Organization
Alameda County
ALAMEDA
Location
Oakland (Downtown Oakland)
California, United States (US)
Hostname
—
Geolocation
United States (US) United States
- Country
- United States (US)
- Region
- California
- City
- Oakland (Downtown Oakland)
- Continent
- North America
- Coordinates
- 37.8003, -122.264 View on map ↗
Network Information
IP Range 166.107.0.0 – 166.107.255.255 CIDR 166.107.0.0/16 Network Name ALAMEDA Handle NET-166-107-0-0-1 Type DIRECT ALLOCATION Parent Network NET-166-0-0-0-0 Organization Alameda County Organization ID ACDP Address 1221 Oak Street, RM 41, ITD Data Center, Oakland, CA, 94612, United States Country United States (US) Registry ARIN Registered On Dec 03, 1993 Last Updated Dec 15, 2021 Status
active
ASN & Routing
Origin AS AS12054 AS Name ALAMEDACOUNTYDATAPROCESSING - Alameda County, US Announced Prefix 166.107.80.0/20 AS Registry ARIN Prefix Country United States (US) Allocated 1993-12-03 RPKI Origin Not found (no ROA covers this prefix)
Reverse DNS
No PTR record is published for this address.
Abuse Contact
Raw RDAP Response
{
"arin_originas0_originautnums": [],
"cidr0_cidrs": [
{
"v4prefix": "166.107.0.0",
"length": 16
}
],
"endAddress": "166.107.255.255",
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-07-30T18:06:54-04:00"
},
{
"eventAction": "registration",
"eventDate": "2017-11-01T11:36:48-04:00"
}
],
"handle": "NETWO8351-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/NETWO8351-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/166.107.80.0"
},
{
"href": "https://whois.arin.net/rest/poc/NETWO8351-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/166.107.80.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"Alameda County Network Services"
],
"title": "Registration Comments"
}
],
"roles": [
"administrative",
"abuse",
"technical",
"noc"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "1221 Oak Street\nOakland\nCA\n94612\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Network Services"
],
[
"org",
{},
"text",
"Alameda County"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-510-383-5000"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2019-11-13T18:54:16-05:00"
},
{
"eventAction": "registration",
"eventDate": "1993-12-03T00:00:00-05:00"
}
],
"handle": "ACDP",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ACDP",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/166.107.80.0"
},
{
"href": "https://whois.arin.net/rest/org/ACDP",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/166.107.80.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Alameda County"
],
[
"adr",
{
"label": "1221 Oak Street\nRM 41, ITD Data Center\nOakland\nCA\n94612\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-07-30T18:06:54-04:00"
},
{
"eventAction": "registration",
"eventDate": "2017-11-01T11:36:48-04:00"
}
],
"handle": "NETWO8351-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/NETWO8351-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/166.107.80.0"
},
{
"href": "https://whois.arin.net/rest/poc/NETWO8351-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/166.107.80.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"Alameda County Network Services"
],
"title": "Registration Comments"
}
],
"roles": [
"technical",
"noc",
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "1221 Oak Street\nOakland\nCA\n94612\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Network Services"
],
[
"org",
{},
"text",
"Alameda County"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-510-383-5000"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2021-12-14T20:28:25-05:00"
},
{
"eventAction": "registration",
"eventDate": "1993-12-03T00:00:00-05:00"
}
],
"handle": "NET-166-107-0-0-1",
"ipVersion": "v4",
"links": [
{
"href": "https://rdap.arin.net/registry/ip/166.107.0.0",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/166.107.80.0"
},
{
"href": "https://whois.arin.net/rest/net/NET-166-107-0-0-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/166.107.80.0"
}
],
"name": "ALAMEDA",
"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/166.107.80.0"
}
],
"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/166.107.80.0"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "ip network",
"parentHandle": "NET-166-0-0-0-0",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"cidr0",
"arin_originas0"
],
"startAddress": "166.107.0.0",
"status": [
"active"
],
"type": "DIRECT ALLOCATION"
} Contact details of private individuals are redacted.