ASN AS7203 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS7203?

AS7203 is listed under Leaseweb USA, Inc..

What do peers, upstreams, and downstreams mean in ASN data?

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 shown for an ASN?

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

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS7203 Leaseweb USA, Inc. | IPGeolocation.io

ASN Lookup Tool

Leaseweb USA, Inc. us.leaseweb.com

US 160 Routes

AS Data

AS7203

AS7203 – Leaseweb USA, Inc.

AS Number	7203
AS Name	LEASEWEB-USA-SFO
Organization	Leaseweb USA, Inc.(lu-76)
Country	US
Website	us.leaseweb.com
Number of IPv4 Routes	157
Number of IPv6 Routes	3
ASN type	HOSTING
Registry	ARIN
Date Allocated	1996-10-08

ASN Intelligence API for production workflows

Use ASN data for AS7203 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
152.163.156.0/22	AS7203	Leaseweb USA, Inc.	Leaseweb USA, Inc.	1024
179.61.166.0/24	AS7203	Leaseweb USA, Inc.	Leaseweb USA, Inc.	256
23.83.180.0/22	AS7203	Leaseweb USA, Inc.	Leaseweb USA, Inc.	1024
212.42.205.0/24	AS7203	Leaseweb USA, Inc.	Leaseweb USA, Inc.	256
23.106.44.0/22	AS7203	Leaseweb USA, Inc.	Leaseweb USA, Inc.	1024
172.241.124.0/22	AS7203	Leaseweb USA, Inc.	Leaseweb USA, Inc.	1024
23.81.220.0/22	AS7203	Leaseweb USA, Inc.	Leaseweb USA, Inc.	1024
147.255.160.0/22	AS7203	Leaseweb USA, Inc.	Leaseweb USA, Inc.	1024
23.82.16.0/21	AS7203	Leaseweb USA, Inc.	Leaseweb USA, Inc.	2048
172.241.252.0/22	AS7203	Leaseweb USA, Inc.	Leaseweb USA, Inc.	1024

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:       7203
ASName:         LEASEWEB-USA-SFO
ASHandle:       AS7203
RegDate:        1996-10-08
Updated:        2022-03-31
Comment:        Please send all abuse notifications to the following email address: abuse@us.leaseweb.com. To ensure proper processing of your abuse notification, please visit the website www.leaseweb.com/abuse for notification requirements. All police and other government agency requests must be sent to subpoenas@us.leaseweb.com.    
Ref:            https://rdap.arin.net/registry/autnum/7203


OrgName:        Leaseweb USA, Inc.
OrgId:          LU-76
Address:        1735 Lundy Ave
City:           San Jose
StateProv:      CA
PostalCode:     95131
Country:        US
RegDate:        2015-07-30
Updated:        2016-03-15
Ref:            https://rdap.arin.net/registry/entity/LU-76


OrgAbuseHandle: LUAD3-ARIN
OrgAbuseName:   Leaseweb US abuse dept
OrgAbusePhone:  +1-571-814-3777 
OrgAbuseEmail:  abuse@us.leaseweb.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/LUAD3-ARIN

OrgTechHandle: LEASE-ARIN
OrgTechName:   Leaseweb ARIN
OrgTechPhone:  +1-571-814-3777 
OrgTechEmail:  arin@us.leaseweb.com
OrgTechRef:    https://rdap.arin.net/registry/entity/LEASE-ARIN

RAbuseHandle: LUAD3-ARIN
RAbuseName:   Leaseweb US abuse dept
RAbusePhone:  +1-571-814-3777 
RAbuseEmail:  abuse@us.leaseweb.com
RAbuseRef:    https://rdap.arin.net/registry/entity/LUAD3-ARIN

RNOCHandle: LEASE-ARIN
RNOCName:   Leaseweb ARIN
RNOCPhone:  +1-571-814-3777 
RNOCEmail:  arin@us.leaseweb.com
RNOCRef:    https://rdap.arin.net/registry/entity/LEASE-ARIN

RTechHandle: LEASE-ARIN
RTechName:   Leaseweb ARIN
RTechPhone:  +1-571-814-3777 
RTechEmail:  arin@us.leaseweb.com
RTechRef:    https://rdap.arin.net/registry/entity/LEASE-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
AS1239	Cogent Communications, LLC	US
AS286	GTT Communications Inc.	NL
AS286	GTT Communications Inc.	US
AS3257	GTT Communications Inc.	US
AS174	Cogent Communications, LLC	US

Upstreams

AS Number	Description	Country
AS286	GTT Communications Inc.	US
AS3257	GTT Communications Inc.	US
AS174	Cogent Communications, LLC	US

Contacts

Email Contacts

arin@us.leaseweb.com

Abuse Contacts

abuse@us.leaseweb.com

Legacy Routes

23.19.197.0/24 2607:f5b5:1::/48 2607:f5b5:2::/48 2607:f5b5:3::/48 23.19.196.0/24 2607:f5b5::/48