AS Name
KBR
Registered
Apr 13, 2007
19 years ago
IPv4 Prefixes
9
4,608 addresses
IPv6 Prefixes
0
BGP Neighbours
3
3 upstream/peer · 0 downstream
Registration
AS Number AS16525 AS Name KBR Organization KBR Organization ID KBR-3 Address 601 Jefferson Ave, Houston, TX, 77002, United States Country United States (US) Registry ARIN Allocated Apr 13, 2007 Record Created Apr 13, 2007 Last Updated Feb 24, 2012 Status
active
WHOIS Server whois.arin.net AS Description KBR - KBR, US Abuse Email [email protected] Abuse Phone +1-713-753-4357 IPv4 Prefixes
9 prefixes · 4,608 addresses Routing data as of 2026-10-07 08:00 UTC
| Prefix | Range | Addresses |
|---|---|---|
| 161.51.0.0/22 | 161.51.0.0 – 161.51.3.255 | 1,024 |
| 161.51.4.0/22 | 161.51.4.0 – 161.51.7.255 | 1,024 |
| 161.51.8.0/24 | 161.51.8.0 – 161.51.8.255 | 256 |
| 161.51.10.0/24 | 161.51.10.0 – 161.51.10.255 | 256 |
| 161.51.11.0/24 | 161.51.11.0 – 161.51.11.255 | 256 |
| 161.51.20.0/24 | 161.51.20.0 – 161.51.20.255 | 256 |
| 161.51.21.0/24 | 161.51.21.0 – 161.51.21.255 | 256 |
| 161.51.22.0/24 | 161.51.22.0 – 161.51.22.255 | 256 |
| 161.51.24.0/22 | 161.51.24.0 – 161.51.27.255 | 1,024 |
IPv6 Prefixes
This AS does not currently announce any IPv6 prefixes.
BGP Neighbours
3 unique neighbours · 3 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 (3)
Raw RDAP Response
{
"endAutnum": 16525,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-05-21T15:03:52-04:00"
},
{
"eventAction": "registration",
"eventDate": "2004-11-15T16:25:12-05:00"
}
],
"handle": "ADMIN447-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ADMIN447-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/16525"
},
{
"href": "https://whois.arin.net/rest/poc/ADMIN447-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/16525"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "601 Jefferson Ave\nHouston\nTX\n77002\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Administrative POC"
],
[
"org",
{},
"text",
"KBR Inc."
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-713-753-4000"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2023-08-28T08:39:44-04:00"
},
{
"eventAction": "registration",
"eventDate": "2020-01-22T15:35:06-05:00"
}
],
"handle": "HERRI169-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/HERRI169-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/16525"
},
{
"href": "https://whois.arin.net/rest/poc/HERRI169-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/16525"
}
],
"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 2024-08-27"
],
"title": "Unvalidated POC"
}
],
"roles": [
"technical"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"REDACTED"
],
[
"kind",
{},
"text",
"individual"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-08-05T08:57:49-04:00"
},
{
"eventAction": "registration",
"eventDate": "2004-11-15T16:25:12-05:00"
}
],
"handle": "TECHN193-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/TECHN193-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/16525"
},
{
"href": "https://whois.arin.net/rest/poc/TECHN193-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/16525"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical",
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "601 Jefferson Ave\nHouston\nTX\n77002\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Technical POC"
],
[
"org",
{},
"text",
"KBR Inc."
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-713-753-4357"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2020-02-13T13:04:54-05:00"
},
{
"eventAction": "registration",
"eventDate": "2004-11-15T16:25:12-05:00"
}
],
"handle": "KBR-3",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/KBR-3",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/16525"
},
{
"href": "https://whois.arin.net/rest/org/KBR-3",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/16525"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"KBR"
],
[
"adr",
{
"label": "601 Jefferson Ave\nHouston\nTX\n77002\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-08-05T08:57:49-04:00"
},
{
"eventAction": "registration",
"eventDate": "2004-11-15T16:25:12-05:00"
}
],
"handle": "TECHN193-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/TECHN193-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/16525"
},
{
"href": "https://whois.arin.net/rest/poc/TECHN193-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/16525"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "601 Jefferson Ave\nHouston\nTX\n77002\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Technical POC"
],
[
"org",
{},
"text",
"KBR Inc."
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-713-753-4357"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2012-02-24T09:44:34-05:00"
},
{
"eventAction": "registration",
"eventDate": "2007-04-13T14:53:30-04:00"
}
],
"handle": "AS16525",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/16525",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/16525"
},
{
"href": "https://whois.arin.net/rest/asn/AS16525",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/16525"
}
],
"name": "KBR",
"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/16525"
}
],
"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/16525"
}
],
"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": 16525,
"status": [
"active"
]
} Contact details of private individuals are redacted.