Private IP Address 100.120.21.255
100.120.21.255 belongs to the private IP address space 100.64.0.0-100.127.255.255 (100.64.0.0/10).
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Not every IP address has owner information associated with it. This is the case with your lookup of 100.120.21.255 here on IPAddress.com. 100.120.21.255 falls in to one of these categories. The categories include either a internal IP address, private IP address, or reserved IP address.
All of these types of IP addressess like 100.120.21.255 have limited information available because they exist in private networks or configurations. Routers and network modems for example might use 100.120.21.255 in the default configuration. You would type 100.120.21.255 directly in your web browser to login the admin interface.
Examples of router and modem brands that might use 100.120.21.255 in their configuration include Cisco Linksys, Netgear, TP-Link, ASUS, D-Link, Netcomm, Zyxel, Edimax, Belkin, Thomson, and hundreds more.
In other times 100.120.21.255 may fall in a reserved IP range whose scope could be set aside for use in software, subnets, and private networks. Private networks exist to keep local traffic contained to a home or business, and not exposed outside of these areas.
Examples of private or reserved use include broadcast messages, local communications, service providers, testing, and future applications.
IANA IPv4 Address Space Allocation for Subnet 100.0.0.0/8
| IPv4 Address Space Prefix | 100/8 |
|---|---|
| Regional Internet Registry (RIR) | ARIN |
| Allocation Date | |
| WHOIS Server | whois.arin.net |
| RDAP Server | https://rdap.arin.net/registry, http://rdap.arin.net/registry |
| Status | ALLOCATED Delegated entirely to specific RIR (Regional Internet Registry) as indicated. |
| Notes | 100.64.0.0/10 reserved for Shared Address Space RFC6598. Complete registration details for 100.64.0.0/10 are found in IANA IPv4 Special-Purpose Address Registry. |
100.120.21.255 IP Address Representations
| CIDR Notation | 100.120.21.255/32 |
|---|---|
| Decimal Notation | 1685591551 |
| Hexadecimal Notation | 0x647815ff |
| Octal Notation | 014436012777 |
| Binary Notation | 1100100011110000001010111111111 |
| Dotted-Decimal Notation | 100.120.21.255 |
| Dotted-Hexadecimal Notation | 0x64.0x78.0x15.0xff |
| Dotted-Octal Notation | 0144.0170.025.0377 |
| Dotted-Binary Notation | 01100100.01111000.00010101.11111111 |
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