List of IP Addresses: 123.*.*.* (123.0.*.* - 123.255.*.*)

This is the list of IP addresses where the first byte is 123, the second byte is between 0 - 255, and the third and fourth bytes can be changed (the asterisk below), expressed as 123.*.*.* ( -

This IP address list contains 256 * 256 * 256 = 16,777,216 IP addresses. Let’s take one of the IP addresses as an example to describe the properties of this IP:

First IP Address Example

But this is just an example of one of the IP addresses. It does not mean that all IP addresses in this list have the same properties. If you need to know other IPs and more detailed IP address information, please click title link.

IPv4: 123 Network Class, Net ID, Host ID Description of IP Address in Binary, Decimal and Hexadecimal Description of IP Address Class A/B/C/D/E and Network ID, Host ID


1. First IP Address Example

IP:123 Icon / Image Meaning Table is a public IP address, the user is located at Chiyoda City, Tokyo, Japan, its purpose is Fixed Line ISP, and the type is Broadband/Cable/Fiber. More details:

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2. List of Class A IP Addresses

Class A IP address means: in the four-part number of the IP address (for example: byte 1.byte 2.byte 3.byte 4), the first part number (byte 1) is the network number, the remaining three part numbers (byte 2.byte 3.byte 4) are the number of the local computer.

If the IP address is expressed in binary, the class A IP address consists of a 1-byte network address and a 3-byte host address, and the highest bit of the network address must be '0'.

Class A IP address range: ~, available IP address range: ~

The length of the network identifier in the class A IP address is 7 bits, and the length of the host identifier is 24 bits. The number of class A network addresses is relatively small (2 ^ 7 - 2 = 126), which can be used for more than 160 millions hosts of large networks (2 ^ 24 - 2 = 16,777,214).

If you need to know more about the class A IP address parts, you can click the title link in the list of Class A IP addresses.


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3. Last IP Address Example

IP: Icon / Image Meaning Table is a public IP address, the user is located at Hyderabad, Telangana, India, its purpose is Commercial, and the type is Company/T1. More details:

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