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.

AS27245 HEIDRICK | 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

HEIDRICK heidrick.com

US 1 Routes

AS Data

AS27245

AS27245 – HEIDRICK

AS Number	27245
AS Name	HEIDRICK-CHICAGO
Organization	HEIDRICK(heidr)
Country	US
Website	heidrick.com
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	ISP
Registry	ARIN
Date Allocated	2003-01-29

ASN Intelligence API for production workflows

Use ASN data for AS27245 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

Get ASN API Key ASN API Docs

IP Ranges

Route	Origin	Origin Name	ISP	# IPs
38.98.145.0/24	AS27245	HEIDRICK	Heidrick & Struggles Intl., 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:       27245
ASName:         HEIDRICK-CHICAGO
ASHandle:       AS27245
RegDate:        2003-01-29
Updated:        2012-03-20    
Ref:            https://rdap.arin.net/registry/autnum/27245


OrgName:        HEIDRICK
OrgId:          HEIDR
Address:        SEARS TOWER, STE 4200
Address:        233 S. WACKER DRIVE
City:           CHICAGO
StateProv:      IL
PostalCode:     60606
Country:        US
RegDate:        2003-01-17
Updated:        2011-09-24
Ref:            https://rdap.arin.net/registry/entity/HEIDR


OrgAbuseHandle: DV330-ARIN
OrgAbuseName:   Voss, David 
OrgAbusePhone:  +1-312-496-1595 
OrgAbuseEmail:  dvoss@heidrick.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/DV330-ARIN

OrgTechHandle: DV330-ARIN
OrgTechName:   Voss, David 
OrgTechPhone:  +1-312-496-1595 
OrgTechEmail:  dvoss@heidrick.com
OrgTechRef:    https://rdap.arin.net/registry/entity/DV330-ARIN

RTechHandle: DV330-ARIN
RTechName:   Voss, David 
RTechPhone:  +1-312-496-1595 
RTechEmail:  dvoss@heidrick.com
RTechRef:    https://rdap.arin.net/registry/entity/DV330-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
AS7018	AT&T Enterprises, LLC	US
AS1239	Cogent Communications, LLC	US
AS174	Cogent Communications, LLC	US

Upstreams

AS Number	Description	Country
AS7018	AT&T Enterprises, LLC	US
AS174	Cogent Communications, LLC	US

Frequently Asked Questions

What is ASN AS27245?

ASN AS27245 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS27245?

AS27245 is listed under HEIDRICK.

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.