Organization
ESnet
ESNET-EAST
Registered
Jun 17, 1997
29 years ago
IPv4 Prefixes
1
262,144 addresses
IPv6 Prefixes
0
BGP Neighbours
1
1 upstream/peer · 0 downstream
Registration
AS Number AS291 AS Name ESNET-EAST Organization ESnet Organization ID ENSN-Z Address Berkeley Lab, 1 Cyclotron Road MS 59R3103, Berkeley, CA, 94720, United States Country United States (US) Registry ARIN Allocated Jun 17, 1997 Record Created Jun 17, 1997 Last Updated Apr 02, 2012 Status
active
WHOIS Server whois.arin.net AS Description ESNET-EAST - ESnet, US Abuse Email [email protected] Abuse Phone +1-510-486-7607 IPv4 Prefixes
1 prefix · 262,144 addresses Routing data as of 2026-10-09 08:00 UTC
| Prefix | Range | Addresses |
|---|---|---|
| 198.124.0.0/14 | 198.124.0.0 – 198.127.255.255 | 262,144 |
IPv6 Prefixes
This AS does not currently announce any IPv6 prefixes.
BGP Neighbours
1 unique neighbour · 1 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 (1)
AS Name AS paths IPv4 sightings IPv6 sightings AS293 ESNET - ESnet 282 385 0
Raw RDAP Response
{
"endAutnum": 291,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-07-21T11:07:25-04:00"
}
],
"handle": "EH1-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/EH1-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/291"
},
{
"href": "https://whois.arin.net/rest/poc/EH1-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/291"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical",
"abuse",
"administrative"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "One Cyclotron Road\r\nMS-59R3103\nBerkeley\nCA\n94720\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Energy Sciences Network"
],
[
"org",
{},
"text",
"Lawrence Berkeley National Laboratory - Energy Sciences Network"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-510-486-7607"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2023-10-04T10:36:12-04:00"
},
{
"eventAction": "registration",
"eventDate": "2010-01-22T18:00:19-05:00"
}
],
"handle": "ENSN-Z",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ENSN-Z",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/291"
},
{
"href": "https://whois.arin.net/rest/org/ENSN-Z",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/291"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"ESnet"
],
[
"adr",
{
"label": "Berkeley Lab\r\n1 Cyclotron Road MS 59R3103\nBerkeley\nCA\n94720\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-07-21T11:07:25-04:00"
}
],
"handle": "EH1-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/EH1-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/291"
},
{
"href": "https://whois.arin.net/rest/poc/EH1-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/291"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "One Cyclotron Road\r\nMS-59R3103\nBerkeley\nCA\n94720\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Energy Sciences Network"
],
[
"org",
{},
"text",
"Lawrence Berkeley National Laboratory - Energy Sciences Network"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-510-486-7607"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2012-04-02T10:31:36-04:00"
},
{
"eventAction": "registration",
"eventDate": "1997-06-17T00:00:00-04:00"
}
],
"handle": "AS291",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/291",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/291"
},
{
"href": "https://whois.arin.net/rest/asn/AS291",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/291"
}
],
"name": "ESNET-EAST",
"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/291"
}
],
"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/291"
}
],
"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": 291,
"status": [
"active"
]
} Contact details of private individuals are redacted.