AS12122 St. Joseph Health System

STJHS - St. Joseph Health System · registered in the United States

IPv4 addresses2,8167 prefixes · <0.001% of announced IPv4

Rank in United States#5,467largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#19,350of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS12122 in ASN lookup Look up an IP in this network (156.72.6.1) All networks in United States

IPv4 prefixes

All 7 prefixes, in address order.

156.72.6.0/23
156.72.30.0/23
156.72.60.0/23
156.72.150.0/24
156.72.153.0/24
156.72.155.0/24
156.72.160.0/23

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AS13729#5469 FIDESSA-US - Fidessa Corporation2,816

AS13824#5470 AIREBEAM - AireBeam2,816

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