AS111 Boston University

BOSTONU-AS - Boston University · registered in the United States

IPv4 addresses133,37622 prefixes · 0.004% of announced IPv4

Rank in United States#460largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#1,471of 79,396 networks with IPv4

IPv616 x /32 (1,048,576 x /48)1 prefixes

CountryUnited States18,679 ASNs registered there

Open AS111 in ASN lookup Look up an IP in this network (128.197.0.1) All networks in United States

IPv4 prefixes

All 22 prefixes, in address order.

128.197.0.0/17
128.197.128.0/21
128.197.136.0/24
128.197.137.0/24
128.197.138.0/23
128.197.140.0/22
128.197.144.0/20
128.197.160.0/19
128.197.192.0/19
128.197.224.0/20
128.197.240.0/21
128.197.248.0/22
128.197.252.0/23
128.197.254.0/24
128.197.255.0/24
168.122.0.0/16
192.5.206.0/23
192.12.185.0/24
192.12.186.0/23
192.12.189.0/24
192.12.190.0/23
192.54.224.0/24

IPv6 prefixes

All 1 prefix.

2631:5000::/28

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AS89#462 DNIC-AS-00089 - Navy Network Information Center (NNIC)133,120

AS427#463 AFCONC-BLOCK1-AS - Air Force Systems Networking133,120

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