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
AS11501
VISTAASN - Vista Radiology, P.C. Announcing routesAS nameVISTAASN
OrganisationVista Radiology, P.C.
Registry (RIR)ARIN
HandleAS11501
RangeAS11501
Registered07 Mar 2007
Last changed02 Mar 2012
3IPv4 prefixes
0IPv6 prefixes
2Upstreams
0Downstreams
Upstreams
| AS | Network name | Visibility |
|---|---|---|
| AS12083 | WOW-INTERNET - WideOpenWest Finance LLC | 224 |
| AS174 | COGENT-174 - Cogent Communications, LLC | 210 |
Downstreams
None seen.
IPv4 prefixes (3)
RPKI-validate all prefixes of AS11501
Contacts
| Role | Name | Handle | Email / phone | Address |
|---|---|---|---|---|
| registrant | Vista Radiology, P.C. | VRP-2 | 2001 Laurel Ave, Suite 304, Knoxville, TN, 37916, United States | |
| administrative, abuse, technical | VRPC IT | VRPCI-ARIN | [email protected], [email protected], +1-865-595-4100 | 2001 Laurel Ave, Suite 304, Knoxville, TN, 37916, United States |
| technical | Mark Blackford | BLACK1042-ARIN | [email protected], +1-678-230-8769 | 256 Jocelyn Dr, Cottontown, TN, 37048, United States |
| technical | VRPC IT | VRPCI-ARIN | [email protected], [email protected], +1-865-595-4100 | 2001 Laurel Ave, Suite 304, Knoxville, TN, 37916, United States |
Raw registry response
{
"endAutnum": 11501,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-07-03T16:13:45-04:00"
},
{
"eventAction": "registration",
"eventDate": "2007-02-12T15:18:10-05:00"
}
],
"handle": "VRPCI-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/VRPCI-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11501"
},
{
"href": "https://whois.arin.net/rest/poc/VRPCI-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11501"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative",
"abuse",
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "2001 Laurel Ave\nSuite 304\nKnoxville\nTN\n37916\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"VRPC IT"
],
[
"org",
[],
"text",
"Vista Radiology, P.C."
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-865-595-4100"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-10-15T09:43:14-04:00"
},
{
"eventAction": "registration",
"eventDate": "2024-09-09T12:52:13-04:00"
}
],
"handle": "BLACK1042-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/BLACK1042-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11501"
},
{
"href": "https://whois.arin.net/rest/poc/BLACK1042-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11501"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "256 Jocelyn Dr\nCottontown\nTN\n37048\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Mark Blackford"
],
[
"n",
[],
"text",
[
"Blackford",
"Mark",
"",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-678-230-8769"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-02-19T11:49:26-05:00"
},
{
"eventAction": "registration",
"eventDate": "2007-02-13T09:13:38-05:00"
}
],
"handle": "VRP-2",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/VRP-2",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11501"
},
{
"href": "https://whois.arin.net/rest/org/VRP-2",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11501"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"Vista Radiology, P.C."
],
[
"adr",
{
"label": "2001 Laurel Ave\nSuite 304\nKnoxville\nTN\n37916\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
[],
"text",
"org"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-07-03T16:13:45-04:00"
},
{
"eventAction": "registration",
"eventDate": "2007-02-12T15:18:10-05:00"
}
],
"handle": "VRPCI-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/VRPCI-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11501"
},
{
"href": "https://whois.arin.net/rest/poc/VRPCI-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11501"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "2001 Laurel Ave\nSuite 304\nKnoxville\nTN\n37916\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"VRPC IT"
],
[
"org",
[],
"text",
"Vista Radiology, P.C."
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-865-595-4100"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2012-03-02T08:03:18-05:00"
},
{
"eventAction": "registration",
"eventDate": "2007-03-06T15:03:49-05:00"
}
],
"handle": "AS11501",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/11501",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11501"
},
{
"href": "https://whois.arin.net/rest/asn/AS11501",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11501"
}
],
"name": "VISTAASN",
"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/11501"
}
],
"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/11501"
}
],
"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": 11501,
"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.