1: 10.255.255.6

Router 2: 10.255.255.87

These are just examples and not my real IP. (the last 2 bolded digits are though)

Once again, I know nothing about networks.

 

 

https://en.wikipedia.org/wiki/IPv4

 

If you want to actually understand, read up on it on wikipedia, and then possibly continue googling things to help explain it. Its not difficult, but your not really going to understand it unless you go and learn it.

 

Short answer, your ISP has ISP blocks to assign out to modems, your apt complex is going to be using a single ISP so all of them are going to likely have the same first 1 or 2 octets. But every address is a different address, so no, if someone in the complex is getting DDOSed, your not ALSO getting DDOSed. That said..... if someone is actually get DDOSed, if your ISP is garbage and can't protect against the/load balance, it is possible the lines coming into the complex are getting hammered, and effectively, you would also be getting DDOSed.... unlikely tho.

 

Again, best bet is to read up on it, itll make a lot more sense and help you ask better questions as well

[brwainer]

1 hour ago, jakeslayer9091 said:

Are all apartments on the same IP meaning if someone is dumb enough to get DDoSed, everyone else will be affected?

You may or may not have “every apartment on the same IP” as it varies by provider. There are many small providers that service only the MDU market and don’t operate like the big traditional ISPs, most importantly they probably don’t have enough public IPs for every apartment. If you’re getting a private IP (10.x.x.x, 172.16.x.x - 172.24.x.x, 192.168.x.x) or CGNAT IP (100.64.x.x - 100.127.x.x) then your ISP is sharing public IPs between multiple users. If you aren’t sure, you can share the first half of the IP you are actually getting.

 

What may be more important in a DOS/DDOS attack is that the whole apartment complex is unlikely to have more than 1Gb/s for everyone to share - might even be lower like 250Mb/s. This would mean that even if you have your own public IP, the total connection coming in to the complex may be saturated by a relatively small attack.