AS36407 Software Engineering Institute

CERT - Software Engineering Institute · registered in the United States

IPv4 addresses1,5363 prefixes · <0.001% of announced IPv4

Rank in United States#6,901largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#26,279of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS36407 in ASN lookup Look up an IP in this network (147.72.252.1) All networks in United States

IPv4 prefixes

All 3 prefixes, in address order.

147.72.252.0/22
192.88.209.0/24
192.88.210.0/24

IPv6 prefixes

All 1 prefix.

2620:8b:4000::/48

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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