Free network tools
AS WHOIS
Look up an Autonomous System — holder, registry, contacts, announced IPv4/IPv6 prefixes, upstreams and downstreams.
Network Report (All-in-one) BGP Looking Glass BGP Security Check RPKI Validator BGP Hijack & Leak Monitor ASN Intelligence Internet Outages & Anomalies Country Internet Report Domain Insights IP WHOIS AS WHOIS
AS18092
CSF - Kyushu Tele Communications Company Announcing routesAS nameCSF
CountryJP
Registry (RIR)APNIC
HandleAS18092
RangeAS18092
Registered—
Last changed15 Jul 2005
Abuse contact[email protected]
50IPv4 prefixes
1IPv6 prefixes
5Upstreams
1Downstreams
Upstreams
| AS | Network name | Visibility |
|---|---|---|
| AS2516 | KDDI - KDDI CORPORATION | 353 |
| AS4713 | OCN - NTT DOCOMO BUSINESS,Inc. | 183 |
| AS17676 | GIGAINFRA - SoftBank Corp. | 35 |
| AS6939 | HURRICANE - Hurricane Electric LLC | 24 |
| AS35280 | F5 F5 Networks SARL | 3 |
Downstreams
| AS | Network name | Visibility |
|---|---|---|
| AS45677 | ICV - Isahaya Cable Media Co.,Ltd | 168 |
IPv4 prefixes (50)
203.222.208.0/22123.242.210.0/24114.141.36.0/24202.126.240.0/22112.137.146.0/23203.222.214.0/2361.44.247.0/24203.222.216.0/22219.103.112.0/21120.50.168.0/22219.117.52.0/22202.126.248.0/22112.137.158.0/23202.126.244.0/23175.103.8.0/22202.126.240.0/2061.44.248.0/2161.44.243.0/2461.44.240.0/20114.141.32.0/21202.126.248.0/21110.172.40.0/21203.222.212.0/23203.222.220.0/22112.137.152.0/22112.137.144.0/23219.117.48.0/2061.44.236.0/22114.141.32.0/22123.242.208.0/2327.122.8.0/22112.137.152.0/2161.44.244.0/22110.172.32.0/20114.141.37.0/24112.137.144.0/2161.44.224.0/20203.222.208.0/20219.103.112.0/20203.205.96.0/20120.50.172.0/22112.137.144.0/20110.172.32.0/2161.44.240.0/23123.242.208.0/21202.126.247.0/24203.205.104.0/21203.205.96.0/21202.126.246.0/2461.44.234.0/23
IPv6 prefixes (1)
RPKI-validate all prefixes of AS18092
Contacts
| Role | Name | Handle | Email / phone | Address |
|---|---|---|---|---|
| administrative | NS1881JP | |||
| administrative, technical | Japan Network Information Center | JNIC1-AP | [email protected], +81-3-5297-2311, +81-3-5297-2312 | Uchikanda OS Bldg 4F, 2-12-6 Uchi-Kanda, Chiyoda-ku, Tokyo 101-0047, Japan |
| technical | HK5776JP | |||
| abuse | IRT-JPNIC-JP | IRT-JPNIC-JP | [email protected], [email protected], +81-3-5297-2311, +81-3-5297-2312 | Uchikanda OS Bldg 4F, 2-12-6 Uchi-Kanda, Chiyoda-ku, Tokyo 101-0047, japan |
Raw registry response
{
"rdapConformance": [
"nro_rdap_profile_0",
"nro_rdap_profile_asn_hierarchical_0",
"cidr0",
"rdap_level_0"
],
"notices": [
{
"title": "Source",
"description": [
"Objects returned came from source",
"JPNIC"
]
},
{
"title": "Terms and Conditions",
"description": [
"This is the APNIC WHOIS Database query service. The objects are in RDAP format.",
"This information has been partially mirrored by APNIC from JPNIC. To obtain more specific information, please use the JPNIC WHOIS Gateway at http://www.nic.ad.jp/en/db/whois/en-gateway.html or whois.nic.ad.jp for WHOIS client. (The WHOIS client defaults to Japanese output, use the /e switch for English output)"
],
"links": [
{
"value": "https://jpnic.rdap.apnic.net/autnum/18092",
"rel": "terms-of-service",
"href": "http://www.apnic.net/db/dbcopyright.html",
"type": "text/html"
}
]
},
{
"title": "Whois Inaccuracy Reporting",
"description": [
"If you see inaccuracies in the results, please visit: "
],
"links": [
{
"value": "https://jpnic.rdap.apnic.net/autnum/18092",
"rel": "inaccuracy-report",
"href": "https://www.apnic.net/manage-ip/using-whois/abuse-and-spamming/invalid-contact-form",
"type": "text/html"
}
]
}
],
"country": "JP",
"name": "CSF",
"status": [
"active"
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2005-07-14T19:43:59Z"
}
],
"links": [
{
"value": "https://jpnic.rdap.apnic.net/autnum/18092",
"rel": "self",
"href": "https://jpnic.rdap.apnic.net/autnum/18092",
"type": "application/rdap+json"
}
],
"remarks": [
{
"description": [
"Kyushu Tele Communications Company"
],
"title": "description"
}
],
"entities": [
{
"roles": [
"administrative"
],
"links": [
{
"value": "https://jpnic.rdap.apnic.net/autnum/18092",
"rel": "related",
"href": "http://whois.nic.ad.jp/cgi-bin/whois_gw?key=NS1881JP/e",
"type": "text/html",
"hreflang": "en"
},
{
"value": "https://jpnic.rdap.apnic.net/autnum/18092",
"rel": "related",
"href": "http://whois.nic.ad.jp/cgi-bin/whois_gw?key=NS1881JP",
"type": "text/html",
"hreflang": "jp"
}
],
"handle": "NS1881JP",
"objectClassName": "entity"
},
{
"roles": [
"administrative",
"technical"
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2022-01-05T03:04:02Z"
}
],
"links": [
{
"value": "https://jpnic.rdap.apnic.net/autnum/18092",
"rel": "self",
"href": "https://jpnic.rdap.apnic.net/entity/JNIC1-AP",
"type": "application/rdap+json"
}
],
"handle": "JNIC1-AP",
"objectClassName": "entity",
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"Japan Network Information Center"
],
[
"kind",
[],
"text",
"group"
],
[
"adr",
{
"label": "Uchikanda OS Bldg 4F, 2-12-6 Uchi-Kanda\nChiyoda-ku, Tokyo 101-0047, Japan"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+81-3-5297-2311"
],
[
"tel",
{
"type": "fax"
},
"text",
"+81-3-5297-2312"
],
[
"email",
[],
"text",
"[email protected]"
]
]
]
},
{
"roles": [
"technical"
],
"links": [
{
"value": "https://jpnic.rdap.apnic.net/autnum/18092",
"rel": "related",
"href": "http://whois.nic.ad.jp/cgi-bin/whois_gw?key=HK5776JP/e",
"type": "text/html",
"hreflang": "en"
},
{
"value": "https://jpnic.rdap.apnic.net/autnum/18092",
"rel": "related",
"href": "http://whois.nic.ad.jp/cgi-bin/whois_gw?key=HK5776JP",
"type": "text/html",
"hreflang": "jp"
}
],
"handle": "HK5776JP",
"objectClassName": "entity"
},
{
"roles": [
"abuse"
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-10-20T09:11:46Z"
}
],
"links": [
{
"value": "https://jpnic.rdap.apnic.net/autnum/18092",
"rel": "self",
"href": "https://jpnic.rdap.apnic.net/entity/IRT-JPNIC-JP",
"type": "application/rdap+json"
}
],
"remarks": [
{
"description": [
"[email protected] was validated on 2024-11-27"
],
"title": "remarks"
}
],
"handle": "IRT-JPNIC-JP",
"objectClassName": "entity",
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"IRT-JPNIC-JP"
],
[
"kind",
[],
"text",
"group"
],
[
"adr",
{
"label": "Uchikanda OS Bldg 4F, 2-12-6 Uchi-Kanda\nChiyoda-ku, Tokyo 101-0047, japan"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+81-3-5297-2311"
],
[
"tel",
{
"type": "fax"
},
"text",
"+81-3-5297-2312"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"email",
{
"pref": "1"
},
"text",
"[email protected]"
]
]
]
}
],
"handle": "AS18092",
"startAutnum": 18092,
"endAutnum": 18092,
"objectClassName": "autnum",
"port43": "whois.apnic.net"
}Results come from public internet registries and live global routing data. Results are cached for up to an hour. Lookups are logged with your IP address to prevent abuse — see our Privacy Policy.