What is ASN AS399066?

ASN AS399066 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS399066?

AS399066 is listed under Massachusetts Medical Society.

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.

AS399066 Massachusetts Medical Society

ASN Lookup Tool

Massachusetts Medical Society mms.org

US 2 Routes

AS Data

AS399066

AS399066 – Massachusetts Medical Society

AS Number	399066
AS Name	MMS-PUBLIC-AS01
Organization	Massachusetts Medical Society(mms-5)
Country	US
Website	mms.org
Number of IPv4 Routes	2
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2020-11-17

ASN Intelligence API for production workflows

Use ASN data for AS399066 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
216.120.168.0/24	AS399066	Massachusetts Medical Society	Massachusetts Medical Society	256
216.120.172.0/24	AS399066	Massachusetts Medical Society	Massachusetts Medical Society	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:       399066
ASName:         MMS-PUBLIC-AS01
ASHandle:       AS399066
RegDate:        2020-11-17
Updated:        2020-11-17    
Ref:            https://rdap.arin.net/registry/autnum/399066


OrgName:        Massachusetts Medical Society
OrgId:          MMS-5
Address:        860 Winter Street
City:           Waltham
StateProv:      MA
PostalCode:     02154
Country:        US
RegDate:        1997-07-25
Updated:        2024-11-25
Ref:            https://rdap.arin.net/registry/entity/MMS-5


OrgNOCHandle: KLING5-ARIN
OrgNOCName:   Kling, Doug 
OrgNOCPhone:  +1-978-219-6814 
OrgNOCEmail:  dkling@mms.org
OrgNOCRef:    https://rdap.arin.net/registry/entity/KLING5-ARIN

OrgDNSHandle: KLING5-ARIN
OrgDNSName:   Kling, Doug 
OrgDNSPhone:  +1-978-219-6814 
OrgDNSEmail:  dkling@mms.org
OrgDNSRef:    https://rdap.arin.net/registry/entity/KLING5-ARIN

OrgAbuseHandle: MMSIT-ARIN
OrgAbuseName:   MMS IT
OrgAbusePhone:  +1-781-434-7712 
OrgAbuseEmail:  lan@mms.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/MMSIT-ARIN

OrgTechHandle: KLING5-ARIN
OrgTechName:   Kling, Doug 
OrgTechPhone:  +1-978-219-6814 
OrgTechEmail:  dkling@mms.org
OrgTechRef:    https://rdap.arin.net/registry/entity/KLING5-ARIN

OrgTechHandle: MMSIT-ARIN
OrgTechName:   MMS IT
OrgTechPhone:  +1-781-434-7712 
OrgTechEmail:  lan@mms.org
OrgTechRef:    https://rdap.arin.net/registry/entity/MMSIT-ARIN

OrgAbuseHandle: KLING5-ARIN
OrgAbuseName:   Kling, Doug 
OrgAbusePhone:  +1-978-219-6814 
OrgAbuseEmail:  dkling@mms.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/KLING5-ARIN

OrgRoutingHandle: KLING5-ARIN
OrgRoutingName:   Kling, Doug 
OrgRoutingPhone:  +1-978-219-6814 
OrgRoutingEmail:  dkling@mms.org
OrgRoutingRef:    https://rdap.arin.net/registry/entity/KLING5-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
AS13837	Point5 Managed Services, LLC	US

Upstreams

AS Number	Description	Country
AS13837	Point5 Managed Services, LLC	US