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AS28573
Claro NXT Telecomunicacoes Ltda

AS28573 announces 9,957,632 IPv4 addresses across 194 routed ranges, registered in BR. Figures come from the public global routing table and are refreshed daily.

10M addressesIPv4 space announced
194Routed ranges
BRRegistry country

Is AS28573 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

All 194 announced ranges.

Range startRange endAddresses
177.32.0.0177.32.35.2559,216
177.32.36.0177.33.87.25578,848
177.33.88.0177.34.119.25573,728
177.34.128.0177.35.58.25547,872
177.35.59.0177.35.255.25550,432
177.64.0.0177.64.119.25530,720
177.64.128.0177.65.63.25549,152
177.65.96.0177.65.111.2554,096
177.65.128.0177.65.255.25532,768
177.80.0.0177.83.255.255262,144
177.100.0.0177.100.17.2554,608
177.100.20.0177.100.31.2553,072
177.100.48.0177.100.95.25512,288
177.100.104.0177.100.165.25515,872
177.100.168.0177.100.239.25518,432
177.127.0.0177.127.31.2558,192
177.127.36.0177.127.43.2552,048
177.127.48.0177.127.255.25553,248
177.140.0.0177.140.15.2554,096
177.140.16.0177.140.107.25523,552
177.140.108.0177.143.127.255201,728
177.143.160.0177.143.187.2557,168
177.143.192.0177.143.255.25516,384
177.180.0.0177.180.31.2558,192
177.180.48.0177.181.111.25581,920
177.181.160.0177.183.255.255155,648
177.192.0.0177.195.191.255245,760
177.195.208.0177.195.255.25512,288
177.235.0.0177.235.255.25565,536
179.105.0.0179.105.255.25565,536
179.136.0.0179.136.95.25524,576
179.136.96.0179.137.135.25575,776
179.137.136.0179.143.255.255423,936
179.152.0.0179.155.31.255204,800
179.155.64.0179.155.130.25517,152
179.155.131.0179.155.132.255512
179.155.133.0179.155.139.2551,792
179.155.140.0179.157.23.255101,376
179.157.32.0179.157.203.25544,032
179.157.204.0179.159.255.255144,384
179.208.0.0179.208.161.25541,472
179.208.162.0179.209.47.25536,352
179.209.48.0179.209.143.25524,576
179.209.144.0179.211.79.255114,688
179.211.96.0179.211.107.2553,072
179.211.108.0179.215.88.255257,280
179.215.89.0179.215.223.25534,560
179.216.0.0179.216.63.25516,384
179.216.80.0179.221.175.255352,256
179.221.192.0179.221.235.25511,264
179.221.236.0179.223.13.25574,240
179.223.14.0179.223.35.2555,632
179.223.36.0179.223.39.2551,024
179.223.40.0179.223.77.2559,728
179.223.78.0179.223.99.2555,632
179.223.100.0179.223.255.25539,936
179.232.0.0179.232.227.25558,368
179.232.228.0179.233.31.25515,360
179.233.64.0179.234.51.25562,464
179.234.52.0179.235.225.255110,080
179.235.226.0179.235.255.2557,680
181.213.0.0181.213.132.25534,048
181.213.133.0181.213.141.2552,304
181.213.142.0181.213.143.255512
181.213.144.0181.213.157.2553,584
181.213.158.0181.213.166.2552,304
181.213.167.0181.213.255.25522,784
181.216.32.0181.216.247.25555,296
181.217.0.0181.217.7.2552,048
181.217.40.0181.217.173.25534,304
181.217.174.0181.218.77.25540,960
181.218.78.0181.218.103.2556,656
181.218.120.0181.218.239.25530,720
181.218.248.0181.219.87.25524,576
181.219.96.0181.219.165.25517,920
181.219.166.0181.221.79.255109,056
181.221.80.0181.222.167.25588,064
181.222.168.0181.222.179.2553,072
181.222.180.0181.223.63.25535,840
181.223.96.0181.223.253.25540,448
181.223.254.0181.223.255.255512
186.204.0.0186.204.123.25531,744
186.204.124.0186.206.175.255144,384
186.206.176.0186.207.39.25530,720
186.207.40.0186.207.255.25555,296
186.218.0.0186.218.23.2556,144
186.218.28.0186.218.79.25513,312
186.218.96.0186.218.155.25515,360
186.218.160.0186.218.215.25514,336
186.218.220.0186.218.239.2555,120
186.218.244.0186.218.255.2553,072
186.220.0.0186.220.39.25510,240
186.220.40.0186.220.199.25540,960
186.220.200.0186.222.95.255104,448
186.222.112.0186.223.235.25597,280
186.223.236.0186.223.255.2555,120
187.2.0.0187.2.105.25527,136
187.2.106.0187.3.255.255103,936
187.20.0.0187.20.159.25540,960
187.20.192.0187.20.215.2556,144

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