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Rhad ac am ddim Subnet / CIDR Calculator
Calculate network address, broadcast, usable host range, subnet mask, and host count from any IPv4 address and CIDR prefix.
Runs in your browserNo sign-up, no pop-upsNid oes angen mewngofnodiAm ddim am byth
/
/0/8/16/24/32
254
Usable hosts
256
Total addresses
Network address192.168.1.0/24
Usable host range192.168.1.1 β 192.168.1.254
Broadcast address192.168.1.255
Subnet mask255.255.255.0
Wildcard mask0.0.0.255
Mask (binary)11111111.11111111.11111111.00000000
IP classC
Address typePrivate (RFC 1918)
IPv4 subnetting reference. /31 and /32 are handled per RFC 3021 (point-to-point and single-host). All math runs locally in your browser.
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Sut Mae'n Gweithio
1
Ewch i mewn
Rhowch eich testun neu ddata.
2
Proses
Wedi'i brosesu ar unwaith yn eich porwr. Dim gweinydd, dim aros.
3
Lawrlwythwch
Arbedwch eich canlyniad. Nid oes dim yn cael ei storio.
Pam defnyddio ein un ni?
βCompletely free β no hidden costs, ever
βNo account, email, or login required
βRuns entirely in your browser β no uploads
βWorks on any device β phone, tablet, desktop
βOpen and ad-supported, with no tracking
βLoads fast, with no installation needed
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