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What is the valid range of a Class A network address

Author

Joseph Russell

Updated on March 24, 2026

The Class A range is 0-127 in the first byte. Only 1-126 can be used to identify Class A networks because 0 and 127 are reserved. To find the valid host addresses in a Class A network, you must find the network and broadcast address in the IP range.

What is the range for a Class A address?

ClassRangeNetwork AddressA0-127xxxB128-191xxx . xxxC192-223xxx . xxx . xxx

What is network address range?

Network address–An IP address with a host portion that is all zeros. Octet–An 8-bit number, 4 of which comprise a 32-bit IP address. They have a range of 00000000-11111111 that correspond to the decimal values 0-255.

What is class A network range?

Class A Public & Private IP Address Range Class A addresses are for networks with large number of total hosts. Class A allows for 126 networks by using the first octet for the network ID. The first bit in this octet, is always zero. The remaining seven bits in this octet complete the network ID.

What is the range prefix of Class A?

Class A networks use a default subnet mask of 255.0. 0.0 and have 0-127 as their first octet.

What is the valid range used for a class C private IP address?

Class C: 192.168. 0.0 to 192.168. 255.255.

What is the address range of Class B network address in binary?

The range of a Class B network address is 128-191 . This makes our binary range 10xxxxxx .

What are the different classes of IP addresses and give the range of each class?

ClassAddress rangeClass A1.0.0.1 to 126.255.255.254Class B128.1.0.1 to 191.255.255.254Class C192.0.1.1 to 223.255.254.254Class D224.0.0.0 to 239.255.255.255

What is range of private IP address?

Public IP addressPrivate IP addressNot freeFreeAny number not included in the reserved private IP address range Example: 8.8.8.8.10.0.0.0 — 10.255.255.255; 172.16.0.0 — 172.31.255.255; 192.168.0.0 — 192.168.255.255 Example: 10.11.12.13

What is a Class A network used for?

Class A IP addresses are used for huge networks, like those deployed by Internet Service Providers (ISPs). Class A IP addresses support up to 16 million hosts (hosts are devices that connect to a network (computers, servers, switches, routers, printers…etc.)

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How do you write an IP range?

Technical explanation. CIDR notation is written as the IP address, a slash, and the CIDR affix (for example, the IPv4 ” 10.2. 3.41/24 ” or IPv6 ” a3:b:c1:d:e:f:1:21/24 “). The CIDR affix is the number of starting digits every IP address in the range have in common when written in binary.

What are the three ranges of private IP addresses?

  • 10.0. 0.0 – 10.255. 255.255.
  • 172.16. 0.0 – 172.31. 255.255.
  • 192.168. 0.0 – 192.168. 255.255.

Which is a valid IP address?

A valid IP address must be in the form of A.B.C.D, where A,B,C and D are numbers from 0-255. The numbers cannot be 0 prefixed unless they are 0.

What is the prefix for a Class A address?

class A addresses: a.0.0.0, or aclass B addresses: a.b.0.0, or a.bclass C addresses: a.b.c.0, or a.b.cnetmask = 255.0.0.0netmask = 255.255.0.0netmask = 255.255.255.0prefix length = 8prefix length = 16prefix length = 24

Is 255.255 255.255 IP address valid?

No, it is not possible to have any source 255.255. 255.255 as IP Address because this IP Address is already reserved for the broadcast address.

Is 127 Class A or Class B?

The numbers 0 and 127 are reserved and cannot be used as network addresses. Any address that starts with a value between 1 and 126 in the first octet is a Class A address. Class B address space was designed to support the needs of moderate to large size networks with more than 65,000 hosts.

What is the address range of a Class A network address in binary *?

Class A Addresses. If the first bit of the first octet of an IP address is a binary 0, the address is a Class A address. With that first bit being a 0, the lowest number that can be represented is 00000000, decimal 0. The highest number that can be represented is 01111111, decimal 127.

What is the address range of Class C network address in binary?

In a Class C network, the first two bits are set to 1, and the third bit is set to 0. That makes the first 24 bits of the address the network address and the remainder as the host address. Class C network addresses range from 192.0. 0.0 to 223.255.

What is the subnetwork number of a host with an IP address of 172.16 66.0 21?

A.172.16.112.0B.172.16.0.0C.172.16.96.0D.172.16.255.0

Which is the Class C private IP address range quizlet?

The Class C private range is 192.168. 0.0 through 192.168. 255.255.

What is a Class C IP address?

A Class C address consists of a 24-bit network address and an 8-bit local host address. The first three bits in the network address indicate the network class, leaving 21 bits for the actual network address. … In other words, the first octet of a Class C address is in the range 192 to 223.

What are Class C IP addresses used for?

ClassPurposeAThese are designed to be used in very large companies like Google.BThese are designed to be used in medium-sized companiesCThey designed to be used in small-sized companies.DThey are not used in the public sector, instead being reserved for multicast addressing

How do IP ranges work?

IP addresses are expressed as a set of four numbers — an example address might be 192.158. 1.38. Each number in the set can range from 0 to 255. So, the full IP addressing range goes from 0.0.

How do I know if my IP is Class AB or C?

  1. If it begins with 0, then it’s a Class A network.
  2. If it begins with 10, then it’s a Class B network.
  3. If it begins with 110, then it’s a Class C network.
  4. If it begins with 1110, then it’s a Class D network.
  5. If it begins with 1111, then it’s a Class E network.

What kind of networks use a Class A or Class B or Class C IP address typically?

What kind of networks use a Class A or Class B or Class C IP address typically? Class A IP address is used for a network with large number of hosts. Class C IP address is used for a network with less number of hosts. Class B IP address is used for a network with medium number of hosts.

How do I find my network IP address range?

  1. Click the Start menu.
  2. In Search/Run bar, type cmd or command, then press Enter. …
  3. In the Command Prompt, type ipconfig or ipconfig/all, then press Enter. …
  4. Using the available IP range determined by your router, run a ping command to an address in that range to confirm it is free for use.

How do you know if an IP address is valid or invalid?

An IP address is considered valid or invalid based on the subnet mask of the network. A network contains a network ID, the usable(host) IP range and a broadcast ID. The Network ID and Broadcast ID cannot be used and this network ID and Broadcast IDs are determined by its subnet mask.

Is 255 a valid IP address?

A standard Class C network consists of 256 addresses (0 to 255 inclusive), of which one is the network address (. 0) and the other is the network broadcast address (. 255). Valid (or usuable) ip addresses would be 192.168.

Is 0.0 0.0 is a valid IP?

Even though 0.0. 0.0 has several uses on computer networks, it is not a general-purpose device address. … Although 0.0. 0.0 is valid address syntax, a client device using it as a source IP address cannot communicate on a network.

What is network address prefix?

A network prefix is an aggregation of IP addresses. … The bitmask or prefix length defines the size of the aggregation. It effectively defines the amount of bits that determine the aggregation itself. For example, 192.50. 128.0/17 defines the first 17 bits of the IP address to identify the address aggregation.

What is my network prefix?

In IPv4, the prefix (or network portion) of the address can be identified by a dotted-decimal netmask, commonly referred to as a subnet mask. For example, 255.255. 255.0 indicates that the network portion, or prefix length, of the IPv4 address is the leftmost 24 bits. The 255.255.