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Datacenter IP

published · September 10, 2026

A datacenter IP is an address inside a range operated by a hosting, cloud or server provider rather than by a consumer access network.

A datacenter IP is an address inside a range operated by a hosting, cloud or server provider rather than by a consumer access network. Somebody rented the machine behind it.

What Spaw answers

is_datacenter is the flag and hosting_provider names the operator when a feed identifies one. The risk score carries +40, above a commercial VPN (+30) and well below an unallocated address (+100), a blocklisted one (+80) or a Tor exit (+70).

What it means and what it does not

A person signing up from a datacenter address is not browsing from their sofa: they are on a VPS, a scraper, a CI runner, or a proxy someone rented. For a consumer signup that is unusual enough to be worth a second factor. For an API caller, a webhook receiver or a business customer it is completely ordinary, which is why the flag is a signal with a weight rather than a verdict.

The important limit is the other direction. An address that is not flagged is not thereby a person's home connection — see residential proxy for what open data cannot see.

Related

markdown version: /glossary/datacenter-ip.md

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More glossary

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    A calling window is the span of local hours a sender contacts people in. Spaw answers in_call_window from the number's time zones: clock arithmetic, not compliance advice.

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  • International (exit) prefix

    An international prefix is what is dialled to leave a country before the calling code: 00 in most of the world, 011 in North America. Spaw reads it and suggests a fix in did_you_mean.

  • International network number

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  • Number portability

    Number portability lets a subscriber keep a phone number when changing carrier. The number's block stays listed under the carrier it was issued to, so block data names the original holder.