# How do I find the highest IP address?

The highest numerical IPv4 multicast address would be 239.255. 255.255. The highest numerical IPv4 address overall is 255.255. 255.255, but that is reserved for local subnet broadcasting.

You asked, how do I find the maximum number of IP addresses? Out of this addresses the first and last address correspond to network and broadcast address which cannot be used for host. i.e 2048-2 = 2046 are the maximum number of host the given range of IP address can have.

Beside above, why is 255 the MAX IP? 255.255. The reason each number can only reach up to 255 is that each of the numbers is really an eight digit binary number (sometimes called an octet). In an octet, the number zero would be 00000000, while the number 255 would be 11111111, the maximum number the octet can reach.

People ask also, can you have 255 in an IP address? Yes, an IPv4 address can end in 255 without being a broadcast address. For it to be a broadcast address, all bits in the host part need to be ones. In your example, the 32-17 = 15 rightmost bits need to be all ones, not only the rightmost eight. For example, 10.0.

Also, is 255.255 255.255 IP address valid? In general, using 255.255. 255.255 is a bad idea, as there are several setups where the interface with the default route is exactly the wrong choice. Selecting an interface explicitly is better, but needs to be done carefully.

## Are there a limited number of IP addresses?

There are only about 4.3 billion possible IPv4 addresses, which engineers assumed would be more than enough in the 1990s. With IPv6, there are about 340 trillion trillion trillion combinations — specifically: 340,282,366,920,938,463,463,374,607,431,768,211,456.

## How many IPs are in a subnet?

Essentially, a subnet is a smaller portion of the network within class A, B, or C. Creating and using subnets can help to keep your network organized and functional. Each IP address block can create 254 IP addresses, which allows 254 x 4 total IP addresses to be created for use in the network.

## How do you find the maximum number of hosts?

To find the maximum number of hosts, look at the number of binary bits in the host number above. The easiest way to do this is to subtract the netmask length from 32 (number of bits in an IPv4 address). This gives you the number of host bits in the address.

## How can I use more than 254 IP address?

If more than 254 IP addresses are needed on a network then multiple subnets should be used with routers and maybe VLANs. You could spilt different departments or building on different subnets.

## Why IP address is not 256?

Because each of the elements (a.b.c.d where a, b, c and d are elements) is 8 bits, and 256 takes 9 bits to store this value (in 8 bits, 256 is the same as zero, it’s like in old cars, when the car has done 100000 miles/kilometers, it says “00000” on the odometer).

## How do I increase my IP range?

1. Configure the interface of each connected router and change the IP address for the connected interface, its subnet address, and its subnet mask.
2. Delete your current DHCP scope.
3. Create a new DHCP scope with the new subnet mask.

## Is 0.0 0.0 is a valid IP?

0.0 as a reserved, special-purpose address for “this host, this network.” Its IPv6 equivalent is expressed as ::/0. Although 0.0. 0.0 is valid address syntax, a client device using it as a source IP address cannot communicate on a network. IPv4 address numbers start with 0.0.

## Can I use IP 254?

1.254 is a private IP address and is one of a block of addresses reserved for private networks. This means that a device in this private network cannot be accessed directly from the internet using this private IP. However, any device on the private network can connect to the other devices on that network.

## What IP addresses are in a range?

1. Class A: 10.0. 0.0 to 10.255. 255.255.
2. Class B: 172.16. 0.0 to 172.31. 255.255.
3. Class C: 192.168. 0.0 to 192.168. 255.255.

## What is CIDR notation?

A system called Classless Inter-Domain Routing, or CIDR, was developed as an alternative to traditional subnetting. The idea is that you can add a specification in the IP address itself as to the number of significant bits that make up the routing or networking portion.

## What does a subnet mask of 255.255 255.0 mean?

A subnet mask of 255.255. 255.0 allows for close to 256 unique hosts within the network (since not all 256 IP addresses can be used). If your computer is connected to a network, you can view the network’s subnet mask number in the Network control panel (Windows) or System Preference (macOS).

## How many IPS are there?

If you don’t know, there are a total of 4,294,967,296 possible IP addresses in IPv4.

## How many public IPS are left?

IP addressing Internet Protocol version 4 provides 232 (4,294,967,296) addresses. However, large blocks of IPv4 addresses are reserved for special uses and are unavailable for public allocation.

## How many IPS is a 26?

A “/26” network provides 64 IPv4 addresses.