ASN AS40841 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS40841?

AS40841 is listed under MARKETAXESS HOLDINGS, 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?

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AS40841 MARKETAXESS HOLDINGS, INC.

ASN Lookup Tool

MARKETAXESS HOLDINGS, INC. marketaxess.com

US 14 Routes

AS Data

AS40841

AS40841 – MARKETAXESS HOLDINGS, INC.

AS Number	40841
AS Name	MARKETAXESS-INC-AS
Organization	MARKETAXESS HOLDINGS, INC.(marke-84)
Country	US
Website	marketaxess.com
Number of IPv4 Routes	14
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2008-04-29

ASN Intelligence API for production workflows

Use ASN data for AS40841 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
194.69.74.0/24	AS40841	MARKETAXESS HOLDINGS, INC.	MARKETAXESS POST TRADE LIMITED	256
192.69.225.0/24	AS40841	MARKETAXESS HOLDINGS, INC.	MARKETAXESS HOLDINGS, INC.	256
194.69.82.0/24	AS40841	MARKETAXESS HOLDINGS, INC.	Trax TEST Inter	256
204.128.52.0/24	AS40841	MARKETAXESS HOLDINGS, INC.	MARKETAXESS HOLDINGS, INC.	256
38.108.243.0/24	AS40841	MARKETAXESS HOLDINGS, INC.	MarketAxess	256
194.69.74.0/23	AS40841	MARKETAXESS HOLDINGS, INC.	MARKETAXESS POST TRADE LIMITED	512
194.69.75.0/24	AS40841	MARKETAXESS HOLDINGS, INC.	MARKETAXESS POST TRADE LIMITED	256
204.128.54.0/24	AS40841	MARKETAXESS HOLDINGS, INC.	MARKETAXESS HOLDINGS, INC.	256
204.128.55.0/24	AS40841	MARKETAXESS HOLDINGS, INC.	MARKETAXESS HOLDINGS, INC.	256
194.69.80.0/24	AS40841	MARKETAXESS HOLDINGS, INC.	TRAX Production Inter	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:       40841
ASName:         MARKETAXESS-INC-AS
ASHandle:       AS40841
RegDate:        2008-04-29
Updated:        2022-09-06
Comment:        Coontact MarketAxess Holdings Inc. at (212) 813-6111 or network@marketaxess.com for any questions or comments.    
Ref:            https://rdap.arin.net/registry/autnum/40841


OrgName:        MARKETAXESS HOLDINGS, INC.
OrgId:          MARKE-84
Address:        299 Park Avenue, 10th Floor
City:           NEW YORK
StateProv:      NY
PostalCode:     10171
Country:        US
RegDate:        2008-04-15
Updated:        2022-09-06
Ref:            https://rdap.arin.net/registry/entity/MARKE-84


OrgTechHandle: NEMH-ARIN
OrgTechName:   Network Engineering - MarketAxess Holdings inc
OrgTechPhone:  +1-212-813-6111 
OrgTechEmail:  NETWORK@marketaxess.com
OrgTechRef:    https://rdap.arin.net/registry/entity/NEMH-ARIN

OrgNOCHandle: NEMH-ARIN
OrgNOCName:   Network Engineering - MarketAxess Holdings inc
OrgNOCPhone:  +1-212-813-6111 
OrgNOCEmail:  NETWORK@marketaxess.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/NEMH-ARIN

OrgAbuseHandle: NEMH-ARIN
OrgAbuseName:   Network Engineering - MarketAxess Holdings inc
OrgAbusePhone:  +1-212-813-6111 
OrgAbuseEmail:  NETWORK@marketaxess.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NEMH-ARIN

RTechHandle: NEMH-ARIN
RTechName:   Network Engineering - MarketAxess Holdings inc
RTechPhone:  +1-212-813-6111 
RTechEmail:  NETWORK@marketaxess.com
RTechRef:    https://rdap.arin.net/registry/entity/NEMH-ARIN

RAbuseHandle: NEMH-ARIN
RAbuseName:   Network Engineering - MarketAxess Holdings inc
RAbusePhone:  +1-212-813-6111 
RAbuseEmail:  NETWORK@marketaxess.com
RAbuseRef:    https://rdap.arin.net/registry/entity/NEMH-ARIN

RNOCHandle: NEMH-ARIN
RNOCName:   Network Engineering - MarketAxess Holdings inc
RNOCPhone:  +1-212-813-6111 
RNOCEmail:  NETWORK@marketaxess.com
RNOCRef:    https://rdap.arin.net/registry/entity/NEMH-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
AS8220	COLT Technology Services Group Limited	GB
AS3549	Level 3 Communications, Inc. (GBLX)	US
AS1239	Cogent Communications, LLC	US
AS3257	GTT Communications Inc.	US
AS40481	G3 Group	US
AS3356	Level 3 Parent, LLC	US
AS6461	Zayo Bandwidth	US
AS174	Cogent Communications, LLC	US

Upstreams

AS Number	Description	Country
AS8220	COLT Technology Services Group Limited	GB
AS3257	GTT Communications Inc.	US
AS3356	Level 3 Parent, LLC	US
AS6461	Zayo Bandwidth	US
AS174	Cogent Communications, LLC	US

Downstreams

AS Number	Description	Country
AS40481	G3 Group	US