How PureIP scores an IP

Version 1 · updated September 26, 2026 · used by the curl pureip.app/claude report

This score is computed entirely by PureIP and does not depend on any third-party score. How every point is earned or deducted is written down here so you can check it line by line.

1. Start value: set by network type

We first estimate which kind of network the IP belongs to, then take its start value. Datacenter IPs start low because they do not look like an ordinary user's network.

Network type	Start	How it is judged
Residential	100	ASN holder name looks like an ISP (telecom, broadband, cable) and not a hosting provider
Mobile	95	Holder name contains mobile, wireless, cellular and similar
Unknown	80	No match by name or list. A cautious middle value
Datacenter	60	ASN is on the known-hosting list (43 ASNs), or the holder name contains hosting, cloud, vps and similar

2. Deductions

Item	Deduction	Notes
Blocklist hits	−10 per list, at most −30	4 live lists are queried: dnsbl-1.uceprotect.net, bl.spamcop.net, dnsbl.dronebl.org, psbl.surriel.com. IPv4 only. A hit is one list at one moment, not proof that a whole network is bad.
Tor exit node	score capped at 20	From the Tor Project's public exit list.
Registration vs geolocation country differ	−10	A "broadcast IP": registered in one country, used in another. Some registries (e.g. ARIN) do not publish a country, in which case this is not assessed.

3. The bar

Our bar is 90. It is our own convention, not an Anthropic standard. Only a residential or mobile IP with no deductions can reach it; a datacenter IP tops out at 60 and therefore always falls below. That matches common experience but does not mean a datacenter IP cannot use Claude.

4. What is not assessed

We have no reliable data source for VPN/proxy flags, abuse intelligence or fraud scores, so we do not assess or guess them. When a data source fails to answer during a lookup, it is listed explicitly and neither adds nor deducts.

5. Data sources

ASN, holder name, route prefix	RIPEstat
Registration country	RDAP (public registry data)
Geolocation country	ipwho.is, falling back to ip.sb
Blocklists	Lists above, queried through Cloudflare DNS-over-HTTPS
Tor exit list	check.torproject.org

6. Limits

Network type is an estimate from a list and holder names, not a manual label. It can be wrong, especially for operators whose names have no typical keywords.
The score reflects the IP profile only. It says nothing about account status or regional eligibility and cannot predict whether an account will be restricted.
It sees one side. Real reachability to claude.ai must be tested from the machine itself; the report includes the command.

7. Check it yourself

This returns the raw data behind every step:

curl 'https://pureip.app/claude/8.8.8.8?format=json'