Organization
COSTAR GROUP Inc.
LVLT-COSTAR-2-8-43-77
Location
Washington D.C. (Northwest Washington)
District of Columbia, United States (US)
Hostname
—
Geolocation
United States (US) United States
- Country
- United States (US)
- Region
- District of Columbia
- City
- Washington D.C. (Northwest Washington)
- Continent
- North America
- Coordinates
- 38.904, -77.031 View on map ↗
Network Information
IP Range 8.43.77.0 – 8.43.77.255 CIDR 8.43.77.0/24 Network Name LVLT-COSTAR-2-8-43-77 Handle NET-8-43-77-0-1 Type ASSIGNMENT Parent Network NET-8-8-9-0-3 Organization COSTAR GROUP Inc. Organization ID COSTAR-2 Address 1331 L St N.W., Washington, DC, 20005-4293, United States Country United States (US) Registry ARIN Registered On May 15, 2017 Last Updated Dec 28, 2023 Status
active
ASN & Routing
Origin AS AS14652 AS Name COSTARGROUPASN - COSTAR GROUP Inc., US Announced Prefix 8.43.77.0/24 AS Registry ARIN Prefix Country United States (US) Allocated 1992-12-01 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": "8.43.77.0",
"length": 24
}
],
"endAddress": "8.43.77.255",
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2024-09-19T08:53:31-04:00"
},
{
"eventAction": "registration",
"eventDate": "2018-10-30T16:57:32-04:00"
}
],
"handle": "STONG5-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/STONG5-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/8.43.77.0"
},
{
"href": "https://whois.arin.net/rest/poc/STONG5-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/8.43.77.0"
}
],
"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 2025-09-19"
],
"title": "Unvalidated POC"
}
],
"roles": [
"administrative",
"technical",
"abuse"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "1331 L St N.W.\nWashington\nDC\n20005\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Ian Stong"
],
[
"n",
{},
"text",
[
"Stong",
"Ian",
"",
"",
""
]
],
[
"kind",
{},
"text",
"individual"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-202-336-6960"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-09-02T14:00:35-04:00"
},
{
"eventAction": "registration",
"eventDate": "2024-07-31T15:23:20-04:00"
}
],
"handle": "CNT13-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/CNT13-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/8.43.77.0"
},
{
"href": "https://whois.arin.net/rest/poc/CNT13-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/8.43.77.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"dns",
"abuse",
"noc",
"technical",
"routing"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "1201 Wilson Blvd\nArlington\nVA\n22209\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Costar Network Team"
],
[
"org",
{},
"text",
"CoStar Group"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-800-204-5960"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2024-08-12T14:54:54-04:00"
},
{
"eventAction": "registration",
"eventDate": "2000-01-06T00:00:00-05:00"
}
],
"handle": "COSTAR-2",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/COSTAR-2",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/8.43.77.0"
},
{
"href": "https://whois.arin.net/rest/org/COSTAR-2",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/8.43.77.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"COSTAR GROUP Inc."
],
[
"adr",
{
"label": "1331 L St N.W.\nWashington\nDC\n20005-4293\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2023-12-28T17:24:35-05:00"
},
{
"eventAction": "registration",
"eventDate": "2017-05-15T00:06:32-04:00"
}
],
"handle": "NET-8-43-77-0-1",
"ipVersion": "v4",
"links": [
{
"href": "https://rdap.arin.net/registry/ip/8.43.77.0",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/8.43.77.0"
},
{
"href": "https://whois.arin.net/rest/net/NET-8-43-77-0-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/8.43.77.0"
},
{
"href": "https://rdap.arin.net/registry/ip/8.8.9.0/24",
"rel": "up",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/8.43.77.0"
}
],
"name": "LVLT-COSTAR-2-8-43-77",
"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/8.43.77.0"
}
],
"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/8.43.77.0"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "ip network",
"parentHandle": "NET-8-8-9-0-3",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"cidr0",
"arin_originas0"
],
"startAddress": "8.43.77.0",
"status": [
"active"
],
"type": "ASSIGNMENT"
} Contact details of private individuals are redacted.