AS399066 Massachusetts Medical Society

MMS-PUBLIC-AS01 - Massachusetts Medical Society · registered in the United States

IPv4 addresses5122 prefixes · <0.001% of announced IPv4

Rank in United States#12,479largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#58,475of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS399066 in ASN lookup Look up an IP in this network (216.120.168.1) All networks in United States

IPv4 prefixes

All 2 prefixes, in address order.

216.120.168.0/24
216.120.172.0/24

Similar-sized networks in United States

ASNNameIPv4 addresses

AS399028#12476 MEADO-ASN-01 - Meadowbrook, Inc.512

AS399036#12477 XIGENT-SOLUTIONS - Xigent Solutions, LLC512

AS399046#12478 DRPA-ASN-01 - The Delaware River Port Authority512

AS399071#12480 BELLIN-MEMORIAL-HOSPITAL - Bellin Memorial Hospital, Inc.512

AS399076#12481 BAYER-MEX - Bayer Corporation512

AS399090#12482 GINKGOBIOWORKS - Ginkgo Bioworks, Inc.512

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources