홈
Tom Utilities

IPv4 서브넷 계산기

개발자 유틸리티

모든 IPv4 CIDR 블록의 네트워크, 브로드캐스트, 마스크, 와일드카드, 사용 가능 호스트 범위를 계산합니다.

사용 방법

Calculate a subnet

Enter an address with a prefix such as 192.168.1.0/24. The tool computes every key value for that block.

  1. Enter an IPv4 address or CIDR block.
  2. Read the network and broadcast addresses.
  3. Copy the JSON result for scripting.

Usable hosts

For prefixes from /1 to /30 the first and last addresses are reserved, so usable hosts equal the total minus two. /31 and /32 are treated as point-to-point and single-host ranges.

자주 묻는 질문

What is a wildcard mask?

A wildcard mask is the bitwise inverse of the subnet mask. It is commonly used in access control lists.

How do I know if an address is private?

The tool flags 10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16 as private networks.