ASN Check

Given a list of IPs the tool returns their AS numbers and names.

Data sources:

• ASN ranges IPv4- Thyme APNIC,
• ASN ranges IPv6- Thyme APNIC,
• AS names - ripe.net,
• RFC #6890.

Features:

• Caching the data from sources - first run may take a long time,
• Binary IP network search for high throughput,
• Returns AS Number, AS Name and a country code for each IP address,
• Supports both IPv4 and IPv6,
• Reserved ranges included,
• Also available as a lib!

Installation

pip install asn-check

Options

  --input-file FILENAME           Input file with one IPv4 per line  [default:STDIN]
  --output-file FILENAME          Output file - csv, header: ip,asn,name,country_code  [default: STDOUT]
  --log-level [DEBUG|INFO|WARNING|ERROR|CRITICAL] Set logging level.  [default: WARNING]
  --help                          Show this message and exit.

Example CLI

$ echo '250.254.147.119
    12.154.0.67
    41.13.122.240
    176.218.30.1078
    128.105.177.84
    85.227.158.196
    74.74.207.74
    2a03:2880:f077::1' | asn-check 

Output:

ip,asn,name,country_code
250.254.147.119,rfc6890-t15,Reserved for Future Use,IANA
12.154.0.67,7018,ATT-INTERNET4,US
41.13.122.240,29975,VODACOM-,ZA
128.105.177.84,59,WISC-MADISON-AS,US
85.227.158.196,2119,TELENOR-NEXTEL Telenor Norge AS,NO
74.74.207.74,11351,TWC-11351-NORTHEAST,US
2a03:2880:f077::1,32934,FACEBOOK,US

Example Lib Usage

from ipaddress import ip_address
from asn_check import ASNChecker

checker = ASNChecker() 
print(checker.search(ip_address("12.154.0.67")))

Output:

{'ip': IPv4Address('12.154.0.67'), 'asn': '7018', 'name': 'ATT-INTERNET4', 'country_code': 'US'}

Note: If you'd like to use your own data sources, theoretically you can, but they need to follow the same format as the APNIC sources (and the format is not consistent!) - check out the constructor options asn_routes_url_v4, asn_routes_url_v6, asn_names_url. I'd recommend sticking to the defaults.