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AS209
CENTURYLINK-US-LEGACY-QWEST

AS209 announces 15,433,472 IPv4 addresses across 1,846 routed ranges, registered in US. Figures come from the public global routing table and are refreshed daily.

15.4M addressesIPv4 space announced
1,846Routed ranges
USRegistry country

Is AS209 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 returns live tunnel and datacenter signals for any 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.

Sentinel 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

First 100 of 1,846 ranges.

Range startRange endAddresses
8.15.5.08.15.5.255256
24.223.60.024.223.60.255256
24.223.74.024.223.75.255512
52.119.16.052.119.19.2551,024
52.119.22.052.119.24.255768
52.119.26.052.119.28.255768
52.119.29.052.119.31.255768
63.144.0.063.144.67.25517,408
63.144.69.063.144.69.255256
63.144.71.063.144.110.25510,240
63.144.112.063.144.114.255768
63.144.116.063.144.217.25526,112
63.144.219.063.144.239.2555,376
63.144.241.063.145.58.25518,944
63.145.60.063.145.62.255768
63.145.64.063.145.110.25512,032
63.145.112.063.145.116.2551,280
63.145.118.063.145.141.2556,144
63.145.143.063.145.198.25514,336
63.145.200.063.145.200.255256
63.145.202.063.145.245.25511,264
63.145.248.063.146.19.2557,168
63.146.21.063.146.29.2552,304
63.146.31.063.146.37.2551,792
63.146.39.063.146.82.25511,264
63.146.84.063.146.95.2553,072
63.146.97.063.146.152.25514,336
63.146.154.063.146.198.25511,520
63.146.200.063.146.243.25511,264
63.146.245.063.147.2.2553,584
63.147.4.063.147.9.2551,536
63.147.11.063.147.33.2555,888
63.147.35.063.147.39.2551,280
63.147.43.063.147.43.255256
63.147.46.063.147.46.255256
63.147.48.063.147.51.2551,024
63.147.53.063.147.61.2552,304
63.147.63.063.147.84.2555,632
63.147.86.063.147.91.2551,536
63.147.96.063.147.96.255256
63.147.108.063.147.147.25510,240
63.147.149.063.147.157.2552,304
63.147.159.063.147.191.2558,448
63.147.193.063.147.205.2553,328
63.147.207.063.148.10.25515,360
63.148.12.063.148.45.2558,704
63.148.47.063.148.59.2553,328
63.148.61.063.148.80.2555,120
63.148.82.063.148.88.2551,792
63.148.90.063.148.156.25517,152
63.148.158.063.148.160.255768
63.148.162.063.148.199.2559,728
63.148.201.063.148.207.2551,792
63.148.209.063.148.249.25510,496
63.148.251.063.149.17.2555,888
63.149.20.063.149.39.2555,120
63.149.41.063.149.59.2554,864
63.149.62.063.149.87.2556,656
63.149.89.063.149.102.2553,584
63.149.104.063.149.112.2552,304
63.149.114.063.149.124.2552,816
63.149.126.063.149.169.25511,264
63.149.171.063.149.187.2554,352
63.149.189.063.149.194.2551,536
63.149.196.063.150.20.25520,736
63.150.22.063.150.51.2557,680
63.150.53.063.150.73.2555,376
63.150.76.063.150.209.25534,304
63.150.212.063.150.213.255512
63.150.216.063.150.224.2552,304
63.150.226.063.150.243.2554,608
63.150.245.063.151.10.2555,632
63.151.12.063.151.18.2551,792
63.151.20.063.151.41.2555,632
63.151.44.063.151.51.2552,048
63.151.53.063.151.63.2552,816
63.151.72.063.151.89.2554,608
63.151.92.063.151.103.2553,072
63.151.105.063.151.115.2552,816
63.151.118.063.151.140.2555,888
63.151.142.063.151.179.2559,728
63.151.181.063.153.255.255150,272
63.154.0.063.155.31.25573,728
63.155.32.063.155.255.25557,344
63.156.1.063.156.48.25512,288
63.156.51.063.156.57.2551,792
63.156.59.063.156.61.255768
63.156.63.063.156.108.25511,776
63.156.110.063.156.134.2556,400
63.156.136.063.156.161.2556,656
63.156.163.063.156.164.255512
63.156.166.063.156.167.255512
63.156.169.063.157.37.25532,000
63.157.39.063.157.53.2553,840
63.157.55.063.157.111.25514,592
63.157.113.063.158.26.25543,520
63.158.28.063.158.85.25514,848
63.158.87.063.158.111.2556,400
63.158.113.063.158.113.255256
63.158.115.063.158.164.25512,800

Check a specific address

The AS tells you who announces a range. Whether one address inside it is currently a tunnel is a live question, answered per address — for example 8.15.5.0, the first address in this AS's announced space. The free lookup tool takes any address, and the IP intelligence hub explains what each signal means.

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