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[ABOUT](https://hackertarget.com/as-ip-lookup/) - [Use Cases](https://hackertarget.com/use-cases/) - [About & FAQ](https://hackertarget.com/about/) - [What is a Vulnerability Scanner?](https://hackertarget.com/vulnerability-scanner/) [PRICING](https://hackertarget.com/scan-membership/) [LOGIN](https://hackertarget.com/wp-login.php) [PRICING](https://hackertarget.com/scan-membership/) [LOG IN](https://hackertarget.com/wp-login.php) # Autonomous System Lookup (AS / ASN / IP) Check an Autonomous System Number (**ASN**) for IP prefixes ([subnets](https://hackertarget.com/subnet-lookup-online/)) or lookup an IP address (**IPv4** or **IPv6**) to get **details and owner of the AS**. To search all ASN's belonging to an organisation, simply enter a **text search** string. Valid Input: 8\.8.8.8 AS3333 Name (String to search) ###### ASN Query Formats Perform ASN lookups as shown in the examples below. Enter either as a single query, a list (IP's or AS Numbers), or a comma-separated list. Lookup one or more IP's Single query or a list 9.9.9.9 8\.8.8.8 Comma separated 1\.1.1.1,8.8.4.4 Lookup one or more AS Numbers Single query or a list AS15169 3333 Comma separated 15169,3333 Search for AS Names Single query APPLE ## What is an Autonomous System (AS) The Internet is made up of [Autonomous Systems](https://en.wikipedia.org/wiki/Autonomous_system_\(Internet\)), these are collections of IP routing prefixes that allow Internet connected systems to communicate with each other. Without this routing the Internet simply would not work. Use this tool to identify the **registered owner of an IP range**, in that the system owner that contains the IP address. Keep in mind that there is no direct correlation between the IP address location from the ASN and [geolocation](https://hackertarget.com/geoip-ip-location-lookup/ "GeoIP Lookup Tool"). Many organisations have **Autonomous Systems that span continents**; if an IP address is found in an AS based in the United States, this does not necessarily mean the IP address is on a system physically located within the United States. The **ASN search tool** found here is for quick lookups of an IP address or Autonomous System Number (ASN). Using the Free version of the tool has a limit of 50 lookups a day; this includes use of the other [IP Tools](https://hackertarget.com/ip-tools/ "IP & DNS Tools") that [HackerTarget.com](https://hackertarget.com/ "Security testing from HackerTarget.com") has made available. ## IPv6 ASN Lookup An ASN can be made up of IPv4 and IPv6 prefixes. Our tool will show all prefixes within the ASN including IPv6 network ranges. Querying an IPv6 address with the tool will show the ASN that the address belongs to. When using the ASN search to query a list of IP addresses you are able to mix IPv4 and IPv6 addresses within the one query. ## ASN Bulk Lookup Non-members can use the form above to enter **up to 25** IP addresses or AS numbers to query. Results can be **exported to XLSX** for inclusion in your security reports or other tools. ###### ASN Lookup Limits | | Free User | Member | |---|---|---| | Queries / day | 50 | 500-20'000 \# based on Plan | | Max Query Size | 25 | 20'000 | With a membership query up to 20000 IP addresses at once. A gold mine of data for security analysts, network defenders and other cyber security professionals.  To use the API see the details below, the API is only configured for single queries. ## ASN Lookup API This tool is built on a simple API that we have provided to the public as a Free service. To use the FREE version simply query the API and get your results. If you wish to use more than the **50 queries per day** quota [Remove limits with a Full Membership.](https://hackertarget.com/scan-membership/). Using the ASN API is a simple matter of querying the following URL with an IP address, or ASN, appended to the "q" parameter. See below for examples using both a plain text response and a `JSON` response. Use `curl` from the command line or a scripting language such as php, python, or ruby to make the HTTP request. If you are looking up an ASN ensure the format is as shown in the second example. ### ASN API - Simple Text Response Response is returned as plain text and in a `csv` format, comma separated with double quotes surrounding the fields. ``` curl https://api.hackertarget.com/aslookup/?q=1.1.1.1 curl -H "X-API-Key: ***apikeyhere***" https://api.hackertarget.com/aslookup/?q=AS15169 "1.1.1.1","13335","1.1.1.0/24","CLOUDFLARENET, US" ``` **Optional:** Include additional details of the ASN. The extra fields include Organization from `whois` data, the primary domain for the autonomous system owner and a description of the organization. ``` curl "https://api.hackertarget.com/aslookup/?q=8.8.8.8&details=true" "8.8.8.8","15169","8.8.8.0/24","GOOGLE, US","Google LLC","google.com","Google LLC is a multinational technology company operating in the internet and software industries. Their primary business purpose involves providing online services, including search, advertising, cloud computing, and hardware development." ``` ### ASN API - JSON response ``` curl "https://api.hackertarget.com/aslookup/?q=8.8.8.8&output=json" | jq { "asn": "15169", "asn_name": "GOOGLE, US", "asn_range": "8.8.8.0/24", "ip": "8.8.8.8" } ``` **Optional:** Similar to the text response, we can include additional details of the ASN. The extra fields are Organization from `whois` data, the primary domain for the autonomous system owner and a description of the organization. ``` curl "https://api.hackertarget.com/aslookup/?q=8.8.8.8&output=json&details=true" | jq { "asn": "15169", "asn_name": "GOOGLE, US", "asn_range": "8.8.8.0/24", "description": "Google LLC is a multinational technology company operating in the internet and software industries. Their primary business purpose involves providing online services, including search, advertising, cloud computing, and hardware development.", "domain": "google.com", "ip": "8.8.8.8", "organization": "Google LLC" } ``` ## Processing Multiple Requests Using the API get ASN details for a list of IP address is easily achieved with simple scripting. From simple `bash` as shown below to `python` or `powershell`. ``` while read line; do curl "https://api.hackertarget.com/aslookup/?q=$line" done IP Tags / Blocklists We have recently implemented additional IP address meta data from a well known public and open source security lists. If the IP address queried is listed in these resources it will be tagged in the table. List Name Description Link DShield A database of IP addresses reported for suspicious activities maintained by the well known SANS Institute. dshield.org AlienVault OTX An open threat exchange platform providing access to a global community-driven threat data. Alienvault Firehol Abusers Aggregated list of known comment & form spam IP addresses. Firehol Abusers abuse.ch (Feodo) Tracks and monitors Feodo Trojan botnet activities and malware. abuse.ch Spamhaus (Drop / eDrop) Maintains lists of IPs from which unsolicited bulk emails are received. Spamhaus Firehol (level 3) A blocklist aggregating various feeds to protect against the most severe attacks. Firehol 3 Tor Network Provides information on Tor nodes, focusing on anonymity and privacy online. Tor Project Other BGP Resources If you require more detail regarding the BGP routing of an Autonomous System, the Shadow Server Project has an excellent query tool available using DNS or Whois. There is also a Python module available for querying the service. Trusted Tools Vulnerability Scans and Network Intelligence Use Cases Recon Options Enumerate and Discover. Know the Network IP & DNS Recon Tools Get Access 28 vulnerability scanners and network tools Membership ``` ###### ABOUT From attack surface discovery to vulnerability identification, we host tools to make the job of securing your systems easier. 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Check an Autonomous System Number (**ASN**) for IP prefixes ([subnets](https://hackertarget.com/subnet-lookup-online/)) or lookup an IP address (**IPv4** or **IPv6**) to get **details and owner of the AS**. To search all ASN's belonging to an organisation, simply enter a **text search** string. Valid Input: 8\.8.8.8 AS3333 Name (String to search) ###### ASN Query Formats Perform ASN lookups as shown in the examples below. Enter either as a single query, a list (IP's or AS Numbers), or a comma-separated list. Lookup one or more IP's Single query or a list 9.9.9.9 8\.8.8.8 Comma separated 1\.1.1.1,8.8.4.4 Lookup one or more AS Numbers Single query or a list AS15169 3333 Comma separated 15169,3333 Search for AS Names Single query APPLE ## What is an Autonomous System (AS) The Internet is made up of [Autonomous Systems](https://en.wikipedia.org/wiki/Autonomous_system_\(Internet\)), these are collections of IP routing prefixes that allow Internet connected systems to communicate with each other. Without this routing the Internet simply would not work. Use this tool to identify the **registered owner of an IP range**, in that the system owner that contains the IP address. Keep in mind that there is no direct correlation between the IP address location from the ASN and [geolocation](https://hackertarget.com/geoip-ip-location-lookup/ "GeoIP Lookup Tool"). Many organisations have **Autonomous Systems that span continents**; if an IP address is found in an AS based in the United States, this does not necessarily mean the IP address is on a system physically located within the United States. The **ASN search tool** found here is for quick lookups of an IP address or Autonomous System Number (ASN). Using the Free version of the tool has a limit of 50 lookups a day; this includes use of the other [IP Tools](https://hackertarget.com/ip-tools/ "IP & DNS Tools") that [HackerTarget.com](https://hackertarget.com/ "Security testing from HackerTarget.com") has made available. ## IPv6 ASN Lookup An ASN can be made up of IPv4 and IPv6 prefixes. Our tool will show all prefixes within the ASN including IPv6 network ranges. Querying an IPv6 address with the tool will show the ASN that the address belongs to. When using the ASN search to query a list of IP addresses you are able to mix IPv4 and IPv6 addresses within the one query. ## ASN Bulk Lookup Non-members can use the form above to enter **up to 25** IP addresses or AS numbers to query. Results can be **exported to XLSX** for inclusion in your security reports or other tools. To use the API see the details below, the API is only configured for single queries. ## ASN Lookup API This tool is built on a simple API that we have provided to the public as a Free service. To use the FREE version simply query the API and get your results. If you wish to use more than the **50 queries per day** quota [Remove limits with a Full Membership.](https://hackertarget.com/scan-membership/). Using the ASN API is a simple matter of querying the following URL with an IP address, or ASN, appended to the "q" parameter. See below for examples using both a plain text response and a `JSON` response. Use `curl` from the command line or a scripting language such as php, python, or ruby to make the HTTP request. If you are looking up an ASN ensure the format is as shown in the second example. ### ASN API - Simple Text Response Response is returned as plain text and in a `csv` format, comma separated with double quotes surrounding the fields. ``` curl https://api.hackertarget.com/aslookup/?q=1.1.1.1 curl -H "X-API-Key: ***apikeyhere***" https://api.hackertarget.com/aslookup/?q=AS15169 "1.1.1.1","13335","1.1.1.0/24","CLOUDFLARENET, US" ``` **Optional:** Include additional details of the ASN. The extra fields include Organization from `whois` data, the primary domain for the autonomous system owner and a description of the organization. ``` curl "https://api.hackertarget.com/aslookup/?q=8.8.8.8&details=true" "8.8.8.8","15169","8.8.8.0/24","GOOGLE, US","Google LLC","google.com","Google LLC is a multinational technology company operating in the internet and software industries. Their primary business purpose involves providing online services, including search, advertising, cloud computing, and hardware development." ``` ### ASN API - JSON response ``` curl "https://api.hackertarget.com/aslookup/?q=8.8.8.8&output=json" | jq { "asn": "15169", "asn_name": "GOOGLE, US", "asn_range": "8.8.8.0/24", "ip": "8.8.8.8" } ``` **Optional:** Similar to the text response, we can include additional details of the ASN. The extra fields are Organization from `whois` data, the primary domain for the autonomous system owner and a description of the organization. ``` curl "https://api.hackertarget.com/aslookup/?q=8.8.8.8&output=json&details=true" | jq { "asn": "15169", "asn_name": "GOOGLE, US", "asn_range": "8.8.8.0/24", "description": "Google LLC is a multinational technology company operating in the internet and software industries. Their primary business purpose involves providing online services, including search, advertising, cloud computing, and hardware development.", "domain": "google.com", "ip": "8.8.8.8", "organization": "Google LLC" } ``` ## Processing Multiple Requests Using the API get ASN details for a list of IP address is easily achieved with simple scripting. From simple `bash` as shown below to `python` or `powershell`. ``` while read line; do curl "https://api.hackertarget.com/aslookup/?q=$line" done IP Tags / Blocklists We have recently implemented additional IP address meta data from a well known public and open source security lists. If the IP address queried is listed in these resources it will be tagged in the table. List Name Description Link DShield A database of IP addresses reported for suspicious activities maintained by the well known SANS Institute. dshield.org AlienVault OTX An open threat exchange platform providing access to a global community-driven threat data. Alienvault Firehol Abusers Aggregated list of known comment & form spam IP addresses. Firehol Abusers abuse.ch (Feodo) Tracks and monitors Feodo Trojan botnet activities and malware. abuse.ch Spamhaus (Drop / eDrop) Maintains lists of IPs from which unsolicited bulk emails are received. Spamhaus Firehol (level 3) A blocklist aggregating various feeds to protect against the most severe attacks. Firehol 3 Tor Network Provides information on Tor nodes, focusing on anonymity and privacy online. Tor Project Other BGP Resources If you require more detail regarding the BGP routing of an Autonomous System, the Shadow Server Project has an excellent query tool available using DNS or Whois. There is also a Python module available for querying the service. Vulnerability Scans and Network Intelligence Use Cases 28 vulnerability scanners and network tools Membership ```