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AS13599 Eisai Inc. | IPGeolocation.io

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

Eisai Inc. eisai.com

US 1 Routes

AS Data

AS13599

AS13599 – Eisai Inc.

AS Number	13599
AS Name	13599
Organization	Eisai Inc.(eisai-1)
Country	US
Website	eisai.com
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2015-10-27

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Use ASN data for AS13599 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
173.251.54.0/24	AS13599	Eisai Inc.	EISAI INC	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:       13599
ASName:         13599
ASHandle:       AS13599
RegDate:        2015-10-27
Updated:        2024-08-14    
Ref:            https://rdap.arin.net/registry/autnum/13599


OrgName:        Eisai Inc.
OrgId:          EISAI-1
Address:        500 Frank W. Burr Blvd.
Address:        5th Floor
City:           Teaneck
StateProv:      NJ
PostalCode:     07666
Country:        US
RegDate:        2004-03-04
Updated:        2015-09-09
Ref:            https://rdap.arin.net/registry/entity/EISAI-1


OrgTechHandle: CALAH-ARIN
OrgTechName:   Calahorrano, Edwin 
OrgTechPhone:  +1-201-364-8161 
OrgTechEmail:  Edwin_Calahorrano@eisai.com
OrgTechRef:    https://rdap.arin.net/registry/entity/CALAH-ARIN

OrgAbuseHandle: MPH11-ARIN
OrgAbuseName:   Phillips, Michael 
OrgAbusePhone:  +1-201-746-2392 
OrgAbuseEmail:  Michael_Phillips@eisai.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/MPH11-ARIN

OrgTechHandle: MPH11-ARIN
OrgTechName:   Phillips, Michael 
OrgTechPhone:  +1-201-746-2392 
OrgTechEmail:  Michael_Phillips@eisai.com
OrgTechRef:    https://rdap.arin.net/registry/entity/MPH11-ARIN

RTechHandle: DINGL28-ARIN
RTechName:   Dinglasan, Ivan 
RTechPhone:  +1-862-440-5260 
RTechEmail:  Ivan_Dinglasan@eisai.com
RTechRef:    https://rdap.arin.net/registry/entity/DINGL28-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
AS54004	Cablevision Lightpath LLC	US

Upstreams

AS Number	Description	Country
AS46887	Crown Castle Fiber LLC	US
AS54004	Cablevision Lightpath LLC	US

Frequently Asked Questions

What is ASN AS13599?

ASN AS13599 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS13599?

AS13599 is listed under Eisai Inc..

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.