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
AS34
UDELNET - University of Delaware Announcing routesAS nameUDELNET
OrganisationUniversity of Delaware
Registry (RIR)ARIN
HandleAS34
RangeAS34
Registered03 Oct 1984
Last changed09 Nov 2023
2IPv4 prefixes
1IPv6 prefixes
5Upstreams
1Downstreams
Upstreams
| AS | Network name | Visibility |
|---|---|---|
| AS33287 | COMCAST-33287 - Comcast Cable Communications, LLC | 578 |
| AS174 | COGENT-174 - Cogent Communications, LLC | 271 |
| AS33659 | CMCS - Comcast Cable Communications, LLC | 105 |
| AS3754 | NYSERNET3-AS - NYSERNet | 29 |
| AS3630 | NYSERNET-BLK - NYSERNet | 6 |
Downstreams
| AS | Network name | Visibility |
|---|---|---|
| AS2 | UDEL-DCN - University of Delaware | 256 |
IPv4 prefixes (2)
IPv6 prefixes (1)
RPKI-validate all prefixes of AS34
Contacts
| Role | Name | Handle | Email / phone | Address |
|---|---|---|---|---|
| registrant | University of Delaware | UNIVER-19-Z | Information Technologies, 192 South Chapel Street, Newark, DE, 19716, United States | |
| technical, routing | Network and Systems Services | NSS13-ARIN | [email protected], [email protected], +1-302-831-6000 | 192 South Chapel Street, Newark, DE, 19716, United States |
| abuse, noc, dns | UDel NOC | UDELN-ARIN | [email protected], +1-302-831-6000, +1-302-831-3717 | Information Technologies, Newark, DE, 19716, United States |
| administrative | Michael DAvis | DAVIS2708-ARIN | [email protected], +1-302-831-6006 | 192 S. Chapel St, Newark, DE, 19716, United States |
| dns, noc, abuse, technical, routing | Scott Huffman | HUFFM208-ARIN | [email protected], +1-302-831-7377 | 192 South Chapel Street, Newark, DE, 19716, United States |
Raw registry response
{
"endAutnum": 34,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-06-28T14:54:29-04:00"
},
{
"eventAction": "registration",
"eventDate": "2010-06-15T07:43:46-04:00"
}
],
"handle": "NSS13-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/NSS13-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/34"
},
{
"href": "https://whois.arin.net/rest/poc/NSS13-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/34"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical",
"routing"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "192 South Chapel Street\nNewark\nDE\n19716\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Network and Systems Services"
],
[
"org",
[],
"text",
"University of Delaware"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-302-831-6000"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-01-10T08:34:25-05:00"
},
{
"eventAction": "registration",
"eventDate": "2009-08-07T07:54:03-04:00"
}
],
"handle": "UDELN-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/UDELN-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/34"
},
{
"href": "https://whois.arin.net/rest/poc/UDELN-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/34"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"abuse",
"noc",
"dns"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "Information Technologies\nNewark\nDE\n19716\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"UDel NOC"
],
[
"org",
[],
"text",
"University of Delaware"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-302-831-6000"
],
[
"tel",
{
"type": [
"work",
"fax"
]
},
"text",
"+1-302-831-3717"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-09-19T11:51:03-04:00"
},
{
"eventAction": "registration",
"eventDate": "2023-09-21T14:30:35-04:00"
}
],
"handle": "DAVIS2708-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/DAVIS2708-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/34"
},
{
"href": "https://whois.arin.net/rest/poc/DAVIS2708-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/34"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "192 S. Chapel St\nNewark\nDE\n19716\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Michael DAvis"
],
[
"n",
[],
"text",
[
"DAvis",
"Michael",
"",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-302-831-6006"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-07-23T15:38:08-04:00"
},
{
"eventAction": "registration",
"eventDate": "2026-07-23T15:38:08-04:00"
}
],
"handle": "HUFFM208-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/HUFFM208-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/34"
},
{
"href": "https://whois.arin.net/rest/poc/HUFFM208-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/34"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"dns",
"noc",
"abuse",
"technical",
"routing"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "192 South Chapel Street\nNewark\nDE\n19716\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Scott Huffman"
],
[
"n",
[],
"text",
[
"Huffman",
"Scott",
"",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-302-831-7377"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-07-30T11:54:01-04:00"
},
{
"eventAction": "registration",
"eventDate": "2008-03-18T13:19:36-04:00"
}
],
"handle": "UNIVER-19-Z",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/UNIVER-19-Z",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/34"
},
{
"href": "https://whois.arin.net/rest/org/UNIVER-19-Z",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/34"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"University of Delaware"
],
[
"adr",
{
"label": "Information Technologies\n192 South Chapel Street\nNewark\nDE\n19716\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
[],
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2023-11-08T15:02:07-05:00"
},
{
"eventAction": "registration",
"eventDate": "1984-10-03T00:00:00-04:00"
}
],
"handle": "AS34",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/34",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/34"
},
{
"href": "https://whois.arin.net/rest/asn/AS34",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/34"
}
],
"name": "UDELNET",
"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/34"
}
],
"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/34"
}
],
"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": 34,
"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.