ASN Lookup Tool

Mizuho Americas Services LLC mizuhogroup.com US US 4 Routes

AS Data

AS20129

AS20129 – Mizuho Americas Services LLC

AS Number 20129
AS Name MAS-NJDC
Organization Mizuho Americas Services LLC(masl-12)
Country US
Website mizuhogroup.com
Number of IPv4 Routes 4
Number of IPv6 Routes 0
ASN type BUSINESS
Registry ARIN
Date Allocated 2001-03-28

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Use ASN data for AS20129 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route # IPs
8.11.195.0/24 256
192.129.92.0/24 256
208.85.105.0/24 256
208.85.107.0/24 256

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:       20129
ASName:         MAS-NJDC
ASHandle:       AS20129
RegDate:        2001-03-28
Updated:        2022-11-30    
Ref:            https://rdap.arin.net/registry/autnum/20129


OrgName:        Mizuho Americas Services LLC
OrgId:          MASL-12
Address:        1271 Avenue of the Americas
City:           New York
StateProv:      NY
PostalCode:     10020
Country:        US
RegDate:        2022-09-19
Updated:        2026-01-29
Ref:            https://rdap.arin.net/registry/entity/MASL-12


OrgNOCHandle: NETWO3673-ARIN
OrgNOCName:   Network Team
OrgNOCPhone:  +1-212-209-9493 
OrgNOCEmail:  NetworkTeam@mizuhogroup.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/NETWO3673-ARIN

OrgTechHandle: NETWO3673-ARIN
OrgTechName:   Network Team
OrgTechPhone:  +1-212-209-9493 
OrgTechEmail:  NetworkTeam@mizuhogroup.com
OrgTechRef:    https://rdap.arin.net/registry/entity/NETWO3673-ARIN

OrgTechHandle: SETER5-ARIN
OrgTechName:   Seter, Shawn 
OrgTechPhone:  +1-312-294-8620 
OrgTechEmail:  shawn.seter@mizuhogroup.com
OrgTechRef:    https://rdap.arin.net/registry/entity/SETER5-ARIN

OrgAbuseHandle: NETWO3673-ARIN
OrgAbuseName:   Network Team
OrgAbusePhone:  +1-212-209-9493 
OrgAbuseEmail:  NetworkTeam@mizuhogroup.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NETWO3673-ARIN

OrgTechHandle: LANKI-ARIN
OrgTechName:   Lankios, Alex 
OrgTechPhone:  +1-212-209-9344 
OrgTechEmail:  alex.lankios@mizuhogroup.com
OrgTechRef:    https://rdap.arin.net/registry/entity/LANKI-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
AS32787 Akamai Technologies, Inc. US

Upstreams

AS Number Description Country
AS32787 Akamai Technologies, Inc. US

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Frequently Asked Questions

ASN AS20129 is an Autonomous System Number used to identify a network for BGP internet routing.
AS20129 is listed under Mizuho Americas Services LLC.
Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.
Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.
WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.
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.