ASN Lookup Tool

Magellan Health Services magellanhealth.com US US 14 Routes

AS Data

AS19721

AS19721 – Magellan Health Services

AS Number 19721
AS Name MHN
Organization Magellan Health Services(mhs-54)
Country US
Website magellanhealth.com
Number of IPv4 Routes 14
Number of IPv6 Routes 0
ASN type BUSINESS
Registry ARIN
Date Allocated 2001-02-07

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Use ASN data for AS19721 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route # IPs
204.193.86.0/23 512
204.193.84.0/24 256
204.193.74.0/24 256
204.193.71.0/24 256
204.193.80.0/24 256
204.193.93.0/24 256
204.193.80.0/20 4096
204.193.75.0/24 256
204.193.64.0/20 4096
204.193.72.0/24 256

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:       19721
ASName:         MHN
ASHandle:       AS19721
RegDate:        2001-02-07
Updated:        2012-03-20    
Ref:            https://rdap.arin.net/registry/autnum/19721


OrgName:        Magellan Health Services
OrgId:          MHS-54
Address:        13736 Riverport Dr.
City:           Maryland Heights
StateProv:      MO
PostalCode:     63043
Country:        US
RegDate:        2001-02-07
Updated:        2018-01-16
Ref:            https://rdap.arin.net/registry/entity/MHS-54


OrgAbuseHandle: STLNE-ARIN
OrgAbuseName:   stlnetengineering
OrgAbusePhone:  +1-314-387-4000 
OrgAbuseEmail:  NetworkInfrastructure@magellanhealth.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/STLNE-ARIN

OrgTechHandle: STLNE-ARIN
OrgTechName:   stlnetengineering
OrgTechPhone:  +1-314-387-4000 
OrgTechEmail:  NetworkInfrastructure@magellanhealth.com
OrgTechRef:    https://rdap.arin.net/registry/entity/STLNE-ARIN

OrgNOCHandle: STLNE-ARIN
OrgNOCName:   stlnetengineering
OrgNOCPhone:  +1-314-387-4000 
OrgNOCEmail:  NetworkInfrastructure@magellanhealth.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/STLNE-ARIN

RTechHandle: DB1528-ARIN
RTechName:   Brack, David 
RTechPhone:  +1-314-387-4055 
RTechEmail:  dabrack@magellanhealth.com
RTechRef:    https://rdap.arin.net/registry/entity/DB1528-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
AS49915 Megaport UK Limited GB
AS3549 Level 3 Communications, Inc. (GBLX) US
AS49915 Megaport (UK) Limited GB
AS3356 Level 3 Parent, LLC US

Upstreams

AS Number Description Country
AS49915 Megaport UK Limited GB
AS3356 Level 3 Parent, LLC US

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Frequently Asked Questions

ASN AS19721 is an Autonomous System Number used to identify a network for BGP internet routing.
AS19721 is listed under Magellan Health Services.
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.