AS51906 RECAST-AS
AS51906 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.
Check an IP from AS51906
Look up any address in real time with the free IP checker, or from your own code:
curl "https://fraudex.xyz/api/check?ip=31.204.112.0" \ -H "X-API-Key: fx_your_key"
The answer includes the network (AS51906), 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 AS51906
| First IP | Last IP | CIDR | Addresses |
|---|---|---|---|
| 31.204.112.0 | 31.204.115.255 | 31.204.112.0/22 | 1,024 |
| 31.204.116.0 | 31.204.123.255 | 31.204.116.0/22, 31.204.120.0/22 | 2,048 |
| 37.130.128.0 | 37.130.139.255 | 37.130.128.0/21, 37.130.136.0/22 | 3,072 |
| 37.130.141.0 | 37.130.141.255 | 37.130.141.0/24 | 256 |
| 37.130.143.0 | 37.130.143.255 | 37.130.143.0/24 | 256 |
| 79.171.56.0 | 79.171.60.255 | 79.171.56.0/22, 79.171.60.0/24 | 1,280 |
| 79.171.61.0 | 79.171.63.255 | 79.171.61.0/24, 79.171.62.0/23 | 768 |
| 82.197.132.0 | 82.197.133.255 | 82.197.132.0/23 | 512 |
| 91.106.0.0 | 91.106.15.255 | 91.106.0.0/20 | 4,096 |
| 146.66.224.0 | 146.66.227.255 | 146.66.224.0/22 | 1,024 |
| 146.66.229.0 | 146.66.231.255 | 146.66.229.0/24, 146.66.230.0/23 | 768 |
| 176.241.160.0 | 176.241.175.255 | 176.241.160.0/20 | 4,096 |
IPv6 ranges announced by AS51906
| First IP | Last IP | CIDR |
|---|---|---|
| 2001:7f0:101:: | 2001:7f0:101:ffff:ffff:ffff:ffff:ffff | 2001:7f0:101::/48 |
| 2a00:7380:: | 2a00:7380:5ff:ffff:ffff:ffff:ffff:ffff | 2a00:7380::/38, 2a00:7380:400::/39 |
| 2a00:7380:600:: | 2a00:7380:feec:ffff:ffff:ffff:ffff:ffff | 2a00:7380:600::/39, 2a00:7380:800::/37, 2a00:7380:1000::/36, 2a00:7380:2000::/35 +13 |
| 2a00:7380:feee:: | 2a00:7380:ffff:ffff:ffff:ffff:ffff:ffff | 2a00:7380:feee::/47, 2a00:7380:fef0::/44, 2a00:7380:ff00::/40 |
Questions about AS51906
Is AS51906 a VPN or hosting network?
Fraudex does not list AS51906 (RECAST-AS) as a VPN, proxy or hosting network. Its addresses are treated as regular traffic, apart from any Tor exit relays.
Which country is AS51906 registered in?
AS51906 is registered in Germany. Individual addresses can be used elsewhere, so check the IP itself when location matters.
How many IP addresses does AS51906 have?
It announces 12 IPv4 ranges with 19,200 addresses in total, plus 4 IPv6 ranges.
How do I block traffic from AS51906?
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.