"The RFC 1918 private network numbers are 10.0.0.0, Class Bs between 172.16.0.0 and 172.31.0.0 inclusive, and all Class C networks that begin with 192.168. All addresses that begin with 127 are reserved, but not as valid private IP addresses."
They are private addresses. I think Class A
192.168.0.0 | 255.255.0.0 172.16.0.0 | 255.240.0.0 10.0.0.0 | 255.0.0.0
A computer on the Internet is identified by its IP address. In order to avoid address conflicts, IP addresses are publicly registered with the Network Information Centre (NIC). Computers on private TCP/IP LANs however do not need public addresses, since they do not need to be accessed by the public. For this reason, the NIC has reserved certain addresses that will never be registered publicly. These are known as private IP addresses, and are found in the following ranges: From 10.0.0.0 to 10.255.255.255 From 172.16.0.0 to 172.31.255.255 From 192.168.0.0 to 192.168.255.255
The usual reason to use private IP addresses is when you have to share a single public IP address (or a few public IP addresses) among a larger number of computers. Nowadays, this situation is quite common - it is no longer possible to assign a public IP (version 4) address to each and every computer; IP addresses are starting to get scarce. In the scenario mentioned above, private IP addresses according to RFC 1918 are used in combination with NAT (network address translation).
ARP, or Address Resolution Protocol, defined by RFC 826.
RFC 1918 is Address Allocation for Private Internets The Internet Assigned Numbers Authority (IANA) has reserved the following three blocks of the IP address space for private internets: 10.0.0.0 - 10.255.255.255 (10/8 prefix) 172.16.0.0 - 172.31.255.255 (172.16/12 prefix) 192.168.0.0 - 192.168.255.255 (192.168/16 prefix) We will refer to the first block as "24-bit block", the second as "20-bit block", and to the third as "16-bit" block. Note that (in pre-CIDR notation) the first block is nothing but a single class A network number, while the second block is a set of 16 contiguous class B network numbers, and third block is a set of 256 contiguous class C network numbers.
When running a WHOIS query on a non-routable IP address, such as a private IP address from the reserved ranges defined in RFC 1918 (e.g., 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16), the query will typically return a response indicating that the address is not publicly routable on the internet. This is because non-routable IP addresses are meant for internal use within private networks and are not globally unique. As a result, WHOIS databases do not contain information about these addresses.
The ranges and the amount of usable IP's are as follows:10.0.0.0 - 10.255.255.255Addresses: 16,777,216172.16.0.0 - 172.31.255.255Addresses: 1,048,576192.168.0.0 - 192.168.255.255Addresses: 65,536
192.168.10.84 is a private IPv4 address commonly used in local area networks (LANs). It falls within the reserved range of private IP addresses (192.168.0.0 to 192.168.255.255) defined by RFC 1918, which means it is not routable on the public internet. Devices on the same network can communicate with each other using this address, typically assigned to devices like computers, printers, or routers. It is often used in home or small business networks for internal communication.
Any one of the following ranges, recommended by RFC 1918:10.0.0.0 - 10.255.255.255172.16.0.0 - 172.31.255.255192.168.0.0 - 192.168.255.255Any one of the following ranges, recommended by RFC 1918:10.0.0.0 - 10.255.255.255172.16.0.0 - 172.31.255.255192.168.0.0 - 192.168.255.255Any one of the following ranges, recommended by RFC 1918:10.0.0.0 - 10.255.255.255172.16.0.0 - 172.31.255.255192.168.0.0 - 192.168.255.255Any one of the following ranges, recommended by RFC 1918:10.0.0.0 - 10.255.255.255172.16.0.0 - 172.31.255.255192.168.0.0 - 192.168.255.255
An unregistered IP address is an IP address that is not officially assigned or allocated to any organization or entity by a regional Internet registry (RIR). These addresses may be used in private networks or reserved for special purposes, such as loopback or link-local communication. Since they are not registered, they cannot be routed over the public Internet, limiting their accessibility to local or private network environments. Examples include addresses in the ranges specified by RFC 1918 for private networks (e.g., 192.168.x.x).
Private addresses are used within an organization, and they are not visible to the outside. Within your local network, you should use the address ranges recommended in RFC 1918, for example, IP addresses that have "10" in the first byte (octet). An equipment with NAT enabled will translate these addresses to a single public address (or a few of them) - making it look, to the outside world, as if the information from several computers originated at the single public address.Thus, the combination of private addresses and NAT will not "provide extra external IP addresses", instead, it will save those valuable IP addresses, requiring only a single public address for a larger network. Cisco mentions, as a rule-of-thumb, a limit of about 4000 machines per public IP address.Private addresses are used within an organization, and they are not visible to the outside. Within your local network, you should use the address ranges recommended in RFC 1918, for example, IP addresses that have "10" in the first byte (octet). An equipment with NAT enabled will translate these addresses to a single public address (or a few of them) - making it look, to the outside world, as if the information from several computers originated at the single public address.Thus, the combination of private addresses and NAT will not "provide extra external IP addresses", instead, it will save those valuable IP addresses, requiring only a single public address for a larger network. Cisco mentions, as a rule-of-thumb, a limit of about 4000 machines per public IP address.Private addresses are used within an organization, and they are not visible to the outside. Within your local network, you should use the address ranges recommended in RFC 1918, for example, IP addresses that have "10" in the first byte (octet). An equipment with NAT enabled will translate these addresses to a single public address (or a few of them) - making it look, to the outside world, as if the information from several computers originated at the single public address.Thus, the combination of private addresses and NAT will not "provide extra external IP addresses", instead, it will save those valuable IP addresses, requiring only a single public address for a larger network. Cisco mentions, as a rule-of-thumb, a limit of about 4000 machines per public IP address.Private addresses are used within an organization, and they are not visible to the outside. Within your local network, you should use the address ranges recommended in RFC 1918, for example, IP addresses that have "10" in the first byte (octet). An equipment with NAT enabled will translate these addresses to a single public address (or a few of them) - making it look, to the outside world, as if the information from several computers originated at the single public address.Thus, the combination of private addresses and NAT will not "provide extra external IP addresses", instead, it will save those valuable IP addresses, requiring only a single public address for a larger network. Cisco mentions, as a rule-of-thumb, a limit of about 4000 machines per public IP address.