AS394353 B.Root-Server-OPS

BROOT-AS - B.Root-Server-OPS · registered in the United States

IPv4 addresses1,2803 prefixes · <0.001% of announced IPv4

Rank in United States#7,318largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#28,066of 79,396 networks with IPv4

IPv632 x /4812 prefixes

CountryUnited States18,679 ASNs registered there

Open AS394353 in ASN lookup Look up an IP in this network (170.247.170.1) All networks in United States

IPv4 prefixes

All 3 prefixes, in address order.

170.247.170.0/23
192.228.79.0/24
199.9.14.0/23

IPv6 prefixes

All 12 prefixes.

2001:500:84::/48
2001:500:200::/47
2001:500:203::/48
2001:500:204::/46
2001:500:208::/47
2001:500:20a::/48
2001:500:20b::/48
2001:500:20c::/46
2801:1b8:10::/47
2801:1b8:12::/47
2801:1b8:14::/46
2801:1b8:18::/45

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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