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AS291 ESnet | 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

ESnet es.net

US 1 Routes

AS Data

AS291

AS291 – ESnet

AS Number	291
AS Name	ESNET-EAST
Organization	ESnet(ensn-z)
Country	US
Website	es.net
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	ISP
Registry	ARIN
Date Allocated	1997-06-17

ASN Intelligence API for production workflows

Use ASN data for AS291 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
198.124.0.0/14	AS291	ESnet	ESnet	262144

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:       291
ASName:         ESNET-EAST
ASHandle:       AS291
RegDate:        1997-06-17
Updated:        2012-04-02    
Ref:            https://rdap.arin.net/registry/autnum/291


OrgName:        ESnet
OrgId:          ENSN-Z
Address:        Berkeley Lab
Address:        1 Cyclotron Road MS 59R3103
City:           Berkeley
StateProv:      CA
PostalCode:     94720
Country:        US
RegDate:        2010-01-22
Updated:        2023-10-04
Ref:            https://rdap.arin.net/registry/entity/ENSN-Z


OrgAbuseHandle: EH1-ARIN
OrgAbuseName:   Energy Sciences Network
OrgAbusePhone:  +1-510-486-7607 
OrgAbuseEmail:  hostmaster@es.net
OrgAbuseRef:    https://rdap.arin.net/registry/entity/EH1-ARIN

OrgTechHandle: EH1-ARIN
OrgTechName:   Energy Sciences Network
OrgTechPhone:  +1-510-486-7607 
OrgTechEmail:  hostmaster@es.net
OrgTechRef:    https://rdap.arin.net/registry/entity/EH1-ARIN

RTechHandle: EH1-ARIN
RTechName:   Energy Sciences Network
RTechPhone:  +1-510-486-7607 
RTechEmail:  hostmaster@es.net
RTechRef:    https://rdap.arin.net/registry/entity/EH1-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
AS293	ESnet	US

Upstreams

AS Number	Description	Country
AS293	ESnet	US

Frequently Asked Questions

What is ASN AS291?

ASN AS291 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS291?

AS291 is listed under ESnet.

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.