Organization
Children's Hospital Los Angeles
CHLA
Registered
Oct 31, 2014
11 years ago
IPv4 Prefixes
4
1,024 addresses
IPv6 Prefixes
0
BGP Neighbours
2
2 upstream/peer · 0 downstream
Registration
AS Number AS11756 AS Name CHLA Organization Children's Hospital Los Angeles Organization ID CHLA-1 Address 4650 SUNSET BLVD, Los Angeles, CA, 90027, United States Country United States (US) Registry ARIN Allocated Oct 31, 2014 Record Created Oct 31, 2014 Last Updated Oct 31, 2014 Status
active
WHOIS Server whois.arin.net AS Description CHLA - Children_s Hospital Los Angeles, US Abuse Email [email protected] Abuse Phone +1-323-660-2450;ext4444 IPv4 Prefixes
4 prefixes · 1,024 addresses · 2 top-level Routing data as of 2026-10-07 08:00 UTC
| Prefix | Range | Addresses |
|---|---|---|
| 104.193.218.0/23 | 104.193.218.0 – 104.193.219.255 | 512 |
| 104.193.218.0/24 | 104.193.218.0 – 104.193.218.255 | 256 |
| 104.193.222.0/23 | 104.193.222.0 – 104.193.223.255 | 512 |
| 104.193.222.0/24 | 104.193.222.0 – 104.193.222.255 | 256 |
IPv6 Prefixes
This AS does not currently announce any IPv6 prefixes.
BGP Neighbours
2 unique neighbours · 2 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 (2)
Raw RDAP Response
{
"endAutnum": 11756,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2024-09-05T15:19:08-04:00"
},
{
"eventAction": "registration",
"eventDate": "2020-09-16T12:52:53-04:00"
}
],
"handle": "NETWO9308-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/NETWO9308-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11756"
},
{
"href": "https://whois.arin.net/rest/poc/NETWO9308-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11756"
}
],
"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 2025-09-05"
],
"title": "Unvalidated POC"
}
],
"roles": [
"technical",
"routing",
"abuse",
"dns",
"noc"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "4650 Sunset Blvd\nMS 39\nLos Angeles\nCA\n90027\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Network Administrator"
],
[
"org",
{},
"text",
"Childrens Hospital Los Angeles"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-323-660-2450;ext4444"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2024-09-05T15:18:55-04:00"
},
{
"eventAction": "registration",
"eventDate": "2014-07-02T17:26:01-04:00"
}
],
"handle": "NADYB-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/NADYB-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11756"
},
{
"href": "https://whois.arin.net/rest/poc/NADYB-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11756"
}
],
"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 2025-09-05"
],
"title": "Unvalidated POC"
}
],
"roles": [
"abuse",
"noc",
"administrative",
"technical"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "Childrens Hospital Los Angeles\r\n4650 Sunset Blvd\r\nMS 39\nLos Angeles\nCA\n90027\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Chris Nadybal"
],
[
"n",
{},
"text",
[
"Nadybal",
"Chris",
"",
"",
""
]
],
[
"kind",
{},
"text",
"individual"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-323-361-7647"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2020-09-16T12:55:36-04:00"
},
{
"eventAction": "registration",
"eventDate": "2011-03-01T14:01:15-05:00"
}
],
"handle": "CHLA-1",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/CHLA-1",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11756"
},
{
"href": "https://whois.arin.net/rest/org/CHLA-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11756"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Children's Hospital Los Angeles"
],
[
"adr",
{
"label": "4650 SUNSET BLVD\nLos Angeles\nCA\n90027\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2014-10-31T13:53:54-04:00"
},
{
"eventAction": "registration",
"eventDate": "2014-10-31T13:53:54-04:00"
}
],
"handle": "AS11756",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/11756",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11756"
},
{
"href": "https://whois.arin.net/rest/asn/AS11756",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11756"
}
],
"name": "CHLA",
"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/11756"
}
],
"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/11756"
}
],
"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": 11756,
"status": [
"active"
]
} Contact details of private individuals are redacted.