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
AS21554
CYBERLYNK - Wisconsin CyberLynk Network, Inc. Announcing routesAS nameCYBERLYNK
OrganisationWisconsin CyberLynk Network, Inc.
Registry (RIR)ARIN
HandleAS21554
RangeAS21554
Registered23 May 2001
Last changed02 Mar 2012
Abuse contact[email protected]
62IPv4 prefixes
2IPv6 prefixes
6Upstreams
1Downstreams
Upstreams
| AS | Network name | Visibility |
|---|---|---|
| AS174 | COGENT-174 - Cogent Communications, LLC | 282 |
| AS2914 | NTT-DATA-2914 - NTT America, Inc. | 253 |
| AS30517 | GREAT-LAKES-COMNET - Great Lakes Comnet, Inc. | 252 |
| AS3356 | LEVEL3 - Level 3 Parent, LLC | 212 |
| AS40264 | TWC-40264-WI-MN-UPPERMI-C3 - Charter Communications LLC | 210 |
| AS7018 | ATT-INTERNET4 - AT&T Enterprises, LLC | 14 |
Downstreams
| AS | Network name | Visibility |
|---|---|---|
| AS54110 | CLEARLYIP1 - Modulis | 248 |
IPv4 prefixes (62)
38.23.54.0/2438.23.62.0/2438.23.39.0/2438.23.34.0/2438.23.44.0/2438.23.57.0/2438.39.178.0/2438.23.53.0/24199.248.63.0/24162.252.208.0/2238.23.40.0/2438.39.186.0/2438.23.35.0/2438.39.191.0/2438.23.48.0/2438.23.59.0/2438.39.182.0/2438.23.43.0/24209.236.224.0/2038.23.55.0/2438.23.56.0/2438.39.187.0/2438.23.32.0/2438.23.38.0/2438.23.61.0/2438.39.176.0/2038.23.42.0/2438.39.188.0/2438.39.177.0/24199.102.236.0/2238.23.63.0/2438.39.183.0/24199.38.80.0/21199.195.144.0/2238.39.189.0/2466.185.16.0/2038.39.180.0/2438.39.181.0/2438.23.60.0/2438.23.37.0/2438.23.41.0/2438.23.36.0/24162.221.88.0/2138.23.45.0/2438.39.176.0/2438.23.47.0/2438.23.46.0/2438.23.32.0/19162.217.84.0/22198.206.132.0/2238.39.190.0/2438.23.51.0/2438.23.33.0/2438.23.52.0/24192.159.64.0/22162.255.16.0/2238.23.58.0/2438.39.179.0/2438.23.50.0/2438.39.184.0/2438.23.49.0/2438.39.185.0/24
IPv6 prefixes (2)
RPKI-validate all prefixes of AS21554
Contacts
| Role | Name | Handle | Email / phone | Address |
|---|---|---|---|---|
| registrant | Wisconsin CyberLynk Network, Inc. | WCNI | 10125 S 52nd Street, Franklin, WI, 53132, United States | |
| abuse | Abuse Team | ABUSE76-ARIN | [email protected], +1-414-858-9335, +1-414-858-9336 | 10125 S 52nd Street, Franklin, WI, 53132, United States |
| administrative, noc, technical | CyberLynk NOC | CYBER1-ARIN | [email protected], +1-414-858-9335, +1-414-858-9336 | 10125 S 52nd Street, Franklin, WI, 53132, United States |
| technical, routing, noc, dns | Daniel Edmund Wimmer | DEW40-ARIN | [email protected], +1-414-858-9335;ext8122 | 10125 S 52nd St, Franklin, WI, 53132, United States |
| abuse | Abuse Team | ABUSE76-ARIN | [email protected], +1-414-858-9335, +1-414-858-9336 | 10125 S 52nd Street, Franklin, WI, 53132, United States |
| technical, noc | CyberLynk NOC | CYBER1-ARIN | [email protected], +1-414-858-9335, +1-414-858-9336 | 10125 S 52nd Street, Franklin, WI, 53132, United States |
Raw registry response
{
"endAutnum": 21554,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-06-30T08:57:55-04:00"
},
{
"eventAction": "registration",
"eventDate": "2002-10-21T18:45:13-04:00"
}
],
"handle": "ABUSE76-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ABUSE76-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/21554"
},
{
"href": "https://whois.arin.net/rest/poc/ABUSE76-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/21554"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "10125 S 52nd Street\nFranklin\nWI\n53132\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Abuse Team"
],
[
"org",
[],
"text",
"Wisconsin CyberLynk Network, Inc."
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-414-858-9335"
],
[
"tel",
{
"type": [
"work",
"fax"
]
},
"text",
"+1-414-858-9336"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-04-01T09:29:12-04:00"
},
{
"eventAction": "registration",
"eventDate": "2002-10-21T18:45:14-04:00"
}
],
"handle": "CYBER1-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/CYBER1-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/21554"
},
{
"href": "https://whois.arin.net/rest/poc/CYBER1-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/21554"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative",
"noc",
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "10125 S 52nd Street\nFranklin\nWI\n53132\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"CyberLynk NOC"
],
[
"org",
[],
"text",
"Wisconsin CyberLynk Network, Inc."
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-414-858-9335"
],
[
"tel",
{
"type": [
"work",
"fax"
]
},
"text",
"+1-414-858-9336"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-01-12T09:33:04-05:00"
},
{
"eventAction": "registration",
"eventDate": "2024-01-11T13:21:47-05:00"
}
],
"handle": "DEW40-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/DEW40-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/21554"
},
{
"href": "https://whois.arin.net/rest/poc/DEW40-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/21554"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical",
"routing",
"noc",
"dns"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "10125 S 52nd St\nFranklin\nWI\n53132\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Daniel Edmund Wimmer"
],
[
"n",
[],
"text",
[
"Wimmer",
"Daniel",
"Edmund",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-414-858-9335;ext8122"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2024-04-24T17:10:17-04:00"
},
{
"eventAction": "registration",
"eventDate": "1996-12-02T00:00:00-05:00"
}
],
"handle": "WCNI",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/WCNI",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/21554"
},
{
"href": "https://whois.arin.net/rest/org/WCNI",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/21554"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"http://www.cyberlynk.net\r",
"Email: [email protected]"
],
"title": "Registration Comments"
}
],
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"Wisconsin CyberLynk Network, Inc."
],
[
"adr",
{
"label": "10125 S 52nd Street\nFranklin\nWI\n53132\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
[],
"text",
"org"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-06-30T08:57:55-04:00"
},
{
"eventAction": "registration",
"eventDate": "2002-10-21T18:45:13-04:00"
}
],
"handle": "ABUSE76-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ABUSE76-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/21554"
},
{
"href": "https://whois.arin.net/rest/poc/ABUSE76-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/21554"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "10125 S 52nd Street\nFranklin\nWI\n53132\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Abuse Team"
],
[
"org",
[],
"text",
"Wisconsin CyberLynk Network, Inc."
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-414-858-9335"
],
[
"tel",
{
"type": [
"work",
"fax"
]
},
"text",
"+1-414-858-9336"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-04-01T09:29:12-04:00"
},
{
"eventAction": "registration",
"eventDate": "2002-10-21T18:45:14-04:00"
}
],
"handle": "CYBER1-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/CYBER1-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/21554"
},
{
"href": "https://whois.arin.net/rest/poc/CYBER1-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/21554"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical",
"noc"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "10125 S 52nd Street\nFranklin\nWI\n53132\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"CyberLynk NOC"
],
[
"org",
[],
"text",
"Wisconsin CyberLynk Network, Inc."
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-414-858-9335"
],
[
"tel",
{
"type": [
"work",
"fax"
]
},
"text",
"+1-414-858-9336"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2012-03-02T08:03:18-05:00"
},
{
"eventAction": "registration",
"eventDate": "2001-05-23T00:00:00-04:00"
}
],
"handle": "AS21554",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/21554",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/21554"
},
{
"href": "https://whois.arin.net/rest/asn/AS21554",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/21554"
}
],
"name": "CYBERLYNK",
"notices": [
{
"description": [
"By using the ARIN RDAP/Whois service, you are agreeing to the RDAP/Whois Terms of Use"
],
"links": [
{
"href": "https://www.arin.net/resources/registry/whois/tou/",
"rel": "terms-of-service",
"type": "text/html",
"value": "https://rdap.arin.net/registry/autnum/21554"
}
],
"title": "Terms of Service"
},
{
"description": [
"If you see inaccuracies in the results, please visit: "
],
"links": [
{
"href": "https://www.arin.net/resources/registry/whois/inaccuracy_reporting/",
"rel": "inaccuracy-report",
"type": "text/html",
"value": "https://rdap.arin.net/registry/autnum/21554"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "autnum",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"nro_rdap_profile_asn_flat_0"
],
"remarks": [
{
"description": [
"http://www.CyberLynk.net"
],
"title": "Registration Comments"
}
],
"startAutnum": 21554,
"status": [
"active"
]
}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.