Update Log
2023.10.14: Online IP Address/Subnet Mask Calculation and Conversion Tool has been launched
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Online IP Address/Subnet Mask Calculation and Conversion Tool

This is a tool that can calculate and convert IP addresses and subnet masks online, providing common network calculation functions such as IP address conversion, subnet mask calculation, the number of usable addresses, and hexadecimal and decimal website conversion. It is very convenient and practical, and is provided free of charge to those in need.

Network and IP Address Calculator

Display the network, broadcast, first, and last addresses for the given network:
IP/Mask Bits: /
Results:
Usable Addresses:
Mask:
Network:
The Chinese characters in the provided code are translated into English, while the rest of the code remains unchanged: First available:
Last available:
Broadcast:
In the network mask "bit format" is also known as CIDR format (CIDR=Classless Inter-Domain Routing).

IP Address and Network Converter

Subnet Mask Converter (Binary to Decimal Format)
Result: /

Subnet Mask Converter (Decimal to Binary Format)

/
Result:
Decimal:
Hexadecimal:

Address Mask Converter for Required Quantity

Number of Addresses Needed:
Result:
Mask: / Dotted Decimal Mask:
Number of Available Addresses:

Convert Dotted Decimal IP Address and Mask to Binary and Hexadecimal

Result:
Binary:
Hexadecimal:

Hexadecimal Mask Conversion to Dotted Decimal IP Address

Result:
Dotted Decimal:
Bin Binary:

Calculate the Bitwise Complement of an IP Address (Inverse)

Result:

Mask Conversion to Number of Usable Network Addresses

Mask: /
Result:
Number of Usable Addresses: Total Number of Addresses:
Dotted Decimal Format:
IP Multicast Address Range
All multicast addresses can be easily recognized because they start with the same bit pattern "111".
224... - 224...255 Well-known multicast addresses, control channels
224..1. - 238.255.255.255 Global scope (Internet-wide) multicast addresses
239... - 239.255.255.255 Local scope multicast addresses

Subnet Mask Calculator

Enter TCP/IP Address:
Select Network Type: Default Class A Network Class B Network Class C Network  
Select the Number of IPs in the Subnet:  
Or select the required
node/host count (including broadcast address):
Network Type:
Subnet Mask: or
Subnet:
Number of Nodes/Hosts per Network
(including network and broadcast addresses)***: 		 

Network/Node Calculator

Enter Subnet Mask:
Enter TCP/IP Address:
Network:
Node/Host:
Broadcast Address:

IP Address Converter

Enter decimal TCP/IP address in dot notation:
Or enter binary TCP/IP address:
Or enter hexadecimal TCP/IP address:
Or enter decimal TCP/IP address:

Subnet Mask Calculator

Enter decimal subnet mask in dot notation:
Or enter the number of bits for the subnet mask: /

Subnet Mask Inverter

Please enter the decimal subnet mask in dot format: