AS11160 COSTAR GROUP Inc.

• IPv4 Prefixes

Country	Announced Prefix	Description	Valid ROA	Parent Prefix	RIR
	38.64.74.0/24	PSINet, Inc.		38.0.0.0/8	ARIN
	65.200.12.0/24	COSTAR GROUP, INC		67.232.0.0/13	ARIN
	204.253.48.0/24	COSTAR REALTY		204.252.0.0/14	ARIN

• IPv4 Peers

Country	ASN	Name	Description
	AS3356	LEVEL3	Level 3 Parent, LLC
	AS174	COGENT-174	Cogent Communications
	AS3549	LVLT-3549	Level 3 Parent, LLC
	AS701	UUNET	Verizon Business

• IPv4 Upstreams

Country	ASN	Name	Description
	AS701	UUNET	Verizon Business
	AS3549	LVLT-3549	Level 3 Parent, LLC
	AS3356	LEVEL3	Level 3 Parent, LLC
	AS174	COGENT-174	Cogent Communications

IPv4 Upstream Graph

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IPv4 Upstream Graph

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#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2025, American Registry for Internet Numbers, Ltd.
#


ASNumber:       11160
ASName:         COSTAR-SANDIEGO
ASHandle:       AS11160
RegDate:        1998-05-01
Updated:        2024-08-01    
Ref:            https://rdap.arin.net/registry/autnum/11160


OrgName:        COSTAR GROUP Inc.
OrgId:          COSTAR-2
Address:        1331 L St N.W.
City:           Washington
StateProv:      DC
PostalCode:     20005-4293
Country:        US
RegDate:        2000-01-06
Updated:        2024-08-12
Ref:            https://rdap.arin.net/registry/entity/COSTAR-2


OrgDNSHandle: CNT13-ARIN
OrgDNSName:   Costar Network Team
OrgDNSPhone:  +1-202-336-6960 
OrgDNSEmail:  costarnetworkteam@costar.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/CNT13-ARIN

OrgAbuseHandle: CNT13-ARIN
OrgAbuseName:   Costar Network Team
OrgAbusePhone:  +1-202-336-6960 
OrgAbuseEmail:  costarnetworkteam@costar.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/CNT13-ARIN

OrgTechHandle: STONG5-ARIN
OrgTechName:   Stong, Ian 
OrgTechPhone:  +1-202-336-6960 
OrgTechEmail:  istong@costar.com
OrgTechRef:    https://rdap.arin.net/registry/entity/STONG5-ARIN

OrgRoutingHandle: CNT13-ARIN
OrgRoutingName:   Costar Network Team
OrgRoutingPhone:  +1-202-336-6960 
OrgRoutingEmail:  costarnetworkteam@costar.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/CNT13-ARIN

OrgAbuseHandle: STONG5-ARIN
OrgAbuseName:   Stong, Ian 
OrgAbusePhone:  +1-202-336-6960 
OrgAbuseEmail:  istong@costar.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/STONG5-ARIN

OrgNOCHandle: CNT13-ARIN
OrgNOCName:   Costar Network Team
OrgNOCPhone:  +1-202-336-6960 
OrgNOCEmail:  costarnetworkteam@costar.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/CNT13-ARIN

OrgTechHandle: CNT13-ARIN
OrgTechName:   Costar Network Team
OrgTechPhone:  +1-202-336-6960 
OrgTechEmail:  costarnetworkteam@costar.com
OrgTechRef:    https://rdap.arin.net/registry/entity/CNT13-ARIN

RTechHandle: MSM74-ARIN
RTechName:   Mascorro, Mathew Santos
RTechPhone:  +1-858-678-4167 
RTechEmail:  mmascorro@costar.com
RTechRef:    https://rdap.arin.net/registry/entity/MSM74-ARIN

RTechHandle: GPG-ARIN
RTechName:   Guidi, Gino Pietro
RTechPhone:  +1-858-578-3000 
RTechEmail:  gguidi@costar.com
RTechRef:    https://rdap.arin.net/registry/entity/GPG-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2025, American Registry for Internet Numbers, Ltd.
#