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Look up an Autonomous System — holder, registry, contacts, announced IPv4/IPv6 prefixes, upstreams and downstreams.
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AS6200
UIC-AS - University of Illinois Chicago Announcing routesAS nameUIC-AS
OrganisationUniversity of Illinois Chicago
Registry (RIR)ARIN
HandleAS6200
RangeAS6200
Registered—
Last changed13 Apr 2024
Abuse contact[email protected]
7IPv4 prefixes
1IPv6 prefixes
4Upstreams
0Downstreams
Upstreams
| AS | Network name | Visibility |
|---|---|---|
| AS40387 | UI-ICCN - University of Illinois | 289 |
| AS396450 | INTERNET2-2 - Internet2 | 254 |
| AS22335 | MREN - Metropolitan Research and Education Network | 86 |
| AS6325 | ILLINOIS-CENTURY - Illinois Century Network | 5 |
Downstreams
None seen.
IPv4 prefixes (7)
IPv6 prefixes (1)
RPKI-validate all prefixes of AS6200
Contacts
| Role | Name | Handle | Email / phone | Address |
|---|---|---|---|---|
| registrant | University of Illinois Chicago | UIAC-Z | ACCC MC 135, 1940 West Taylor Avenue, Chicago, IL, 60612-7352, United States | |
| administrative, technical | Jelene Crehan | CREHA2-ARIN | [email protected], +1-312-355-3101, +1-312-996-6834 | Technology Solutions, 728 W. Roosevelt Rd, M/C 010, Chicago, IL, 60607, United States |
| technical, abuse | Esteban Perez | PEREZ906-ARIN | [email protected], +1-312-996-9221 | 728 West Roosevelt Rd, Chicago, IL, 60607, United States |
| technical | Paul Neumann | NEUMA73-ARIN | [email protected], +1-312-355-0113, +1-312-355-0113 | 728 W Roosevelt Rd, Chicago, IL, 60605, United States |
| technical | Charles Nutall | NUTAL1-ARIN | [email protected], +1-312-996-8972, +1-773-556-9914 | 728 West Roosevelt Rd., Chicago , IL, 60607, United States |
| technical | Jelene Crehan | CREHA2-ARIN | [email protected], +1-312-355-3101, +1-312-996-6834 | Technology Solutions, 728 W. Roosevelt Rd, M/C 010, Chicago, IL, 60607, United States |
| abuse, technical | Esteban Perez | PEREZ906-ARIN | [email protected], +1-312-996-9221 | 728 West Roosevelt Rd, Chicago, IL, 60607, United States |
| technical | William Marcyniuk | MARCY1-ARIN | [email protected], +1-312-996-1550, +1-312-996-6834 | ACCC MC 135 , 1940 W Taylor Rm 124, Chicago, IL, 60612, United States |
Raw registry response
{
"endAutnum": 6200,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-11-18T12:40:15-05:00"
},
{
"eventAction": "registration",
"eventDate": "2017-01-25T12:36:46-05:00"
}
],
"handle": "CREHA2-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/CREHA2-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/6200"
},
{
"href": "https://whois.arin.net/rest/poc/CREHA2-ARIN",
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"value": "https://rdap.arin.net/registry/autnum/6200"
}
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"objectClassName": "entity",
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{
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"eventDate": "2026-08-30T09:24:03-04:00"
},
{
"eventAction": "registration",
"eventDate": "2022-08-30T10:59:42-04:00"
}
],
"handle": "PEREZ906-ARIN",
"links": [
{
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"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/6200"
},
{
"href": "https://whois.arin.net/rest/poc/PEREZ906-ARIN",
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],
"objectClassName": "entity",
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{
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},
{
"eventAction": "registration",
"eventDate": "2024-06-05T10:05:47-04:00"
}
],
"handle": "NEUMA73-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/NEUMA73-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/6200"
},
{
"href": "https://whois.arin.net/rest/poc/NEUMA73-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/6200"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"ARIN has attempted to validate the data for this POC, but has received no response from the POC since 2025-06-05"
],
"title": "Unvalidated POC"
}
],
"roles": [
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],
"vcardArray": [
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},
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],
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]
],
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],
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},
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],
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{
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]
},
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},
{
"events": [
{
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"eventDate": "2024-06-05T13:43:01-04:00"
},
{
"eventAction": "registration",
"eventDate": "2024-06-05T13:43:01-04:00"
}
],
"handle": "NUTAL1-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/NUTAL1-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/6200"
},
{
"href": "https://whois.arin.net/rest/poc/NUTAL1-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/6200"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"ARIN has attempted to validate the data for this POC, but has received no response from the POC since 2025-06-05"
],
"title": "Unvalidated POC"
}
],
"roles": [
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],
"vcardArray": [
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[
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"version",
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],
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},
"text",
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]
],
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"fn",
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]
],
[
"kind",
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"individual"
],
[
"email",
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"text",
"[email protected]"
],
[
"tel",
{
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]
},
"text",
"+1-312-996-8972"
],
[
"tel",
{
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]
},
"text",
"+1-773-556-9914"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-05-01T10:57:24-04:00"
},
{
"eventAction": "registration",
"eventDate": "2023-02-01T19:37:03-05:00"
}
],
"handle": "UIAC-Z",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/UIAC-Z",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/6200"
},
{
"href": "https://whois.arin.net/rest/org/UIAC-Z",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/6200"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
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],
"vcardArray": [
"vcard",
[
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],
[
"fn",
[],
"text",
"University of Illinois Chicago"
],
[
"adr",
{
"label": "ACCC MC 135\n1940 West Taylor Avenue\nChicago\nIL\n60612-7352\nUnited States"
},
"text",
[
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]
],
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},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-11-18T12:40:15-05:00"
},
{
"eventAction": "registration",
"eventDate": "2017-01-25T12:36:46-05:00"
}
],
"handle": "CREHA2-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/CREHA2-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/6200"
},
{
"href": "https://whois.arin.net/rest/poc/CREHA2-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/6200"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "Technology Solutions\n728 W. Roosevelt Rd, M/C 010\nChicago\nIL\n60607\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Jelene Crehan"
],
[
"n",
[],
"text",
[
"Crehan",
"Jelene",
"",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-312-355-3101"
],
[
"tel",
{
"type": [
"work",
"fax"
]
},
"text",
"+1-312-996-6834"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-08-30T09:24:03-04:00"
},
{
"eventAction": "registration",
"eventDate": "2022-08-30T10:59:42-04:00"
}
],
"handle": "PEREZ906-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/PEREZ906-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/6200"
},
{
"href": "https://whois.arin.net/rest/poc/PEREZ906-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/6200"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"abuse",
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "728 West Roosevelt Rd\nChicago\nIL\n60607\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Esteban Perez"
],
[
"n",
[],
"text",
[
"Perez",
"Esteban",
"",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-312-996-9221"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2024-03-06T10:48:20-05:00"
},
{
"eventAction": "registration",
"eventDate": "2012-06-01T15:16:28-04:00"
}
],
"handle": "MARCY1-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/MARCY1-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/6200"
},
{
"href": "https://whois.arin.net/rest/poc/MARCY1-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/6200"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"ARIN has attempted to validate the data for this POC, but has received no response from the POC since 2025-03-06"
],
"title": "Unvalidated POC"
}
],
"roles": [
"technical"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "ACCC MC 135\r\n1940 W Taylor Rm 124\nChicago\nIL\n60612\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"William Marcyniuk"
],
[
"n",
[],
"text",
[
"Marcyniuk",
"William",
"",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-312-996-1550"
],
[
"tel",
{
"type": [
"work",
"fax"
]
},
"text",
"+1-312-996-6834"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2024-04-12T17:23:45-04:00"
}
],
"handle": "AS6200",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/6200",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/6200"
},
{
"href": "https://whois.arin.net/rest/asn/AS6200",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/6200"
}
],
"name": "UIC-AS",
"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/6200"
}
],
"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/6200"
}
],
"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": 6200,
"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.