/8 vs /24 — Subnet Comparison
A /8 subnet is 65,536× larger than a /24. Every additional bit in the prefix halves the address space — the 16-bit difference between these two means /8 has 216 = 65,536 times as many addresses.
16 million IPs — Class A network
Typical Uses
- →Entire Class A private range (10.0.0.0/8)
- →Large ISP or carrier allocations
- →Enterprise-wide addressing plan
254 usable hosts — the industry standard
Typical Uses
- →Home and SOHO LAN (192.168.1.0/24)
- →Standard office VLAN
- →AWS/Azure subnet per AZ
Key Differences
FAQ
What is the difference between /8 and /24?
A /8 has 16,777,214 usable hosts
and a /24 has 254.
The subnet masks differ: /8 uses 255.0.0.0
while /24 uses 255.255.255.0.
Every additional bit in the prefix halves the number of addresses — so the 16-bit gap means
/8 is exactly 65,536× larger.
How many /24 subnets fit in a /8?
Exactly 65,536 /24 subnets fit perfectly inside one /8 with no wasted space. To split a /8 into /24s, just increment the last 16 bits of the network address for each new subnet.
Which should I choose?
/8 is typically used for: Entire private Class A or ISP allocation. /24 is better for: Standard subnet — home, office, cloud. Choose the smallest prefix that comfortably fits your host count — over-allocating wastes address space, but under-allocating means painful renumbering later.