IPMask – Subnet Calculator
IPv4 networks, masks and hosts
Free · Designed for iPad. Not verified for macOS.
IPMask works out an IPv4 network from an address and a mask: network and broadcast address, first and last host, number of hosts, netmask and wildcard.
• Type the address the way you have it: 192.168.1.1, 192.168.1.1/22 or with a dotted mask.
• Move the mask slider and watch the 32 bits split into the network part and the host part.
• See the address type at a glance: private, public, loopback, link-local, multicast.
• Switch to the binary view to see the address, netmask and network bit by bit.
• Copy the whole result as text or share it.
• On Apple Watch: enter an address with a keypad, turn the Digital Crown to set the prefix and read the result on your wrist.
/31 point-to-point links (RFC 3021) and /32 host routes are handled correctly.
Made for network engineers, students and anyone who sets up a router at home. The app works offline; it needs a connection only for the small ad banner.
Ratings & Reviews
IPMask is back on Apple Watch.
• Enter an address with the keypad and turn the Digital Crown to set the prefix.
• Network, broadcast, first and last host, hosts, netmask and wildcard on your wrist, with the 32-bit bar.
• Works without the iPhone nearby.
The developer, Aleksei Neronov, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Aleksei Neronov
- Size
- 5.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
English and 21 more
- English, Danish, Dutch, Finnish, French, German, Greek, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Vietnamese
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © 2015-2026 Aleksei Neronov