AS33551 Sisters of Mercy Health System

SISTERS-OF-MERCY-HEALTH-SYSTEM - Sisters of Mercy Health System · registered in the United States

IPv4 addresses7,93611 prefixes · <0.001% of announced IPv4

Rank in United States#3,473largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#11,027of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS33551 in ASN lookup Look up an IP in this network (170.29.0.1) All networks in United States

IPv4 prefixes

All 11 prefixes, in address order.

170.29.0.0/21
170.29.9.0/24
170.29.10.0/23
170.29.12.0/24
170.29.30.0/24
170.29.32.0/21
170.29.64.0/23
170.29.66.0/24
170.29.68.0/22
170.29.72.0/23
170.29.144.0/24

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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