IP Subnets (/24) and Running Multiple Accounts

What a subnet is

An IPv4 address has four numbers, such as 203.0.113.25. A subnet splits the address space into contiguous blocks, written with a slash and the number of fixed bits. A /24 fixes the first three numbers, so every 203.0.113.x address is in the same /24. A /16 fixes only two and is 256 times larger. The basics are in what an IPv4 address is.

In practice a /24 is the smallest block normally announced on the internet through BGP, so it is often seen as one owner's chunk of infrastructure.

Why IPs in one subnet can be linked

On the other hand, plenty of genuine users share a subnet every day, such as staff in one office or customers of one provider. Platforms therefore do not restrict accounts for this alone; they weigh it with everything else.

• Shared owner: neighbouring IPs usually belong to the same company and ASN, so they look like one source. See what an ASN is.
• Block-level scoring: when one IP in a range is flagged for abuse, fraud systems may raise suspicion for the whole range.
• Login patterns: dozens of accounts created on the same day from .10, .11, .12 form an obvious pattern.
• Combined signals: a shared subnet plus a shared browser fingerprint or payment method makes linking far more likely.

How to check how many subnets your proxies cover

With a list in ip:port:user:pass format saved as proxies.txt, run this on Linux or macOS to count IPs per /24:

• cut -d: -f1 proxies.txt | cut -d. -f1-3 | sort | uniq -c | sort -rn
• Each line shows a count and the first three numbers, so 12 203.0.113 means 12 IPs in 203.0.113.0/24.
• On Windows, open the file in Excel, split columns on colons and dots, then count by the first three columns with a PivotTable.
• To see who owns a range, look up any IP in it with the IP lookup tool.

How to allocate IPs across accounts

The goal is not concealment. It is to stop genuinely separate accounts from looking like one block because of careless setup.

• One dedicated, fixed IP per account matters more than subnets. See whether to rotate or keep IPs for accounts.
• Prioritise valuable accounts: if your IPs span several subnets, put the most important accounts in different ones; secondary accounts can share.
• Avoid sequential assignment: do not give .10 to account 1 and .11 to account 2 and set them all up at once. Mix the order and spread setup over time.
• Separate by purpose: keep scraping IPs apart from login IPs, since scraping behaviour can affect a range's reputation.
• Keep records of account, IP, subnet and assignment date so you can see the blast radius of any problem.
• Separate fingerprints: one antidetect profile per account with a time zone matching the IP. The full process is in the multi-account setup checklist.

Buying proxies for many accounts

Bulk orders are usually drawn from a number of the provider's ranges. Run the count above as soon as you receive the list, and if your plan needs a wider spread of subnets, ask support by ticket before placing a large order.

At VinaProxy, each IP goes to one customer and stays the same for the rental period, so you can plan allocation once and keep it. Private IPv4 is available in seven countries, such as Vietnam and the United States; for high-value accounts consider static ISP in Vietnam or the US. How many proxies you need helps with sizing.

No subnet strategy makes accounts immune

Good allocation removes one technical link. Platforms still look at sign-up details, payments, phone numbers, content and behaviour, and many limit accounts per person or ban fake accounts in their terms. Read and follow those rules. Proxies help legitimate accounts, such as the client accounts an agency manages, connect reliably from the right country; they do not make prohibited activity acceptable.

Frequently asked questions