What is the difference between a /24 and a /23?

A /23 fixes one bit fewer, so it holds 512 addresses: two consecutive /24 blocks. Each step down in the prefix length doubles the size of the block.

Can I buy a whole /24 of proxies?

Yes. CleanProxies sells dedicated /24 blocks of US ISP proxies as one, two or four blocks of 255 IPs each, from $1.19 per IP with unlimited bandwidth.

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What Is a /24 Subnet?

A /24 subnet is a block of 256 consecutive IPv4 addresses that share their first three numbers, for example 203.0.113.0 to 203.0.113.255. The /24 is CIDR notation: the first 24 of the address's 32 bits are fixed and the last 8 bits vary.

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how it works

How /24 subnets work

An IPv4 address has 32 bits, written as four numbers from 0 to 255. CIDR notation adds a slash and the number of fixed bits. In a /24, the first three numbers never change and the last one runs from 0 to 255, which gives 2^8 = 256 addresses. Its subnet mask is 255.255.255.0.

On an office or home network, two of those addresses are reserved: .0 names the network and .255 is the broadcast address, which leaves 254 usable hosts. Blocks announced on the internet are often used more fully, which is why proxy providers usually sell a /24 as 255 or 256 IPs.

1
/22
Subnet mask
255.255.252.0
Addresses
1,024 (four /24s)
2
/23
Subnet mask
255.255.254.0
Addresses
512 (two /24s)
3
/24
This term
Subnet mask
255.255.255.0
Addresses
256
4
/25
Subnet mask
255.255.255.128
Addresses
128
5
/26
Subnet mask
255.255.255.192
Addresses
64
6
/28
Subnet mask
255.255.255.240
Addresses
16

why it matters

Why a /24 matters for proxy users

The /24 is the smallest block most networks route on the internet, so websites and anti-abuse systems often treat it as a unit. When several IPs in the same /24 misbehave, rate limits and blocks can be applied to the whole range. That is why the neighbours on your subnet affect you on shared proxies.

CleanProxies ISP subnet proxies are dedicated /24 blocks of US carrier IPs, sold as one, two or four blocks (255, 510 or 1,020 IPs) from $1.19 per IP, with unlimited bandwidth and never shared. Read what ISP subnet proxies are for when a block beats single IPs.

/24 subnet: what it means for you

A whole /24 has no neighbours. Every address in it is yours, so nobody else's traffic can pull down the range's reputation.
One range is easy to allowlist. A partner, API or firewall can approve a single x.x.x.0/24 entry instead of hundreds of addresses.
One network, one ASN. All IPs in a /24 are announced by the same ASN, so the block behaves consistently.