🔢 IPv4 CIDR Calculator
CIDR
Wildcard Mask
Decimal IP
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IP / CIDR
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10.0.0.0/8
172.16.0.0/12
192.168.1.0/24
/28
/30
0.0.0.0/0
/32
🎚️ Prefix Slider (/0 – /32)
/24
−
/0
/32
+
0
4
8
12
16
20
24
28
32
Subnet Mask
255.255.255.0
Wildcard Mask
0.0.0.255
Total Hosts
256
Usable Hosts
254
Drag to preview a mask, or enter an IP above and drag to recalculate that network live.
Subnet Mask
or CIDR Prefix
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Dotted Decimal IP
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Decimal IP (0 – 4,294,967,295)
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