# Question: What Is The Maximum Number Of IP Addresses?

## How long does IP address last?

roughly 7 daysWhen your router receives a non-static DHCP assigned IP address from your ISP there is a pre-defined time limit built into the assignment, this time limit is called a DHCP Lease.

The typical lease time for ISP’s in the United States is roughly 7 days..

## How do you calculate the number of subnets?

Total number of subnets: Using the subnet mask 255.255. 255.248, number value 248 (11111000) indicates that 5 bits are used to identify the subnet. To find the total number of subnets available simply raise 2 to the power of 5 (2^5) and you will find that the result is 32 subnets.

## How many usable IP addresses in a 24?

CIDR, Subnet Masks, and Usable IP Addresses Quick Reference Guide (Cheat Sheet)CIDRSubnet MaskTotal IPs/27255.255.255.22432/26255.255.255.19264/25255.255.255.128128/24255.255.255.025629 more rows•Aug 26, 2011

## Can you run out of IP?

The Internet is running out of room. Experts predict that in two or three years we will run out of Web addresses, so-called IP addresses, that can be assigned to new Internet-based sites and services. Each site is assigned a unique number based on the IPv4 standard.

## Can the Internet run out of space?

No, the internet is a network interconnected computer networks. It can’t really run out of space. … Each computer has to have an address on the network, and if the number of addresses is limited then it could run out of address space. Most of the networks have switched over to IPv6, since IPv4 ran out of free addresses.

## Can two computers have the same IP address?

Answer: If you access the Internet from a local network (LAN) in your home or business, it is possible that you share an IP address with other users. This is because, while you might use different computers or devices, you all use the same Internet connection. … Typical IP addresses of local devices might be 10.0.

## What is the maximum number of IP addresses that are allocated to a single 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.

## Why do IP addresses exist?

IP stands for Internet Protocol. An Internet Protocol address, or IP address is a unique identifier given to every machine in a network. … Because an IP address is a unique identifier, it allows computers to send and receive information to and from specific computers in a given network.

## What is a 255.255 255.0 subnet?

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). … This is the default subnet mask used by Class B networks and provides up to 65,536 IP addresses (256 x 256). The largest Class A networks use a subnet mask of 255.0.

## What is the maximum number of hosts in a 19 subnet?

IPv6 Subnet CalculatorPrefix sizeNetwork maskUsable hosts per subnet/18255.255.192.016,382/19255.255.224.08,190/20255.255.240.04,094/21255.255.248.02,04631 more rows

## What is a 16 subnet?

The number 16 is the first subnet and also your block size. … The valid subnets in this example are 16, 32, 48, 64, 80, 96, 112, 128, 144, 160, 176, 192, 208, 224. As another example, if you had a Class A subnet mask of 255.255. 240.0, you’d use the mask on the second and third octets minus 256.

## How many IP addresses can there be?

Both IPv4 and IPv6 addresses come from finite pools of numbers. For IPv4, this pool is 32-bits (232) in size and contains 4,294,967,296 IPv4 addresses. The IPv6 address space is 128-bits (2128) in size, containing 340,282,366,920,938,463,463,374,607,431,768,211,456 IPv6 addresses.

## How many subnets are in a 24?

Deducting 248 from 256 gives us 8 so the subnets are 0, 8, 16, 24, 32, 40, 48… 240,248.

## How many 24 subnets are in a 22?

252.0, which is why you enter that as the subnet mask on your computers. If you have 4 /24 subnets, and need to combine them then a /22 would do it.

## Are there enough 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.

## Can 2 phones have the same IP address?

yes. scenario- both cell phones are connected to same wifi router. in case of cellular data connection then they will have separate IP.