AS3371 MCI-ASN

Not flagged: treated as regular traffic

AS3371 is not on Fraudex's VPN, proxy and datacenter list, so its IPs are treated like ordinary home, mobile or business connections. A single address can still be flagged if it is a Tor exit relay.

CountryUnited States
IPv4 ranges71
IPv4 addresses1,154,304
IPv6 ranges3
Tor exits now0

Check an IP from AS3371

Look up any address in real time with the free IP checker, or from your own code:

curl "https://fraudex.xyz/api/check?ip=63.39.0.0" \
  -H "X-API-Key: fx_your_key"

The answer includes the network (AS3371), the country and a VPN, proxy, Tor and bot verdict, in under a millisecond. Plans start at $40 for 30 days of unlimited lookups.

IPv4 ranges announced by AS3371

First IPLast IPCIDRAddresses
63.39.0.063.39.159.25563.39.0.0/17, 63.39.128.0/1940,960
63.39.208.063.39.239.25563.39.208.0/20, 63.39.224.0/208,192
63.91.192.063.91.255.25563.91.192.0/1816,384
69.96.0.069.96.15.25569.96.0.0/204,096
69.103.0.069.103.255.25569.103.0.0/1665,536
100.5.64.0100.5.127.255100.5.64.0/1816,384
108.37.128.0108.37.255.255108.37.128.0/1732,768
142.77.8.0142.77.11.255142.77.8.0/221,024
142.77.72.0142.77.95.255142.77.72.0/21, 142.77.80.0/206,144
153.39.96.0153.39.255.255153.39.96.0/19, 153.39.128.0/1740,960
159.98.0.0159.98.71.255159.98.0.0/18, 159.98.64.0/2118,432
159.98.80.0159.98.103.255159.98.80.0/20, 159.98.96.0/216,144
159.98.116.0159.98.255.255159.98.116.0/22, 159.98.120.0/21, 159.98.128.0/1735,840
162.47.152.0162.47.155.255162.47.152.0/221,024
165.122.48.0165.122.63.255165.122.48.0/204,096
166.32.32.0166.32.47.255166.32.32.0/204,096
166.32.64.0166.32.127.255166.32.64.0/1816,384
166.32.176.0166.32.207.255166.32.176.0/20, 166.32.192.0/208,192
166.32.208.0166.32.239.255166.32.208.0/20, 166.32.224.0/208,192
166.33.128.0166.33.159.255166.33.128.0/198,192
166.33.208.0166.34.63.255166.33.208.0/20, 166.33.224.0/19, 166.34.0.0/1828,672
166.35.0.0166.35.127.255166.35.0.0/1732,768
166.36.32.0166.36.79.255166.36.32.0/19, 166.36.64.0/2012,288
166.36.96.0166.36.255.255166.36.96.0/19, 166.36.128.0/1740,960
166.37.64.0166.37.95.255166.37.64.0/198,192
166.37.128.0166.37.193.255166.37.128.0/18, 166.37.192.0/2316,896
166.37.196.0166.37.199.255166.37.196.0/221,024
166.37.224.0166.37.231.255166.37.224.0/212,048
166.38.0.0166.38.33.255166.38.0.0/19, 166.38.32.0/238,704
166.38.35.0166.38.37.255166.38.35.0/24, 166.38.36.0/23768
166.38.39.0166.38.51.255166.38.39.0/24, 166.38.40.0/21, 166.38.48.0/223,328
166.38.54.0166.38.75.255166.38.54.0/23, 166.38.56.0/21, 166.38.64.0/21, 166.38.72.0/225,632
166.38.80.0166.38.95.255166.38.80.0/204,096
166.38.128.0166.38.131.255166.38.128.0/221,024
166.38.134.0166.38.135.255166.38.134.0/23512
166.38.138.0166.38.159.255166.38.138.0/23, 166.38.140.0/22, 166.38.144.0/205,632
166.38.177.0166.38.177.255166.38.177.0/24256
166.38.184.0166.38.187.255166.38.184.0/221,024
166.38.240.0166.38.255.255166.38.240.0/204,096
166.39.16.0166.39.63.255166.39.16.0/20, 166.39.32.0/1912,288
166.39.96.0166.39.115.255166.39.96.0/20, 166.39.112.0/225,120
166.39.160.0166.39.207.255166.39.160.0/19, 166.39.192.0/2012,288
166.39.224.0166.40.111.255166.39.224.0/19, 166.40.0.0/18, 166.40.64.0/19, 166.40.96.0/2036,864
166.40.128.0166.40.160.255166.40.128.0/19, 166.40.160.0/248,448
166.40.168.0166.40.168.255166.40.168.0/24256
166.40.170.0166.40.171.255166.40.170.0/23512
166.40.174.0166.40.215.255166.40.174.0/23, 166.40.176.0/20, 166.40.192.0/20, 166.40.208.0/2110,752
166.40.224.0166.41.15.255166.40.224.0/19, 166.41.0.0/2012,288
166.41.64.0166.41.143.255166.41.64.0/18, 166.41.128.0/2020,480
166.41.208.0166.43.143.255166.41.208.0/20, 166.41.224.0/19, 166.42.0.0/16, 166.43.0.0/17 +1114,688
166.43.192.0166.43.255.255166.43.192.0/1816,384
166.44.0.0166.44.239.255166.44.0.0/17, 166.44.128.0/18, 166.44.192.0/19, 166.44.224.0/2061,440
166.44.242.0166.44.251.255166.44.242.0/23, 166.44.244.0/22, 166.44.248.0/222,560
166.44.252.0166.46.111.255166.44.252.0/22, 166.45.0.0/16, 166.46.0.0/18, 166.46.64.0/19 +195,232
166.46.128.0166.46.159.255166.46.128.0/198,192
166.46.208.0166.46.223.255166.46.208.0/204,096
166.46.240.0166.47.143.255166.46.240.0/20, 166.47.0.0/17, 166.47.128.0/2040,960
166.47.176.0166.47.239.255166.47.176.0/20, 166.47.192.0/19, 166.47.224.0/2016,384
166.50.0.0166.50.79.255166.50.0.0/18, 166.50.64.0/2020,480
166.50.96.0166.50.255.255166.50.96.0/19, 166.50.128.0/1740,960
166.56.0.0166.56.31.255166.56.0.0/198,192
166.56.128.0166.56.247.255166.56.128.0/18, 166.56.192.0/19, 166.56.224.0/20, 166.56.240.0/2130,720
166.56.250.0166.56.255.255166.56.250.0/23, 166.56.252.0/221,536
166.58.48.0166.58.127.255166.58.48.0/20, 166.58.64.0/1820,480
166.58.144.0166.58.223.255166.58.144.0/20, 166.58.160.0/19, 166.58.192.0/1920,480
166.58.240.0166.58.247.255166.58.240.0/212,048
199.170.112.0199.170.112.255199.170.112.0/24256
199.202.116.0199.202.116.255199.202.116.0/24256
205.150.160.0205.150.160.255205.150.160.0/24256
205.150.162.0205.150.162.255205.150.162.0/24256
209.154.224.0209.154.255.255209.154.224.0/198,192

IPv6 ranges announced by AS3371

First IPLast IPCIDR
2600:80e::2600:80e:ffff:ffff:ffff:ffff:ffff:ffff2600:80e::/32
2600:40f2::2600:40f2:ffff:ffff:ffff:ffff:ffff:ffff2600:40f2::/32
2600:40ff:fff1::2600:40ff:fff1:ffff:ffff:ffff:ffff:ffff2600:40ff:fff1::/48

Questions about AS3371

Is AS3371 a VPN or hosting network?

Fraudex does not list AS3371 (MCI-ASN) as a VPN, proxy or hosting network. Its addresses are treated as regular traffic, apart from any Tor exit relays.

Which country is AS3371 registered in?

AS3371 is registered in United States. Individual addresses can be used elsewhere, so check the IP itself when location matters.

How many IP addresses does AS3371 have?

It announces 71 IPv4 ranges with 1,154,304 addresses in total, plus 3 IPv6 ranges.

How do I block traffic from AS3371?

Blocking a whole network by number goes stale as ranges change hands. It is more reliable to check each visitor's IP when they sign up, log in or pay: the Fraudex API returns the network and a VPN and bot verdict, so you can block, challenge or just log flagged traffic. See why an IP blocking API pays for itself.

Other large networks in United States

All networks in United States →