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
AS394748
CITYOFFORTCOLLINS - City of Fort Collins Announcing routesAS nameCITYOFFORTCOLLINS
OrganisationCity of Fort Collins
Registry (RIR)ARIN
HandleAS394748
RangeAS394748
Registered15 Dec 2015
Last changed15 Dec 2015
Abuse contact[email protected]
3IPv4 prefixes
0IPv6 prefixes
1Upstreams
0Downstreams
Upstreams
| AS | Network name | Visibility |
|---|---|---|
| AS12145 | COLORADOSTATEUNIV - Colorado State University | 223 |
Downstreams
None seen.
IPv4 prefixes (3)
RPKI-validate all prefixes of AS394748
Contacts
| Role | Name | Handle | Email / phone | Address |
|---|---|---|---|---|
| registrant | City of Fort Collins | CFC | 700 Wood St, Fort Collins, CO, 80521, United States | |
| abuse | Fort Collins Connexion Abuse and DMCA Compliance | FCCADC-ARIN | [email protected], +1-970-207-7873 | PO Box 580, Fort Collins, CO, 80522-0580, United States |
| administrative, routing, technical, noc, dns | Fort Collins Connexion Network Engineering | FCCNE-ARIN | [email protected], +1-970-207-7873 | PO Box 580, Fort Collins, CO, 80522-0580, United States |
Raw registry response
{
"endAutnum": 394748,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-10-24T18:04:02-04:00"
},
{
"eventAction": "registration",
"eventDate": "2021-10-22T12:39:01-04:00"
}
],
"handle": "FCCADC-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/FCCADC-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/394748"
},
{
"href": "https://whois.arin.net/rest/poc/FCCADC-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/394748"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "PO Box 580\nFort Collins\nCO\n80522-0580\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Fort Collins Connexion Abuse and DMCA Compliance"
],
[
"org",
[],
"text",
"Fort Collins Connexion"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-970-207-7873"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-10-24T18:02:29-04:00"
},
{
"eventAction": "registration",
"eventDate": "2021-10-22T12:49:40-04:00"
}
],
"handle": "FCCNE-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/FCCNE-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/394748"
},
{
"href": "https://whois.arin.net/rest/poc/FCCNE-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/394748"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative",
"routing",
"technical",
"noc",
"dns"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "PO Box 580\nFort Collins\nCO\n80522-0580\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Fort Collins Connexion Network Engineering"
],
[
"org",
[],
"text",
"Fort Collins Connexion"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-970-207-7873"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2024-11-25T11:09:46-05:00"
},
{
"eventAction": "registration",
"eventDate": "1992-12-03T00:00:00-05:00"
}
],
"handle": "CFC",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/CFC",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/394748"
},
{
"href": "https://whois.arin.net/rest/org/CFC",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/394748"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"City of Fort Collins"
],
[
"adr",
{
"label": "700 Wood St\nFort Collins\nCO\n80521\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
[],
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2015-12-15T13:09:52-05:00"
},
{
"eventAction": "registration",
"eventDate": "2015-12-15T13:09:52-05:00"
}
],
"handle": "AS394748",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/394748",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/394748"
},
{
"href": "https://whois.arin.net/rest/asn/AS394748",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/394748"
}
],
"name": "CITYOFFORTCOLLINS",
"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/394748"
}
],
"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/394748"
}
],
"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"
],
"startAutnum": 394748,
"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.
