AS11131
University of Maryland Baltimore County (UMBC)
ARIN US active Announced
More ASNs in the United States → Organization
University of Maryland Baltimore County (UMBC)
UMBC-AS
Registered
Apr 20, 1998
28 years ago
IPv4 Prefixes
3
82,176 addresses
IPv6 Prefixes
1
16 × /48
BGP Neighbours
3
3 upstream/peer · 0 downstream
Registration
AS Number AS11131 AS Name UMBC-AS Organization University of Maryland Baltimore County (UMBC) Organization ID UMBCU Address 1000 Hilltop Circle, Baltimore, MD, 21250, United States Country United States (US) Registry ARIN Allocated Apr 20, 1998 Record Created Apr 20, 1998 Last Updated Apr 16, 2019 Status
active
WHOIS Server whois.arin.net AS Description UMBC-AS - University of Maryland Baltimore County (UMBC), US Abuse Email [email protected] Abuse Phone +1-410-455-3256 IPv4 Prefixes
3 prefixes · 82,176 addresses Routing data as of 2026-10-05 00:00 UTC
| Prefix | Range | Addresses |
|---|---|---|
| 130.85.0.0/16 | 130.85.0.0 – 130.85.255.255 | 65,536 |
| 136.160.0.0/18 | 136.160.0.0 – 136.160.63.255 | 16,384 |
| 199.201.245.0/24 | 199.201.245.0 – 199.201.245.255 | 256 |
IPv6 Prefixes
1 prefix · 16 × /48 Routing data as of 2026-10-05 00:00 UTC
| Prefix | Addresses |
|---|---|
| 2620:0:5300:: | 284 |
BGP Neighbours
3 unique neighbours · 3 upstream/peer · 0 downstream. A neighbour can be seen on more than one side. Rows are ordered by AS paths: the number of BGP paths seen by RIPE RIS that contain the adjacency. Sightings count each IPv4/IPv6 route with the adjacency once per RIS peer that sees it (routes × peers), so they show how widely it is seen, not how many distinct routes it carries. Networks seen to the left of this AS in BGP paths, toward the route collectors — typically its transit providers (upstreams) and peers. Upstream & peer side (3)
Raw RDAP Response
{
"endAutnum": 11131,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-11-03T10:36:21-05:00"
},
{
"eventAction": "registration",
"eventDate": "2022-02-25T10:48:43-05:00"
}
],
"handle": "PETRY11-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/PETRY11-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11131"
},
{
"href": "https://whois.arin.net/rest/poc/PETRY11-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11131"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"routing",
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"REDACTED"
],
[
"kind",
{},
"text",
"individual"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-04-21T08:46:09-04:00"
},
{
"eventAction": "registration",
"eventDate": "2019-04-16T08:40:36-04:00"
}
],
"handle": "SOELL-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/SOELL-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11131"
},
{
"href": "https://whois.arin.net/rest/poc/SOELL-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11131"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"abuse",
"noc"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "1000 Hilltop Circle\nEngineering 125\nBaltimore\nMD\n21250\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Ray Soellner"
],
[
"n",
{},
"text",
[
"Soellner",
"Ray",
"",
"",
""
]
],
[
"kind",
{},
"text",
"individual"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-410-455-3256"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-11-29T09:47:51-05:00"
},
{
"eventAction": "registration",
"eventDate": "1988-08-08T15:41:04-04:00"
}
],
"handle": "JJS41-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/JJS41-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11131"
},
{
"href": "https://whois.arin.net/rest/poc/JJS41-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11131"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"REDACTED"
],
[
"kind",
{},
"text",
"individual"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-02-20T09:14:27-05:00"
},
{
"eventAction": "registration",
"eventDate": "2023-01-11T12:10:37-05:00"
}
],
"handle": "WHOIS10-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/WHOIS10-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11131"
},
{
"href": "https://whois.arin.net/rest/poc/WHOIS10-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11131"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical",
"dns"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "1000 Hilltop Circle\nBaltimore\nMD\n21250\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"WhoIs Technical"
],
[
"org",
{},
"text",
"UMBC"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-410-455-3256"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-03-02T16:17:37-05:00"
},
{
"eventAction": "registration",
"eventDate": "1998-04-20T00:00:00-04:00"
}
],
"handle": "UMBCU",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/UMBCU",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11131"
},
{
"href": "https://whois.arin.net/rest/org/UMBCU",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11131"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"For Security Complaints Contact [email protected]"
],
"title": "Registration Comments"
}
],
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"University of Maryland Baltimore County (UMBC)"
],
[
"adr",
{
"label": "1000 Hilltop Circle\nBaltimore\nMD\n21250\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-04-21T08:46:09-04:00"
},
{
"eventAction": "registration",
"eventDate": "2019-04-16T08:40:36-04:00"
}
],
"handle": "SOELL-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/SOELL-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11131"
},
{
"href": "https://whois.arin.net/rest/poc/SOELL-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11131"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"REDACTED"
],
[
"kind",
{},
"text",
"individual"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2017-11-08T14:39:28-05:00"
},
{
"eventAction": "registration",
"eventDate": "2000-03-17T16:00:57-05:00"
}
],
"handle": "MC712-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/MC712-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11131"
},
{
"href": "https://whois.arin.net/rest/poc/MC712-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11131"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"http://www.umbc.edu/\r",
"UMBC Helpdesk 410-455-3838"
],
"title": "Registration Comments"
},
{
"description": [
"ARIN has attempted to validate the data for this POC, but has received no response from the POC since 2018-11-08"
],
"title": "Unvalidated POC"
}
],
"roles": [
"technical"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"REDACTED"
],
[
"kind",
{},
"text",
"individual"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2019-04-16T08:42:03-04:00"
},
{
"eventAction": "registration",
"eventDate": "1998-04-20T00:00:00-04:00"
}
],
"handle": "AS11131",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/11131",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11131"
},
{
"href": "https://whois.arin.net/rest/asn/AS11131",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11131"
}
],
"name": "UMBC-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/11131"
}
],
"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/11131"
}
],
"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": 11131,
"status": [
"active"
]
} Contact details of private individuals are redacted.