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	Prefix	Description
	38.98.99.0/24	SL Green Realty Corp.

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS174	Cogent Communications, LLC	✔	✘
	AS54004	Cablevision Lightpath LLC	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS174	Cogent Communications, LLC	✔	✘
	AS54004	Cablevision Lightpath LLC	✔	✘
	AS1239	Sprint Wireline (Cogent)	✔	✘

ASHandle:       AS27457
OrgID:          SGRC-1
ASName:         SLG-2
ASNumber:       27457
RegDate:        2017-10-27
Updated:        2017-10-27
Source:         ARIN



OrgID:          SGRC-1
OrgName:        SL Green Realty Corp
CanAllocate:    
Street:         420 Lexington Ave 18th Floor
City:           NY
State/Prov:     NY
Country:        US
PostalCode:     10170
RegDate:        2008-04-25
Updated:        2024-11-25
OrgAdminHandle: ENGIN81-ARIN
OrgTechHandle:  ENGIN81-ARIN
OrgAbuseHandle: ENGIN81-ARIN
OrgNOCHandle:   ENGIN81-ARIN
Source:         ARIN





OrgAdminHandle:       ENGIN81-ARIN
OrgAdminName:          Engineering
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        ENGIN81-ARIN
OrgTechName:           Engineering
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       ENGIN81-ARIN
OrgAbuseName:          Engineering
# Email removed, Log into bgp.tools to see whois emails


OrgNOCHandle:         ENGIN81-ARIN
OrgNOCName:            Engineering
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2026-02-17T03:26:24Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
ARIN	as6128:as-customers	776