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AS399208 SL Green Realty Corp

Q: Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

ASN Lookup Tool

SL Green Realty Corp slgreen.com

US 1 Routes

AS Data

AS399208

AS399208 – SL Green Realty Corp

AS Number	399208
AS Name	OVA-BASE-BLDG
Organization	SL Green Realty Corp(sgrc-1)
Country	US
Website	slgreen.com
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2021-01-07

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
65.51.129.0/24	AS399208	SL Green Realty Corp	SL GREEN REALTY CORP	256

Raw Whois Response

#
# 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 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       399208
ASName:         OVA-BASE-BLDG
ASHandle:       AS399208
RegDate:        2021-01-07
Updated:        2021-01-07    
Ref:            https://rdap.arin.net/registry/autnum/399208


OrgName:        SL Green Realty Corp
OrgId:          SGRC-1
Address:        420 Lexington Ave 18th Floor
City:           NY
StateProv:      NY
PostalCode:     10170
Country:        US
RegDate:        2008-04-25
Updated:        2024-11-25
Ref:            https://rdap.arin.net/registry/entity/SGRC-1


OrgNOCHandle: ENGIN81-ARIN
OrgNOCName:   Engineering
OrgNOCPhone:  +1-212-216-1644 
OrgNOCEmail:  misadmin@slgreen.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/ENGIN81-ARIN

OrgAbuseHandle: ENGIN81-ARIN
OrgAbuseName:   Engineering
OrgAbusePhone:  +1-212-216-1644 
OrgAbuseEmail:  misadmin@slgreen.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ENGIN81-ARIN

OrgTechHandle: ENGIN81-ARIN
OrgTechName:   Engineering
OrgTechPhone:  +1-212-216-1644 
OrgTechEmail:  misadmin@slgreen.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ENGIN81-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 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

Peers

AS Number	Description	Country
AS46887	Crown Castle Fiber LLC	US
AS46450	Pilot Fiber, Inc.	US
AS54004	Cablevision Lightpath LLC	US

Upstreams

AS Number	Description	Country
AS46887	Crown Castle Fiber LLC	US
AS46450	Pilot Fiber, Inc.	US
AS54004	Cablevision Lightpath LLC	US

Frequently Asked Questions

What is ASN AS399208?

ASN AS399208 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS399208?

AS399208 is listed under SL Green Realty Corp.

What do peers, upstreams, and downstreams mean?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data included here?

WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access full ASN table data?

This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.