Organization
ESnet
ESNET-V6
Location
Berkeley
California, United States (US)
Hostname
—
Geolocation
United States (US) United States
- Country
- United States (US)
- Region
- California
- City
- Berkeley
- Continent
- North America
- Coordinates
- 37.8759, -122.25 View on map ↗
Network Information
IP Range 2001:400:: – 2001:400:ffff:ffff:ffff:ffff:ffff:ffff CIDR 2001:400::/32 Network Name ESNET-V6 Handle NET6-2001-400-1 Type DIRECT ALLOCATION Parent Network NET6-2001-400-0 Organization ESnet Organization ID V6ES Address Lawrence Berkeley National Laboratory, One Cyclotron Road, MS: 59R3103, Berkeley, CA, 94720, United States Country United States (US) Registry ARIN Registered On Aug 03, 1999 Last Updated Feb 21, 2018 Status
active
ASN & Routing
Origin AS AS293 AS Name ESNET - ESnet, US Announced Prefix 2001:400::/32 AS Registry ARIN Prefix Country United States (US) Allocated 1999-08-03 RPKI Origin Valid (covered by a matching ROA)
Reverse DNS
No PTR record is published for this address.
Abuse Contact
Raw RDAP Response
{
"arin_originas0_originautnums": [],
"cidr0_cidrs": [
{
"v6prefix": "2001:400::",
"length": 32
}
],
"endAddress": "2001:400:ffff:ffff:ffff:ffff:ffff:ffff",
"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/ip/2001:400::"
},
{
"href": "https://whois.arin.net/rest/poc/EH1-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/2001:400::"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative",
"abuse",
"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": "2023-07-24T14:06:34-04:00"
},
{
"eventAction": "registration",
"eventDate": "1999-08-03T15:04:47-04:00"
}
],
"handle": "V6ES",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/V6ES",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/2001:400::"
},
{
"href": "https://whois.arin.net/rest/org/V6ES",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/2001:400::"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"ESnet"
],
[
"adr",
{
"label": "Lawrence Berkeley National Laboratory\r\nOne Cyclotron Road\r\nMS: 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/ip/2001:400::"
},
{
"href": "https://whois.arin.net/rest/poc/EH1-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/2001:400::"
}
],
"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": "2018-02-21T14:24:55-05:00"
},
{
"eventAction": "registration",
"eventDate": "1999-08-03T15:04:47-04:00"
}
],
"handle": "NET6-2001-400-1",
"ipVersion": "v6",
"links": [
{
"href": "https://rdap.arin.net/registry/ip/2001:400::",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/2001:400::"
},
{
"href": "https://whois.arin.net/rest/net/NET6-2001-400-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/2001:400::"
}
],
"name": "ESNET-V6",
"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/ip/2001:400::"
}
],
"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/ip/2001:400::"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "ip network",
"parentHandle": "NET6-2001-400-0",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"cidr0",
"arin_originas0"
],
"startAddress": "2001:400::",
"status": [
"active"
],
"type": "DIRECT ALLOCATION"
} Contact details of private individuals are redacted.