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AS11003
PANDG

AS11003 announces 4,090,368 IPv4 addresses across 46 routed ranges, registered in US. Figures come from the public global routing table and are refreshed daily.

4.1M addressesIPv4 space announced
46Routed ranges
USRegistry country

Is AS11003 datacenter space?

Not according to the nine cloud and CDN providers whose published range lists we track. That is a statement about those specific lists, not proof the space is residential — plenty of hosting companies never publish machine-readable ranges, and this AS may well be one of them.

The reliable way to classify a specific address is to check it directly rather than to infer from the AS. The free lookup tool checks any address against the Tor exit list and the published cloud-provider ranges. VPN and proxy verdicts need a live visit: they come from a /v1/evaluate call with the browser token, not from a bare address.

What an AS number does and does not tell you

An autonomous system number identifies who announces a block of addresses to the internet's routing table. It is an organisational fact, and a durable one — useful for attributing traffic to a hosting company, a carrier, or a university.

It is not a risk signal. A residential ISP's AS carries the household traffic of millions of ordinary customers and, at the same time, whatever residential proxy exits have been installed on those customers' devices. A hosting AS carries scrapers and legitimate server-to-server integrations in the same ranges. Scoring an address on the reputation of its AS produces exactly the false positives that make fraud tooling untrustworthy.

Maskbreak does not feed AS names or routing data into its risk score. Tunnel detection comes from live network intelligence, and the dch signal comes from provider-published ranges. This directory exists to answer "who announces this address," which is a different and genuinely useful question.

Announced IPv4 ranges

All 46 announced ranges.

Range startRange endAddresses
103.145.94.0103.145.95.255512
131.190.0.0131.190.255.25565,536
137.176.0.0137.180.139.255297,984
137.180.142.0137.183.231.255219,648
137.183.234.0137.183.255.2555,632
137.185.0.0137.185.247.25563,488
137.185.250.0137.185.251.255512
137.185.254.0137.185.255.255512
143.1.0.0143.8.255.255524,288
143.10.0.0143.12.255.255196,608
143.15.0.0143.16.175.255110,592
143.16.180.0143.16.187.2552,048
143.16.190.0143.19.255.255213,504
143.21.0.0143.26.143.255364,544
143.26.148.0143.27.111.25556,320
143.27.114.0143.27.125.2553,072
143.27.128.0143.27.161.2558,704
143.27.164.0143.28.231.25582,944
143.28.234.0143.29.61.25521,504
143.29.64.0143.31.34.255123,648
143.31.36.0143.34.39.255197,632
143.34.42.0143.40.255.255448,000
151.208.0.0151.208.255.25565,536
155.111.0.0155.113.1.255131,584
155.113.4.0155.113.37.2558,704
155.113.40.0155.113.63.2556,144
155.113.68.0155.113.101.2558,704
155.113.104.0155.113.127.2556,144
155.113.132.0155.113.165.2558,704
155.113.168.0155.113.247.25520,480
155.113.252.0155.114.255.25566,560
155.118.0.0155.120.255.255196,608
155.122.0.0155.124.243.255193,536
155.124.246.0155.125.23.2558,704
155.125.26.0155.126.7.25560,928
155.126.10.0155.126.175.25542,496
155.126.178.0155.129.255.255216,576
192.44.91.0192.44.215.25532,000
192.229.1.0192.229.20.2555,120
193.17.96.0193.17.103.2552,048
193.17.107.0193.17.107.255256
193.17.111.0193.17.111.255256
193.17.114.0193.17.115.255512
193.17.118.0193.17.119.255512
193.17.122.0193.17.123.255512
193.17.126.0193.17.127.255512

Check a specific address

The AS tells you who announces a range. An address check answers whether one address inside it is a Tor exit or sits in a published cloud range — for example 103.145.94.0, the first address in this AS's announced space; whether a visitor is on a VPN or proxy needs a live visit. The free lookup tool takes any address, and the IP intelligence hub explains what each signal means.

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