AS Number
AS19721
AS Name
MHN
Org Name
Magellan Health Services
Registry

arin

RegDate

2001-02-07

Updated

2026-06-05

AS19721 Looking Glass
IPv4Prefixes

14

IPv6Prefixes

0

IPv4 NUMs

8,192

IPv6 NUMs(/64)

0

8,192 IPv4 Addresses
CIDR Description IP Num
204.193.64.0/20
IRR Valid
MagellanBehavioralHealth 4096
204.193.64.0/19
IRR InValid
MagellanBehavioralHealth 8192
204.193.71.0/24
IRR Parent Valid
MagellanBehavioralHealth 256
204.193.72.0/24
IRR Parent Valid
MagellanBehavioralHealth 256
204.193.74.0/24
IRR Parent Valid
MagellanBehavioralHealth 256
204.193.75.0/24
IRR Parent Valid
MagellanBehavioralHealth 256
204.193.80.0/24
IRR Parent Valid
MagellanBehavioralHealth 256
204.193.80.0/20
IRR Valid
MagellanBehavioralHealth 4096
204.193.84.0/24
IRR Valid
MagellanBehavioralHealth 256
204.193.84.0/22
IRR InValid
MagellanBehavioralHealth 1024
204.193.85.0/24
IRR Valid
MagellanBehavioralHealth 256
204.193.86.0/23
IRR Valid
MagellanBehavioralHealth 512
204.193.88.0/24
IRR Parent Valid
MagellanBehavioralHealth 256
204.193.93.0/24
IRR Parent Valid
MagellanBehavioralHealth 256
AS Description Country/Region IPv4 NUMs IPv6 NUMs IPv4 IPv6
AS3356 LEVEL3 - Level 3 Parent, LLC, US United States 28,876,544 81,609,621,504 IPv4 IPv4
AS49915 MEGAPORT - Megaport (UK) Limited, GB United Kingdom 32,000 2,490,368 IPv4 IPv4
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:        2026-06-05
Ref:            https://rdap.arin.net/registry/entity/MHS-54


OrgNOCHandle: STLNE-ARIN
OrgNOCName:   stlnetengineering
OrgNOCPhone:  +1-314-387-4000 
OrgNOCEmail:  [email protected]
OrgNOCRef:    https://rdap.arin.net/registry/entity/STLNE-ARIN

OrgTechHandle: STLNE-ARIN
OrgTechName:   stlnetengineering
OrgTechPhone:  +1-314-387-4000 
OrgTechEmail:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/STLNE-ARIN

OrgAbuseHandle: HEAPB-ARIN
OrgAbuseName:   Heap, Brandon 
OrgAbusePhone:  +1-801-367-9127 
OrgAbuseEmail:  [email protected]
OrgAbuseRef:    https://rdap.arin.net/registry/entity/HEAPB-ARIN

OrgNOCHandle: WEBBA33-ARIN
OrgNOCName:   Webb, Arron 
OrgNOCPhone:  +1-832-622-0113 
OrgNOCEmail:  [email protected]
OrgNOCRef:    https://rdap.arin.net/registry/entity/WEBBA33-ARIN

OrgTechHandle: WEBBA33-ARIN
OrgTechName:   Webb, Arron 
OrgTechPhone:  +1-832-622-0113 
OrgTechEmail:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/WEBBA33-ARIN

OrgAbuseHandle: STLNE-ARIN
OrgAbuseName:   stlnetengineering
OrgAbusePhone:  +1-314-387-4000 
OrgAbuseEmail:  [email protected]
OrgAbuseRef:    https://rdap.arin.net/registry/entity/STLNE-ARIN

OrgNOCHandle: HEAPB-ARIN
OrgNOCName:   Heap, Brandon 
OrgNOCPhone:  +1-801-367-9127 
OrgNOCEmail:  [email protected]
OrgNOCRef:    https://rdap.arin.net/registry/entity/HEAPB-ARIN

OrgTechHandle: HEAPB-ARIN
OrgTechName:   Heap, Brandon 
OrgTechPhone:  +1-801-367-9127 
OrgTechEmail:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/HEAPB-ARIN

OrgDNSHandle: WEBBA33-ARIN
OrgDNSName:   Webb, Arron 
OrgDNSPhone:  +1-832-622-0113 
OrgDNSEmail:  [email protected]
OrgDNSRef:    https://rdap.arin.net/registry/entity/WEBBA33-ARIN

OrgRoutingHandle: WEBBA33-ARIN
OrgRoutingName:   Webb, Arron 
OrgRoutingPhone:  +1-832-622-0113 
OrgRoutingEmail:  [email protected]
OrgRoutingRef:    https://rdap.arin.net/registry/entity/WEBBA33-ARIN

OrgDNSHandle: HEAPB-ARIN
OrgDNSName:   Heap, Brandon 
OrgDNSPhone:  +1-801-367-9127 
OrgDNSEmail:  [email protected]
OrgDNSRef:    https://rdap.arin.net/registry/entity/HEAPB-ARIN

OrgRoutingHandle: HEAPB-ARIN
OrgRoutingName:   Heap, Brandon 
OrgRoutingPhone:  +1-801-367-9127 
OrgRoutingEmail:  [email protected]
OrgRoutingRef:    https://rdap.arin.net/registry/entity/HEAPB-ARIN

OrgAbuseHandle: WEBBA33-ARIN
OrgAbuseName:   Webb, Arron 
OrgAbusePhone:  +1-832-622-0113 
OrgAbuseEmail:  [email protected]
OrgAbuseRef:    https://rdap.arin.net/registry/entity/WEBBA33-ARIN

RTechHandle: DB1528-ARIN
RTechName:   Brack, David 
RTechPhone:  +1-314-387-4055 
RTechEmail:  [email protected]
RTechRef:    https://rdap.arin.net/registry/entity/DB1528-ARIN