AS26305 SSM Health Care

ASN-SSM - SSM Health Care · registered in the United States

IPv4 addresses67,58410 prefixes · 0.002% of announced IPv4

Rank in United States#834largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#2,557of 79,396 networks with IPv4

IPv64,096 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS26305 in ASN lookup Look up an IP in this network (67.66.136.1) All networks in United States

IPv4 prefixes

All 10 prefixes, in address order.

67.66.136.0/21
165.104.0.0/23
165.104.2.0/24
165.104.3.0/24
165.104.4.0/22
165.104.8.0/21
165.104.16.0/20
165.104.32.0/19
165.104.64.0/18
165.104.128.0/17

IPv6 prefixes

All 1 prefix.

2620:1f6::/36

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AS344#835 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD)67,584

AS10326#836 WPI - Worcester Polytechnic Institute67,584

AS63#837 LL-MI - Massachusetts Institute of Technology67,584

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