AS21508 COMCAST-21508
AS21508 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 AS21508
Look up any address in real time with the free IP checker, or from your own code:
curl "https://fraudex.xyz/api/check?ip=50.204.101.0" \ -H "X-API-Key: fx_your_key"
The answer includes the network (AS21508), 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 AS21508
| First IP | Last IP | CIDR | Addresses |
|---|---|---|---|
| 50.204.101.0 | 50.204.101.255 | 50.204.101.0/24 | 256 |
| 50.205.217.0 | 50.205.217.255 | 50.205.217.0/24 | 256 |
| 50.216.229.0 | 50.216.229.255 | 50.216.229.0/24 | 256 |
| 50.217.1.0 | 50.217.1.255 | 50.217.1.0/24 | 256 |
| 50.217.207.0 | 50.217.207.255 | 50.217.207.0/24 | 256 |
| 50.218.47.0 | 50.218.47.255 | 50.218.47.0/24 | 256 |
| 50.219.12.0 | 50.219.15.255 | 50.219.12.0/22 | 1,024 |
| 50.228.113.0 | 50.228.113.255 | 50.228.113.0/24 | 256 |
| 50.229.113.0 | 50.229.114.255 | 50.229.113.0/24, 50.229.114.0/24 | 512 |
| 50.235.34.0 | 50.235.34.255 | 50.235.34.0/24 | 256 |
| 141.104.0.0 | 141.104.255.255 | 141.104.0.0/16 | 65,536 |
| 157.240.147.0 | 157.240.148.255 | 157.240.147.0/24, 157.240.148.0/24 | 512 |
| 173.242.174.0 | 173.242.174.255 | 173.242.174.0/24 | 256 |
| 198.90.112.0 | 198.90.115.255 | 198.90.112.0/22 | 1,024 |
| 204.194.47.0 | 204.194.47.255 | 204.194.47.0/24 | 256 |
| 205.223.19.0 | 205.223.19.255 | 205.223.19.0/24 | 256 |
IPv6 ranges announced by AS21508
Showing the first 30 of 58 ranges.
| First IP | Last IP | CIDR |
|---|---|---|
| 2001:559:8a:: | 2001:559:8a:ffff:ffff:ffff:ffff:ffff | 2001:559:8a::/48 |
| 2001:559:c0:: | 2001:559:c0:ffff:ffff:ffff:ffff:ffff | 2001:559:c0::/48 |
| 2001:559:f7:: | 2001:559:f7:ffff:ffff:ffff:ffff:ffff | 2001:559:f7::/48 |
| 2001:559:220:: | 2001:559:220:ffff:ffff:ffff:ffff:ffff | 2001:559:220::/48 |
| 2001:559:243:: | 2001:559:243:ffff:ffff:ffff:ffff:ffff | 2001:559:243::/48 |
| 2001:559:280:: | 2001:559:280:ffff:ffff:ffff:ffff:ffff | 2001:559:280::/48 |
| 2001:559:37d:: | 2001:559:37d:ffff:ffff:ffff:ffff:ffff | 2001:559:37d::/48 |
| 2001:559:3ac:: | 2001:559:3ac:ffff:ffff:ffff:ffff:ffff | 2001:559:3ac::/48 |
| 2001:559:3b9:: | 2001:559:3b9:ffff:ffff:ffff:ffff:ffff | 2001:559:3b9::/48 |
| 2001:559:3c8:: | 2001:559:3c8:ffff:ffff:ffff:ffff:ffff | 2001:559:3c8::/48 |
| 2001:559:40a:: | 2001:559:40a:ffff:ffff:ffff:ffff:ffff | 2001:559:40a::/48 |
| 2001:559:49a:: | 2001:559:49b:ffff:ffff:ffff:ffff:ffff | 2001:559:49a::/47 |
| 2001:559:53c:: | 2001:559:53c:ffff:ffff:ffff:ffff:ffff | 2001:559:53c::/48 |
| 2001:559:5c9:: | 2001:559:5c9:ffff:ffff:ffff:ffff:ffff | 2001:559:5c9::/48 |
| 2001:559:5db:: | 2001:559:5db:ffff:ffff:ffff:ffff:ffff | 2001:559:5db::/48 |
| 2001:559:72b:: | 2001:559:72b:ffff:ffff:ffff:ffff:ffff | 2001:559:72b::/48 |
| 2001:559:73c:: | 2001:559:73c:ffff:ffff:ffff:ffff:ffff | 2001:559:73c::/48 |
| 2001:559:788:: | 2001:559:788:ffff:ffff:ffff:ffff:ffff | 2001:559:788::/48 |
| 2001:559:78a:: | 2001:559:78a:ffff:ffff:ffff:ffff:ffff | 2001:559:78a::/48 |
| 2001:559:79d:: | 2001:559:79e:ffff:ffff:ffff:ffff:ffff | 2001:559:79d::/48, 2001:559:79e::/48 |
| 2001:559:7a7:: | 2001:559:7a7:ffff:ffff:ffff:ffff:ffff | 2001:559:7a7::/48 |
| 2001:559:7db:: | 2001:559:7db:ffff:ffff:ffff:ffff:ffff | 2001:559:7db::/48 |
| 2001:559:804c:: | 2001:559:804c:ffff:ffff:ffff:ffff:ffff | 2001:559:804c::/48 |
| 2001:559:81bf:: | 2001:559:81bf:ffff:ffff:ffff:ffff:ffff | 2001:559:81bf::/48 |
| 2001:559:81d7:: | 2001:559:81d8:ffff:ffff:ffff:ffff:ffff | 2001:559:81d7::/48, 2001:559:81d8::/48 |
| 2001:559:8201:: | 2001:559:8201:ffff:ffff:ffff:ffff:ffff | 2001:559:8201::/48 |
| 2001:559:82fd:: | 2001:559:82fd:ffff:ffff:ffff:ffff:ffff | 2001:559:82fd::/48 |
| 2001:559:833e:: | 2001:559:833e:ffff:ffff:ffff:ffff:ffff | 2001:559:833e::/48 |
| 2001:559:8416:: | 2001:559:8416:ffff:ffff:ffff:ffff:ffff | 2001:559:8416::/48 |
| 2001:559:841c:: | 2001:559:841c:ffff:ffff:ffff:ffff:ffff | 2001:559:841c::/48 |
Questions about AS21508
Is AS21508 a VPN or hosting network?
Fraudex does not list AS21508 (COMCAST-21508) as a VPN, proxy or hosting network. Its addresses are treated as regular traffic, apart from any Tor exit relays.
Which country is AS21508 registered in?
AS21508 is registered in United States. Individual addresses can be used elsewhere, so check the IP itself when location matters.
How many IP addresses does AS21508 have?
It announces 16 IPv4 ranges with 71,424 addresses in total, plus 58 IPv6 ranges.
How do I block traffic from AS21508?
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.