ASN AS21754 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS21754?

AS21754 is listed under Markel Corporation.

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.

AS21754 Markel Corporation | IPGeolocation.io

ASN Lookup Tool

Markel Corporation markelcorp.com

US 1 Routes

AS Data

AS21754

AS21754 – Markel Corporation

AS Number	21754
AS Name	MARKEL-CORPORATION
Organization	Markel Corporation(markel-1)
Country	US
Website	markelcorp.com
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2001-06-15

ASN Intelligence API for production workflows

Use ASN data for AS21754 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
8.22.166.0/24	AS21754	Markel Corporation	Level 3 Parent, LLC	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:       21754
ASName:         MARKEL-CORPORATION
ASHandle:       AS21754
RegDate:        2001-06-15
Updated:        2012-02-24    
Ref:            https://rdap.arin.net/registry/autnum/21754


OrgName:        Markel Corporation
OrgId:          MARKEL-1
Address:        4501 Highwoods Parkway
City:           Glen Allen
StateProv:      VA
PostalCode:     23060
Country:        US
RegDate:        2001-06-15
Updated:        2017-04-11
Ref:            https://rdap.arin.net/registry/entity/MARKEL-1


OrgAbuseHandle: STB3-ARIN
OrgAbuseName:   Blosser, Sean T
OrgAbusePhone:  +1-804-539-3033 
OrgAbuseEmail:  sean.blosser@markel.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/STB3-ARIN

OrgAbuseHandle: HURDE-ARIN
OrgAbuseName:   Hurdelbrink, Paul 
OrgAbusePhone:  +1-804-565-1997 
OrgAbuseEmail:  paul.hurdelbrink@markel.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/HURDE-ARIN

OrgTechHandle: STB3-ARIN
OrgTechName:   Blosser, Sean T
OrgTechPhone:  +1-804-539-3033 
OrgTechEmail:  sean.blosser@markel.com
OrgTechRef:    https://rdap.arin.net/registry/entity/STB3-ARIN

OrgTechHandle: HURDE-ARIN
OrgTechName:   Hurdelbrink, Paul 
OrgTechPhone:  +1-804-565-1997 
OrgTechEmail:  paul.hurdelbrink@markel.com
OrgTechRef:    https://rdap.arin.net/registry/entity/HURDE-ARIN

RTechHandle: RB1536-ARIN
RTechName:   Boyle, Rory 
RTechPhone:  +1-804-965-1692 
RTechEmail:  rboyle@markelcorp.com
RTechRef:    https://rdap.arin.net/registry/entity/RB1536-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
AS3549	Level 3 Communications, Inc. (GBLX)	US
AS3356	Level 3 Parent, LLC	US

Upstreams

AS Number	Description	Country
AS3356	Level 3 Parent, LLC	US