AS17161 Marsh Inc.

MMC - Marsh Inc. · registered in the United States

IPv4 addresses28,41617 prefixes · <0.001% of announced IPv4

Rank in United States#1,839largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#5,150of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS17161 in ASN lookup Look up an IP in this network (167.245.3.1) All networks in United States

IPv4 prefixes

All 17 prefixes, in address order.

167.245.3.0/24
167.245.8.0/21
167.245.16.0/20
167.245.32.0/21
167.245.40.0/22
167.245.100.0/23
167.245.104.0/22
167.245.108.0/23
167.245.159.0/24
167.245.160.0/19
205.156.72.0/24
205.156.84.0/24
205.156.128.0/20
205.156.144.0/21
205.156.152.0/22
205.156.160.0/23
205.156.164.0/24

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AS40628#1840 OKLAHOMA-OMES - Oklahoma Office of Management & Enterprise Services28,416

AS395577#1841 ITHACA-COLLEGE - Ithaca College28,416

AS29825#1842 IIT-NETWORK-AS - Illinois Institute of Technology28,160

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