AS349
United States Department of Defense (DoD)
ARIN US active Announced
More ASNs in the United States → Organization
United States Department of Defense (DoD)
DNIC-ASBLK-00306-00371
Registered
Jun 30, 1989
37 years ago
IPv4 Prefixes
15
3,840 addresses
IPv6 Prefixes
1
256 × /48
BGP Neighbours
3
1 upstream/peer · 2 downstream
Registration
AS Number AS349 Registered Block AS306 – AS371 AS Name DNIC-ASBLK-00306-00371 Handle AS306 Organization United States Department of Defense (DoD) Organization ID USDDD Address 3990 E. Broad Street, Columbus, OH, 43218, United States Country United States (US) Registry ARIN Allocated Jun 30, 1989 Record Created Jun 30, 1989 Last Updated Sep 12, 2025 Status
active
WHOIS Server whois.arin.net AS Description DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD), US Abuse Email [email protected] Abuse Phone +1-844-347-2457;ext2 IPv4 Prefixes
15 prefixes · 3,840 addresses Routing data as of 2026-10-07 16:00 UTC
| Prefix | Range | Addresses |
|---|---|---|
| 55.23.8.0/24 | 55.23.8.0 – 55.23.8.255 | 256 |
| 55.23.9.0/24 | 55.23.9.0 – 55.23.9.255 | 256 |
| 55.23.11.0/24 | 55.23.11.0 – 55.23.11.255 | 256 |
| 55.23.22.0/24 | 55.23.22.0 – 55.23.22.255 | 256 |
| 55.23.23.0/24 | 55.23.23.0 – 55.23.23.255 | 256 |
| 55.23.25.0/24 | 55.23.25.0 – 55.23.25.255 | 256 |
| 55.23.27.0/24 | 55.23.27.0 – 55.23.27.255 | 256 |
| 55.23.28.0/24 | 55.23.28.0 – 55.23.28.255 | 256 |
| 55.23.29.0/24 | 55.23.29.0 – 55.23.29.255 | 256 |
| 55.23.31.0/24 | 55.23.31.0 – 55.23.31.255 | 256 |
| 55.23.33.0/24 | 55.23.33.0 – 55.23.33.255 | 256 |
| 55.23.35.0/24 | 55.23.35.0 – 55.23.35.255 | 256 |
| 55.23.103.0/24 | 55.23.103.0 – 55.23.103.255 | 256 |
| 55.23.129.0/24 | 55.23.129.0 – 55.23.129.255 | 256 |
| 55.23.182.0/24 | 55.23.182.0 – 55.23.182.255 | 256 |
IPv6 Prefixes
1 prefix · 256 × /48 Routing data as of 2026-10-07 16:00 UTC
| Prefix | Addresses |
|---|---|
| 2608:18b:2800:: | 288 |
BGP Neighbours
3 unique neighbours · 1 upstream/peer · 2 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. Networks seen to the right of this AS in BGP paths — networks whose routes it carries, typically its customers (downstreams). Upstream & peer side (1)
AS Name AS paths IPv4 sightings IPv6 sightings AS306 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) 597 5,281 338 Downstream side (2)
Raw RDAP Response
{
"endAutnum": 371,
"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/autnum/349"
},
{
"href": "https://whois.arin.net/rest/poc/MIL-HSTMST-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/349"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"noc",
"abuse",
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "DISA-Columbus\n300 North James Road\nWhitehall\nOH\n43213\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"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/autnum/349"
},
{
"href": "https://whois.arin.net/rest/poc/REGIS10-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/349"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative",
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "DISA-Columbus\n300 North James Road\nWhitehall\nOH\n43213\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"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": "2026-08-12T11:35:39-04:00"
},
{
"eventAction": "registration",
"eventDate": "2007-01-12T12:10:52-05:00"
}
],
"handle": "USDDD",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/USDDD",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/349"
},
{
"href": "https://whois.arin.net/rest/org/USDDD",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/349"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"United States Department of Defense (DoD)"
],
[
"adr",
{
"label": "3990 E. Broad Street\nColumbus\nOH\n43218\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-09-12T09:52:02-04:00"
},
{
"eventAction": "registration",
"eventDate": "1989-06-30T00:00:00-04:00"
}
],
"handle": "AS306",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/306",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/349"
},
{
"href": "https://whois.arin.net/rest/asn/AS306",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/349"
}
],
"name": "DNIC-ASBLK-00306-00371",
"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/349"
}
],
"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/349"
}
],
"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": 306,
"status": [
"active"
]
} Contact details of private individuals are redacted.