ASN and Prefix Lookup

Search any ASN or Prefix to uncover their location, Whois entry, connectivity, RPKI validity and more.

126,689 ASN 5,357,922 Prefixes 117 Countries

API Endpoints

Origin	https://api.a1.io
Authentication	None — During public Beta

ASN data from its number

GET /asn/:asn

Example getting AS3 information

» REQUEST https://api.a1.io/asn/AS3

GET /asn/AS3 HTTP/1.1
Host: api.a1.io
Accept: application/json

« RESPONSE

HTTP/1.1 200 OK
Content-Type: application/json; charset=utf-8
Cache-Control: public, s-maxage=3600, max-age=600
Content-Type: application/json; charset=utf-8
Date: 

[
  {
    "input": "asn:3",
    "error": "",
    "asn": {
      "asn": 3,
      "rir_url": "https://rdap.arin.net/registry/autnum/3",
      "name": "MIT-GATEWAYS",
      "handle": "AS3",
      "domain": "mit.edu",
      "rir_name": "ARIN",
      "type": "",
      "country": "United States",
      "status": "active",
      "tech_handle": "SILIS-ARIN",
      "registrant_handle": "MIT-2",
      "registrant_type": "org",
      "registrant_name": "Massachusetts Institute of Technology",
      "registrant_address": "Room W92-167\r\n77 Massachusetts Avenue\nCambridge\nMA\n02139-4307\nUnited States",
      "registrant_country": "United States",
      "abuse_handle": "MNS18-ARIN",
      "abuse_name": "MIT Network Security",
      "abuse_email": "[email protected]",
      "abuse_phone": "+1-617-324-1782",
      "abuse_address": "304 Vassar Street\r\nW92-167\nCambridge\nMA\n02139\nUnited States",
      "abuse_country": "United States",
      "admin_handle": "SILIS-ARIN",
      "admin_type": "individual",
      "admin_name": "Mark Silis",
      "admin_address": "304 Vassar Street\r\nW92-167\nCambridge\nMA\n02139\nUnited States",
      "admin_phone": "+1-617-324-5900",
      "admin_email": "[email protected]",
      "admin_country": "United States",
      "noc_handle": "",
      "allocated_at": null,
      "last_updated_at": "2010-09-28T07:36:02+08:00"
    }
  }
]

IP address to ASN data

GET /asn/ip/:ip

Example getting ASN data for Google Bot IP address 66.249.66.1

» REQUEST https://api.a1.io/asn/ip/66.249.66.1

GET /asn/ip/66.249.66.1 HTTP/1.1
Host: api.a1.io
Accept: application/json

« RESPONSE

HTTP/1.1 200 OK
Content-Type: application/json; charset=utf-8
Cache-Control: public, s-maxage=3600, max-age=600
Content-Type: application/json; charset=utf-8
Date: 

[
  {
  "input": "ip:66.249.66.1",
  "error": "",
  "asn": {
      "asn": 15169,
      "rir_url": "https://rdap.arin.net/registry/autnum/15169",
      "name": "GOOGLE",
      "handle": "AS15169",
      "domain": "google.com",
      "rir_name": "ARIN",
      "type": "",
      "country": "United States",
      "status": "active",
      "tech_handle": "ZG39-ARIN",
      "registrant_handle": "GOGL",
      "registrant_type": "org",
      "registrant_name": "Google LLC",
      "registrant_address": "1600 Amphitheatre Parkway\nMountain View\nCA\n94043\nUnited States",
      "registrant_country": "United States",
      "abuse_handle": "ABUSE5250-ARIN",
      "abuse_name": "Abuse",
      "abuse_email": "[email protected]",
      "abuse_phone": "+1-650-253-0000",
      "abuse_address": "1600 Amphitheatre Parkway\nMountain View\nCA\n94043\nUnited States",
      "abuse_country": "United States",
      "admin_handle": "ZG39-ARIN",
      "admin_type": "group",
      "admin_name": "Google LLC",
      "admin_address": "1600 Amphitheatre Parkway\nMountain View\nCA\n94043\nUnited States",
      "admin_phone": "+1-650-253-0000",
      "admin_email": "[email protected]",
      "admin_country": "United States",
      "noc_handle": "",
      "allocated_at": "2000-03-30T13:00:00+08:00",
      "last_updated_at": "2012-02-24T22:44:34+08:00"
    }
  }
]

Company name to ASN data

GET /asn/org/:name

Example getting ASN data for Palantir Technology Inc.

» REQUEST https://api.a1.io/asn/org/palantir

GET /asn/org/palantir HTTP/1.1
Host: api.a1.io
Accept: application/json

« RESPONSE

HTTP/1.1 200 OK
Content-Type: application/json; charset=utf-8
Cache-Control: public, s-maxage=3600, max-age=600
Content-Type: application/json; charset=utf-8
Date: 

[
  {
  "input": "name:palantir",
  "error": "",
  "asn": {
      "asn": 22003,
      "name": "PT-ASN",
      "handle": "AS22003",
      "domain": "palantir.com",
      "rir_name": "ARIN",
      "type": "",
      "country": "United States",
      "status": "active",
      "tech_handle": "NETWO4587-ARIN",
      "registrant_handle": "PT",
      "registrant_name": "PALANTIR TECHNOLOGIES INC.",
      "registrant_address": "100 Hamilton Ave\r\nSuite 300\nPalo Alto\nCA\n94301\nUnited States",
      "registrant_country": "United States",
      "abuse_handle": "SECUR170-ARIN",
      "abuse_name": "Security Team",
      "abuse_email": "[email protected]",
      "abuse_phone": "+1-650-815-0200",
      "abuse_address": "100 Hamilton Ave\nPalo Alto\nCA\n94301\nUnited States",
      "abuse_country": "United States",
      "admin_handle": "NETWO4587-ARIN",
      "noc_handle": "",
      "allocated_at": "2010-11-09T03:33:47+08:00",
      "last_updated_at": "2012-02-24T22:44:34+08:00"
    }
  }
]

Domain to ASN data

GET /asn/domain/:domain

Example getting ASN data for nasa.gov

This endpoint will lookup the A and AAAA DNS records for the domain, and fetch ASN data for all of them. The `input` value will be each resolved IP address. It is common for all IPs to belong to the same ASN.

» REQUEST https://api.a1.io/asn/domain/nasa.gov

GET /asn/domain/nasa.gov HTTP/1.1
Host: api.a1.io
Accept: application/json

« RESPONSE

HTTP/1.1 200 OK
Content-Type: application/json; charset=utf-8
Cache-Control: public, s-maxage=3600, max-age=600
Content-Type: application/json; charset=utf-8
Date: 

[
  {
    "input": "domain:nasa.gov/52.0.14.116",
    "asn": {
      "asn": 14618,
      "rir_url": "https://rdap.arin.net/registry/autnum/14618",
      "name": "AMAZON-AES",
      "handle": "AS14618",
      "domain": "amazon.com",
      "rir_name": "ARIN",
      "type": "",
      "country": "United States",
      "status": "active",
      "tech_handle": "ANO24-ARIN",
      "registrant_handle": "AMAZO-4",
      "registrant_type": "org",
      "registrant_name": "Amazon.com, Inc.",
      "registrant_address": "Amazon Web Services, Inc.\r\nP.O. Box 81226\nSeattle\nWA\n98108-1226\nUnited States",
      "registrant_country": "United States",
      "abuse_handle": "AEA8-ARIN",
      "abuse_name": "Amazon EC2 Abuse",
      "abuse_email": "[email protected]",
      "abuse_phone": "+1-206-555-0000",
      "abuse_address": "Amazon Web Services Elastic Compute Cloud, EC2\n410 Terry Avenue North\nSeattle\nWA\n98109-5210\nUnited States",
      "abuse_country": "United States",
      "admin_handle": "IPMAN40-ARIN",
      "admin_type": "group",
      "admin_name": "IP Management",
      "admin_address": "1918 8th Ave\nSeattle\nWA\n98109\nUnited States",
      "admin_phone": "+1-703-464-1336",
      "admin_email": "[email protected]",
      "admin_country": "United States",
      "noc_handle": "",
      "allocated_at": "2005-11-05T03:16:14+08:00",
      "last_updated_at": "2012-03-02T21:03:18+08:00"
    },
    "error": ""
  },
  {
    "input": "domain:nasa.gov/23.22.39.120",
    "asn": {
      "asn": 14618,
      "rir_url": "https://rdap.arin.net/registry/autnum/14618",
      "name": "AMAZON-AES",
      "handle": "AS14618",
      "domain": "amazon.com",
      "rir_name": "ARIN",
      "type": "",
      "country": "United States",
      "status": "active",
      "tech_handle": "ANO24-ARIN",
      "registrant_handle": "AMAZO-4",
      "registrant_type": "org",
      "registrant_name": "Amazon.com, Inc.",
      "registrant_address": "Amazon Web Services, Inc.\r\nP.O. Box 81226\nSeattle\nWA\n98108-1226\nUnited States",
      "registrant_country": "United States",
      "abuse_handle": "AEA8-ARIN",
      "abuse_name": "Amazon EC2 Abuse",
      "abuse_email": "[email protected]",
      "abuse_phone": "+1-206-555-0000",
      "abuse_address": "Amazon Web Services Elastic Compute Cloud, EC2\n410 Terry Avenue North\nSeattle\nWA\n98109-5210\nUnited States",
      "abuse_country": "United States",
      "admin_handle": "IPMAN40-ARIN",
      "admin_type": "group",
      "admin_name": "IP Management",
      "admin_address": "1918 8th Ave\nSeattle\nWA\n98109\nUnited States",
      "admin_phone": "+1-703-464-1336",
      "admin_email": "[email protected]",
      "admin_country": "United States",
      "noc_handle": "",
      "allocated_at": "2005-11-05T03:16:14+08:00",
      "last_updated_at": "2012-03-02T21:03:18+08:00"
    },
    "error": ""
  },
  {
    "input": "domain:nasa.gov/2600:1f18:1f:db00:807b:f1f4:d01b:30b1",
    "asn": {
      "asn": 14618,
      "rir_url": "https://rdap.arin.net/registry/autnum/14618",
      "name": "AMAZON-AES",
      "handle": "AS14618",
      "domain": "amazon.com",
      "rir_name": "ARIN",
      "type": "",
      "country": "United States",
      "status": "active",
      "tech_handle": "ANO24-ARIN",
      "registrant_handle": "AMAZO-4",
      "registrant_type": "org",
      "registrant_name": "Amazon.com, Inc.",
      "registrant_address": "Amazon Web Services, Inc.\r\nP.O. Box 81226\nSeattle\nWA\n98108-1226\nUnited States",
      "registrant_country": "United States",
      "abuse_handle": "AEA8-ARIN",
      "abuse_name": "Amazon EC2 Abuse",
      "abuse_email": "[email protected]",
      "abuse_phone": "+1-206-555-0000",
      "abuse_address": "Amazon Web Services Elastic Compute Cloud, EC2\n410 Terry Avenue North\nSeattle\nWA\n98109-5210\nUnited States",
      "abuse_country": "United States",
      "admin_handle": "IPMAN40-ARIN",
      "admin_type": "group",
      "admin_name": "IP Management",
      "admin_address": "1918 8th Ave\nSeattle\nWA\n98109\nUnited States",
      "admin_phone": "+1-703-464-1336",
      "admin_email": "[email protected]",
      "admin_country": "United States",
      "noc_handle": "",
      "allocated_at": "2005-11-05T03:16:14+08:00",
      "last_updated_at": "2012-03-02T21:03:18+08:00"
    },
    "error": ""
  },
  {
    "input": "domain:nasa.gov/2600:1f18:1f:db01:11af:58af:ae11:f645",
    "asn": {
      "asn": 14618,
      "rir_url": "https://rdap.arin.net/registry/autnum/14618",
      "name": "AMAZON-AES",
      "handle": "AS14618",
      "domain": "amazon.com",
      "rir_name": "ARIN",
      "type": "",
      "country": "United States",
      "status": "active",
      "tech_handle": "ANO24-ARIN",
      "registrant_handle": "AMAZO-4",
      "registrant_type": "org",
      "registrant_name": "Amazon.com, Inc.",
      "registrant_address": "Amazon Web Services, Inc.\r\nP.O. Box 81226\nSeattle\nWA\n98108-1226\nUnited States",
      "registrant_country": "United States",
      "abuse_handle": "AEA8-ARIN",
      "abuse_name": "Amazon EC2 Abuse",
      "abuse_email": "[email protected]",
      "abuse_phone": "+1-206-555-0000",
      "abuse_address": "Amazon Web Services Elastic Compute Cloud, EC2\n410 Terry Avenue North\nSeattle\nWA\n98109-5210\nUnited States",
      "abuse_country": "United States",
      "admin_handle": "IPMAN40-ARIN",
      "admin_type": "group",
      "admin_name": "IP Management",
      "admin_address": "1918 8th Ave\nSeattle\nWA\n98109\nUnited States",
      "admin_phone": "+1-703-464-1336",
      "admin_email": "[email protected]",
      "admin_country": "United States",
      "noc_handle": "",
      "allocated_at": "2005-11-05T03:16:14+08:00",
      "last_updated_at": "2012-03-02T21:03:18+08:00"
    },
    "error": ""
  }
]

Whois email domain to ASN data

GET /asn/whois-email/@:domain

Example fetching all ASN for registred with an @princeton.edu email address

This endpoint will query against the registrant, admin and abuse contact email address's domain.

» REQUEST https://api.a1.io/asn/whois-email/@princeton.edu

GET /asn/whois-email/@princeton.edu HTTP/1.1
Host: api.a1.io
Accept: application/json

« RESPONSE

HTTP/1.1 200 OK
Content-Type: application/json; charset=utf-8
Cache-Control: public, s-maxage=3600, max-age=600
Content-Type: application/json; charset=utf-8
Date: 

[
  {
    "input": "whois-email:@princeton.edu",
    "asn": {
      "asn": 88,
      "rir_url": "https://rdap.arin.net/registry/autnum/88",
      "name": "PRINCETON-AS",
      "handle": "AS88",
      "domain": "princeton.edu",
      "rir_name": "ARIN",
      "type": "",
      "country": "United States",
      "status": "active",
      "tech_handle": "CINN-ARIN",
      "registrant_handle": "PRNU-Z",
      "registrant_type": "org",
      "registrant_name": "Princeton University",
      "registrant_address": "OIT Network Switching and Routing\n701 Carnegie Center, Suite 301\nPrinceton\nNJ\n08540\nUnited States",
      "registrant_country": "United States",
      "abuse_handle": "ABUSE16-ARIN",
      "abuse_name": "OIT Response Team",
      "abuse_email": "[email protected]",
      "abuse_phone": "+1-609-258-4357;extSay this concerns network abuse",
      "abuse_address": "Princeton University\r\n701 Carnegie Center, Suite 302\nPrinceton\nNJ\n08540\nUnited States",
      "abuse_country": "United States",
      "admin_handle": "CINN-ARIN",
      "admin_type": "group",
      "admin_name": "Contact for Internet numbers and names",
      "admin_address": "OIT Network Switching and Routing\n701 Carnegie Center, Suite 301\nPrinceton\nNJ\n08540\nUnited States",
      "admin_phone": "+1-609-258-4555",
      "admin_email": "[email protected]",
      "admin_country": "United States",
      "noc_handle": "",
      "allocated_at": "1986-10-10T12:00:00+08:00",
      "last_updated_at": "2021-09-25T00:46:07+08:00"
    },
    "error": ""
  },
  {
    "input": "whois-email:@princeton.edu",
    "asn": {
      "asn": 210934,
      "rir_url": "https://rdap.db.ripe.net/autnum/210934",
      "name": "YAOPEI-AS",
      "handle": "AS210934",
      "domain": "princeton.edu",
      "rir_name": "RIPE",
      "type": "",
      "country": "",
      "status": "active",
      "tech_handle": "YP931-RIPE",
      "registrant_handle": "RIPE-NCC-END-MNT",
      "abuse_handle": "YP932-RIPE",
      "abuse_name": "Joey Lee",
      "abuse_email": "[email protected]",
      "abuse_address": "12F A, Guomao Commercial Building, Nanhu Road, Nanhu Street, Luohu District, Shenzhen, China",
      "abuse_country": "China",
      "admin_handle": "YP931-RIPE",
      "noc_handle": "",
      "allocated_at": "2021-08-06T15:29:59+08:00",
      "last_updated_at": "2021-08-26T22:18:11+08:00"
    },
    "error": ""
  },
  {
    "input": "whois-email:@princeton.edu",
    "asn": {
      "asn": 400065,
      "rir_url": "https://rdap.arin.net/registry/autnum/400065",
      "name": "SCION-BACKBONE",
      "handle": "AS400065",
      "domain": "princeton.edu",
      "rir_name": "ARIN",
      "type": "",
      "country": "United States",
      "status": "active",
      "tech_handle": "CINN-ARIN",
      "registrant_handle": "PRNU",
      "registrant_type": "org",
      "registrant_name": "Princeton University",
      "registrant_address": "OIT Network Switching and Routing\n701 Carnegie Center, Suite 301\nPrinceton\nNJ\n08540\nUnited States",
      "registrant_country": "United States",
      "abuse_handle": "ABUSE16-ARIN",
      "abuse_name": "OIT Response Team",
      "abuse_email": "[email protected]",
      "abuse_phone": "+1-609-258-4357;extSay this concerns network abuse",
      "abuse_address": "Princeton University\r\n701 Carnegie Center, Suite 302\nPrinceton\nNJ\n08540\nUnited States",
      "abuse_country": "United States",
      "admin_handle": "CINN-ARIN",
      "admin_type": "group",
      "admin_name": "Contact for Internet numbers and names",
      "admin_address": "OIT Network Switching and Routing\n701 Carnegie Center, Suite 301\nPrinceton\nNJ\n08540\nUnited States",
      "admin_phone": "+1-609-258-4555",
      "admin_email": "[email protected]",
      "admin_country": "United States",
      "noc_handle": "",
      "allocated_at": "2021-09-22T22:44:42+08:00",
      "last_updated_at": "2021-11-22T22:02:09+08:00"
    },
    "error": ""
  }
]

Country code to ASN data

GET /asn/country/:country-code

Example fetching all ASN located in Zimbabwe

This endpoint will query against the ASN country when provided by the registry, and will fallback to the ASN registrant country when not found.

» REQUEST https://api.a1.io/asn/country/zw

GET /asn/country/zw HTTP/1.1
Host: api.a1.io
Accept: application/json

« RESPONSE

HTTP/1.1 200 OK
Content-Type: application/json; charset=utf-8
Cache-Control: public, s-maxage=3600, max-age=600
Content-Type: application/json; charset=utf-8
Date: 

[
  {
    "input": "country:zw",
    "asn": {
      "asn": 18922,
      "name": "ORG-AOZ1-AFRINIC",
      "handle": "AS18922",
      "domain": "dandemutande.co.zw",
      "rir_name": "AFRINIC",
      "type": "",
      "country": "Zimbabwe",
      "status": "active",
      "tech_handle": "CM86-AFRINIC",
      "registrant_handle": "ORG-AOZ1-AFRINIC",
      "registrant_name": "AFRICA ONLINE ZIMBABWE",
      "registrant_email": "[email protected]",
      "registrant_phone": "tel:+263-242791675",
      "registrant_address": "Level 9, Pegasus Building\n52-54 Samora Machel Ave\nHarare\nZimbabwe",
      "registrant_country": "Zimbabwe",
      "abuse_handle": "",
      "admin_handle": "CM86-AFRINIC",
      "noc_handle": "",
      "allocated_at": "2005-02-21T23:31:00+08:00",
      "last_updated_at": "2022-11-24T20:21:00+08:00"
    },
    "error": ""
  },
  {
    "input": "country:zw",
    "asn": {
      "asn": 37204,
      "name": "ORG-TPL1-AFRINIC",
      "handle": "AS37204",
      "domain": "telone.co.zw",
      "rir_name": "AFRINIC",
      "type": "",
      "country": "Zimbabwe",
      "status": "active",
      "tech_handle": "PC21-AFRINIC",
      "registrant_handle": "ORG-TPL1-AFRINIC",
      "registrant_name": "Telone PVT Ltd",
      "registrant_email": "[email protected]",
      "registrant_phone": "tel:+263-4-792-272",
      "registrant_address": "Telone HQ\n107 Kwame Nkruma Ave\nHarare, Zimbabwe",
      "registrant_country": "Zimbabwe",
      "abuse_handle": "",
      "admin_handle": "TC6-AFRINIC",
      "noc_handle": "",
      "allocated_at": "2010-04-16T20:38:00+08:00",
      "last_updated_at": "2023-07-11T05:54:00+08:00"
    },
    "error": ""
  }
]

ASN to IP ranges

GET /asn/:asn/prefixes

Example fetching all IP ranges for the MIT under their AS3

IP ranges are also called prefixes, routes or netblocks. These ranges are announced by BGP routers, which call them prefixes.

Append `.csv` to this endpoint to get a response in CSV format. Each route’ RPKI validity is included when available.

» REQUEST https://api.a1.io/asn/AS3/prefixes

GET /asn/AS3/prefixes HTTP/1.1
Host: api.a1.io
Accept: application/json

« RESPONSE

HTTP/1.1 200 OK
Content-Type: application/json; charset=utf-8
Cache-Control: public, s-maxage=3600, max-age=600
Content-Type: application/json; charset=utf-8
Date: 

[
  {
    "netblock": "128.30.0.0/15",
    "name": "NET128",
    "company_name": "Various Registries (Maintained by ARIN)",
    "registry": "ARIN",
    "ip_count": 131070,
    "ip_version": 4,
    "visibility": 100,
    "country": "United States",
    "domain": "example.com",
    "roa_validity": "not-found"
  },
  {
    "netblock": "18.0.0.0/16",
    "name": "MIT",
    "company_name": "Massachusetts Institute of Technology",
    "registry": "ARIN",
    "ip_count": 65534,
    "ip_version": 4,
    "visibility": 100,
    "country": "United States",
    "domain": "mit.edu",
    "roa_validity": "not-found"
  },
  {
    "netblock": "18.1.0.0/16",
    "name": "MIT",
    "company_name": "Massachusetts Institute of Technology",
    "registry": "ARIN",
    "ip_count": 65534,
    "ip_version": 4,
    "visibility": 100,
    "country": "United States",
    "domain": "mit.edu",
    "roa_validity": "not-found"
  },
  {
    "netblock": "18.3.0.0/16",
    "name": "MIT",
    "company_name": "Massachusetts Institute of Technology",
    "registry": "ARIN",
    "ip_count": 65534,
    "ip_version": 4,
    "visibility": 100,
    "country": "United States",
    "domain": "mit.edu",
    "roa_validity": "not-found"
  },
  {
    "netblock": "18.4.0.0/16",
    "name": "MIT",
    "company_name": "Massachusetts Institute of Technology",
    "registry": "ARIN",
    "ip_count": 65534,
    "ip_version": 4,
    "visibility": 100,
    "country": "United States",
    "domain": "mit.edu",
    "roa_validity": "not-found"
  },
  // A lot more...
]

Your current IP to ASN data

GET /asn/me

Return the ASN data for the IP address you are connecting from

This will most likely return your ISP ASN if you query from home, your VPN provider ASN, or your cloud provider’ if queried from your online server.

» REQUEST https://api.a1.io/asn/me

GET /asn/me HTTP/1.1
Host: api.a1.io
Accept: application/json

« RESPONSE

HTTP/1.1 200 OK
Content-Type: application/json; charset=utf-8
Cache-Control: public, s-maxage=3600, max-age=600
Content-Type: application/json; charset=utf-8
Date: 

[
  {
    "input": "ip:197.214.88.42",
    "asn": {
      "asn": 37559,
      "rir_url": "https://rdap.afrinic.net/rdap/autnum/AS37559",
      "name": "ORG-OB4-AFRINIC",
      "handle": "AS37559",
      "domain": "orange.com",
      "rir_name": "AFRINIC",
      "type": "",
      "country": "",
      "status": "active",
      "tech_handle": "PM60-AFRINIC",
      "registrant_handle": "ORG-OB4-AFRINIC",
      "registrant_type": "org",
      "registrant_name": "Orange Bissau",
      "registrant_email": "[email protected]",
      "registrant_phone": "tel:+245-955-603-030",
      "registrant_address": "Praca dos Herois Nacionais\nBP 1087 Bissau\nBissau",
      "abuse_handle": "",
      "admin_handle": "HC20-AFRINIC",
      "admin_type": "individual",
      "admin_name": "Hervé CLEMENT",
      "admin_address": "Orange Gardens\n44 Avenue de la République\nCS 50010\n92326 Chatillon Cedex – France",
      "admin_phone": "tel:+33-1-57-39-77-97",
      "admin_email": "[email protected]",
      "admin_country": "France",
      "noc_handle": "",
      "allocated_at": "2013-02-15T21:24:00+08:00",
      "last_updated_at": "2019-07-01T18:32:00+08:00"
    }
    "error": ""
  }
]

Remarks:

Batch queries are possible. Separate inputs with a comma. Example:
api.a1.io/asn/AS3,AS5,AS13335
A maximum of 50 results per query is returned. Get in touch for more »

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