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
AS21633
DOI-NBC-NET - U.S. Department of the Interior Announcing routesAS nameDOI-NBC-NET
OrganisationU.S. Department of the Interior
Registry (RIR)ARIN
HandleAS21633
RangeAS21633
Registered01 Jun 2001
Last changed17 Nov 2023
4IPv4 prefixes
0IPv6 prefixes
2Upstreams
0Downstreams
Upstreams
| AS | Network name | Visibility |
|---|---|---|
| AS22284 | AS22284-DOI-OPS - U.S. Department of the Interior | 227 |
| AS3549 | LVLT-3549 - Level 3 Parent, LLC | 223 |
Downstreams
None seen.
IPv4 prefixes (4)
RPKI-validate all prefixes of AS21633
Contacts
| Role | Name | Handle | Email / phone | Address |
|---|---|---|---|---|
| registrant | U.S. Department of the Interior | UDI-1 | 1849 C St., N.W., Washington, DC, 20240, United States | |
| administrative, abuse, dns, technical | Steven A Harrington | STEVE25-ARIN | [email protected], +1-303-969-6629, +1-303-564-8342 | 1 Denver Federal Center W. 6th & Kipling, Bldg 53, Lakewood, CO, 80225, United States |
| abuse, technical | Amy Y Shaw | AYS-ARIN | [email protected], +1-703-487-3864, +1-703-622-6097 | 12201 Sunrise Valley Drive 2P101 MS-241, Reston, VA, 20192, United States |
| technical | Ronald Pickett | PICKE159-ARIN | [email protected], +1-303-969-7456 | West 6th Avenue & Kipling Street, Building 53, Lakewood, CO, 80215, United States |
Raw registry response
{
"endAutnum": 21633,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-01-29T12:10:09-05:00"
},
{
"eventAction": "registration",
"eventDate": "2003-09-09T17:10:34-04:00"
}
],
"handle": "STEVE25-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/STEVE25-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/21633"
},
{
"href": "https://whois.arin.net/rest/poc/STEVE25-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/21633"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative",
"abuse",
"dns",
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "1 Denver Federal Center W. 6th & Kipling, Bldg 53\nLakewood\nCO\n80225\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Steven A Harrington"
],
[
"n",
[],
"text",
[
"Harrington",
"Steven",
"A",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-303-969-6629"
],
[
"tel",
{
"type": [
"work",
"cell"
]
},
"text",
"+1-303-564-8342"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-01-30T10:25:08-05:00"
},
{
"eventAction": "registration",
"eventDate": "2022-02-01T18:19:12-05:00"
}
],
"handle": "AYS-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/AYS-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/21633"
},
{
"href": "https://whois.arin.net/rest/poc/AYS-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/21633"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"ARIN has attempted to validate the data for this POC, but has received no response from the POC since 2026-01-30"
],
"title": "Unvalidated POC"
}
],
"roles": [
"abuse",
"technical"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "12201 Sunrise Valley Drive 2P101 MS-241\nReston\nVA\n20192\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Amy Y Shaw"
],
[
"n",
[],
"text",
[
"Shaw",
"Amy",
"Y",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-703-487-3864"
],
[
"tel",
{
"type": [
"work",
"cell"
]
},
"text",
"+1-703-622-6097"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-01-28T08:30:52-05:00"
},
{
"eventAction": "registration",
"eventDate": "2025-01-28T12:46:30-05:00"
}
],
"handle": "PICKE159-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/PICKE159-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/21633"
},
{
"href": "https://whois.arin.net/rest/poc/PICKE159-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/21633"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "West 6th Avenue & Kipling Street\nBuilding 53\nLakewood\nCO\n80215\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Ronald Pickett"
],
[
"n",
[],
"text",
[
"Pickett",
"Ronald",
"",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-303-969-7456"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-01-28T13:06:22-05:00"
},
{
"eventAction": "registration",
"eventDate": "1993-09-07T00:00:00-04:00"
}
],
"handle": "UDI-1",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/UDI-1",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/21633"
},
{
"href": "https://whois.arin.net/rest/org/UDI-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/21633"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"U.S. Department of the Interior"
],
[
"adr",
{
"label": "1849 C St., N.W.\nWashington\nDC\n20240\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
[],
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2023-11-17T12:45:18-05:00"
},
{
"eventAction": "registration",
"eventDate": "2001-06-01T00:00:00-04:00"
}
],
"handle": "AS21633",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/21633",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/21633"
},
{
"href": "https://whois.arin.net/rest/asn/AS21633",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/21633"
}
],
"name": "DOI-NBC-NET",
"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/21633"
}
],
"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/21633"
}
],
"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": 21633,
"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.