Organization
U.S. National Science Foundation
NSF-HQ-AS
Registered
Mar 31, 1987
39 years ago
IPv4 Prefixes
3
66,048 addresses
IPv6 Prefixes
1
256 × /48
BGP Neighbours
1
1 upstream/peer · 0 downstream
Registration
AS Number AS102 AS Name NSF-HQ-AS Organization U.S. National Science Foundation Organization ID NSF Address Randolph Building, 401 Dulany Street, Alexandria, VA, 22314, United States Country United States (US) Registry ARIN Allocated Mar 31, 1987 Record Created Mar 31, 1987 Last Updated Feb 11, 2025 Status
active
WHOIS Server whois.arin.net AS Description NSF-HQ-AS - U.S. National Science Foundation, US Abuse Email [email protected] Abuse Phone +1-703-292-5050 IPv4 Prefixes
3 prefixes · 66,048 addresses Routing data as of 2026-10-08 16:00 UTC
| Prefix | Range | Addresses |
|---|---|---|
| 128.150.0.0/16 | 128.150.0.0 – 128.150.255.255 | 65,536 |
| 192.12.209.0/24 | 192.12.209.0 – 192.12.209.255 | 256 |
| 198.181.231.0/24 | 198.181.231.0 – 198.181.231.255 | 256 |
IPv6 Prefixes
1 prefix · 256 × /48 Routing data as of 2026-10-08 16:00 UTC
| Prefix | Addresses |
|---|---|
| 2620:10f:6000:: | 288 |
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 AS6223 CENTURYLINK-MTIPS1-STN - CenturyLink Communications, LLC 349 997 335
Raw RDAP Response
{
"endAutnum": 102,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-08-18T09:34:38-04:00"
},
{
"eventAction": "registration",
"eventDate": "2010-06-25T08:17:46-04:00"
}
],
"handle": "NSFAB-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/NSFAB-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/102"
},
{
"href": "https://whois.arin.net/rest/poc/NSFAB-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/102"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "2415 Eisenhower Ave\nAlexandria\nVA\n22314\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"NSF Abuse"
],
[
"org",
{},
"text",
"National Science Foundation"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-703-292-5050"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-08-18T09:34:42-04:00"
},
{
"eventAction": "registration",
"eventDate": "2010-06-25T08:29:35-04:00"
}
],
"handle": "NSFNO-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/NSFNO-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/102"
},
{
"href": "https://whois.arin.net/rest/poc/NSFNO-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/102"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"noc"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "2415 Eisenhower Ave\nAlexandria\nVA\n22314\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"NSF NOC"
],
[
"org",
{},
"text",
"National Science Foundation"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-703-292-5050"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-05-22T08:14:45-04:00"
},
{
"eventAction": "registration",
"eventDate": "2025-05-22T11:33:26-04:00"
}
],
"handle": "ORGOW-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ORGOW-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/102"
},
{
"href": "https://whois.arin.net/rest/poc/ORGOW-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/102"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical",
"dns",
"abuse",
"noc",
"administrative",
"routing"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "2415 Eisenhower Ave\nAlexandria\nVA\n22314\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Org-Owner"
],
[
"org",
{},
"text",
"U.S. National Science Foundation"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-703-292-4223"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-08-13T09:24:09-04:00"
}
],
"handle": "NSF",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/NSF",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/102"
},
{
"href": "https://whois.arin.net/rest/org/NSF",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/102"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"U.S. National Science Foundation"
],
[
"adr",
{
"label": "Randolph Building\n401 Dulany Street\nAlexandria\nVA\n22314\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-02-11T11:36:49-05:00"
},
{
"eventAction": "registration",
"eventDate": "1987-03-31T00:00:00-05:00"
}
],
"handle": "AS102",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/102",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/102"
},
{
"href": "https://whois.arin.net/rest/asn/AS102",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/102"
}
],
"name": "NSF-HQ-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/102"
}
],
"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/102"
}
],
"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": 102,
"status": [
"active"
]
} Contact details of private individuals are redacted.