Whois & RDAP Lookup
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RDAPIP Range21.0.0.0 - 21.255.255.255
HandleNET-21-0-0-0-2
NameDNIC-SNET-021
TypeALLOCATION
HolderDoD Network Information Center
Registered2025-09-05 19:15 UTC
Updated2025-09-05 19:15 UTC
RegistrantDoD Network Information Center
Address3990 E. Broad Street, Columbus, OH, 43218, United States
Admin ContactNetwork DoD
OrganizationDoD Network Information Center (DoD NIC)
Email[email protected]
Phone+1-844-347-2457;ext2
AddressDISA-Columbus, 300 North James Road, Whitehall, OH, 43213, United States
Tech ContactNetwork DoD
OrganizationDoD Network Information Center (DoD NIC)
Email[email protected]
Phone+1-844-347-2457;ext2
AddressDISA-Columbus, 300 North James Road, Whitehall, OH, 43213, United States
Abuse Contact[email protected]
Abuse Phone+1-844-347-2457;ext2
Statusactive
Registry RDAPhttp://rdap.arin.net
Raw WHOIS response
# # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2026, American Registry for Internet Numbers, Ltd. # # start NetRange: 21.0.0.0 - 21.255.255.255 CIDR: 21.0.0.0/8 NetName: DNIC-SNET-021 NetHandle: NET-21-0-0-0-1 Parent: () NetType: Direct Allocation OriginAS: Organization: United States Department of Defense (DoD) (USDDD) RegDate: 1991-07-01 Updated: 2025-09-05 Ref: https://rdap.arin.net/registry/ip/21.0.0.0 OrgName: United States Department of Defense (DoD) OrgId: USDDD Address: 3990 E. Broad Street City: Columbus StateProv: OH PostalCode: 43218 Country: US RegDate: 2007-01-12 Updated: 2025-03-13 Ref: https://rdap.arin.net/registry/entity/USDDD OrgNOCHandle: MIL-HSTMST-ARIN OrgNOCName: Network DoD OrgNOCPhone: +1-844-347-2457 OrgNOCEmail: [email protected] OrgNOCRef: https://rdap.arin.net/registry/entity/MIL-HSTMST-ARIN OrgAbuseHandle: MIL-HSTMST-ARIN OrgAbuseName: Network DoD OrgAbusePhone: +1-844-347-2457 OrgAbuseEmail: [email protected] OrgAbuseRef: https://rdap.arin.net/registry/entity/MIL-HSTMST-ARIN OrgTechHandle: REGIS10-ARIN OrgTechName: Registration OrgTechPhone: +1-844-347-2457 OrgTechEmail: [email protected] OrgTechRef: https://rdap.arin.net/registry/entity/REGIS10-ARIN OrgTechHandle: MIL-HSTMST-ARIN OrgTechName: Network DoD OrgTechPhone: +1-844-347-2457 OrgTechEmail: [email protected] OrgTechRef: https://rdap.arin.net/registry/entity/MIL-HSTMST-ARIN # end # start NetRange: 21.0.0.0 - 21.255.255.255 CIDR: 21.0.0.0/8 NetName: DNIC-SNET-021 NetHandle: NET-21-0-0-0-2 Parent: DNIC-SNET-021 (NET-21-0-0-0-1) NetType: Reallocated OriginAS: Organization: DoD Network Information Center (DNIC) RegDate: 2025-09-05 Updated: 2025-09-05 Ref: https://rdap.arin.net/registry/ip/21.0.0.0 OrgName: DoD Network Information Center OrgId: DNIC Address: 3990 E. Broad Street City: Columbus StateProv: OH PostalCode: 43218 Country: US RegDate: Updated: 2025-03-13 Ref: https://rdap.arin.net/registry/entity/DNIC OrgTechHandle: MIL-HSTMST-ARIN OrgTechName: Network DoD OrgTechPhone: +1-844-347-2457 OrgTechEmail: [email protected] OrgTechRef: https://rdap.arin.net/registry/entity/MIL-HSTMST-ARIN OrgTechHandle: REGIS10-ARIN OrgTechName: Registration OrgTechPhone: +1-844-347-2457 OrgTechEmail: [email protected] OrgTechRef: https://rdap.arin.net/registry/entity/REGIS10-ARIN OrgAbuseHandle: REGIS10-ARIN OrgAbuseName: Registration OrgAbusePhone: +1-844-347-2457 OrgAbuseEmail: [email protected] OrgAbuseRef: https://rdap.arin.net/registry/entity/REGIS10-ARIN # end # # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2026, American Registry for Internet Numbers, Ltd. # % Query time: 537 msec % WHEN: Fri Jul 31 07:11:14 UTC 2026
Raw RDAP JSON (registry) http://rdap.arin.net
{
"arin_originas0_originautnums": [],
"cidr0_cidrs": [
{
"length": 8,
"v4prefix": "21.0.0.0"
}
],
"endAddress": "21.255.255.255",
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-02-12T10:14:24-05:00"
},
{
"eventAction": "registration",
"eventDate": "1993-05-26T19:47:50-04:00"
}
],
"handle": "MIL-HSTMST-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/MIL-HSTMST-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/21.0.0.0/8"
},
{
"href": "https://whois.arin.net/rest/poc/MIL-HSTMST-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/21.0.0.0/8"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical",
"administrative"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "DISA-Columbus\n300 North James Road\nWhitehall\nOH\n43213\nUnited States"
},
"text",
[
"",
"",
"",
"",
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""
]
],
[
"fn",
{},
"text",
"Network DoD"
],
[
"org",
{},
"text",
"DoD Network Information Center (DoD NIC)"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-844-347-2457;ext2"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-02-12T13:52:28-05:00"
},
{
"eventAction": "registration",
"eventDate": "2009-06-24T09:41:15-04:00"
}
],
"handle": "REGIS10-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/REGIS10-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/21.0.0.0/8"
},
{
"href": "https://whois.arin.net/rest/poc/REGIS10-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/21.0.0.0/8"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical",
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "DISA-Columbus\n300 North James Road\nWhitehall\nOH\n43213\nUnited States"
},
"text",
[
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""
]
],
[
"fn",
{},
"text",
"Registration"
],
[
"org",
{},
"text",
"DoD Network Information Center"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-844-347-2457;ext2"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-03-13T11:32:05-04:00"
}
],
"handle": "DNIC",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/DNIC",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/21.0.0.0/8"
},
{
"href": "https://whois.arin.net/rest/org/DNIC",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/21.0.0.0/8"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"DoD Network Information Center"
],
[
"adr",
{
"label": "3990 E. Broad Street\nColumbus\nOH\n43218\nUnited States"
},
"text",
[
"",
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"",
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""
]
],
[
"kind",
{},
"text",
"org"
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]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-09-05T15:15:42-04:00"
},
{
"eventAction": "registration",
"eventDate": "2025-09-05T15:15:42-04:00"
}
],
"handle": "NET-21-0-0-0-2",
"ipVersion": "v4",
"links": [
{
"href": "https://rdap.arin.net/registry/ip/21.0.0.0",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/21.0.0.0/8"
},
{
"href": "https://whois.arin.net/rest/net/NET-21-0-0-0-2",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/21.0.0.0/8"
},
{
"href": "https://rdap.arin.net/registry/ip/21.0.0.0/8",
"rel": "up",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/21.0.0.0/8"
}
],
"name": "DNIC-SNET-021",
"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/21.0.0.0/8"
}
],
"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/21.0.0.0/8"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "ip network",
"parentHandle": "NET-21-0-0-0-1",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"cidr0",
"arin_originas0"
],
"startAddress": "21.0.0.0",
"status": [
"active"
],
"type": "ALLOCATION"
}Frequently asked questions
What is WHOIS?
WHOIS is a public directory that answers "who is responsible for this?" for domains, IP ranges and ASNs. It lists registration dates, the registrar, nameservers and contacts.
What is RDAP, and how does it differ?
RDAP is the modern replacement for WHOIS. It returns the same records in a structured, consistent format. We query RDAP first and fall back to classic WHOIS text when a registry has not adopted it yet.
What is the difference between a registrar and a registrant?
The registrar is the company you register and manage a domain through, such as xTom or GoDaddy. The registrant is the person or organization that actually holds the domain.
What are nameservers?
Nameservers answer DNS questions for a domain and decide which IP addresses the name resolves to. They also show which DNS provider the domain uses.
What is DNSSEC?
DNSSEC adds cryptographic signatures to DNS answers so they cannot be quietly altered in transit. "Signed" means the domain has it enabled, "unsigned" means it does not.
Why is the contact information redacted?
Privacy laws such as GDPR require registrars to hide most personal details in public records. The abuse contact is usually still shown, so a domain or network can be reported when something goes wrong.