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AS394353USC/ISI - B-root

United StatesRegistryARIN

As of 23rd October 2026, AS394353 (USC/ISI - B-root), a network registered in the United States with ARIN, originates 7 IPv4 prefixes covering 2.3k addresses and 14 IPv6 prefixes. By IPv4 address space that makes it the 24,123rd-largest of the 79,652 networks we see originating IPv4, and the 6,045th-largest of 18,475 in the United States. It is seen behind 7 upstream networks, most often AS1299 (Arelion (fka. Telia Carrier)) and AS6939 (Hurricane Electric LLC). Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

7

IPv6 prefixes

14

IPv4 addresses

2.3k

IPv6 /64s

2.9M

Upstream graph

The networks AS394353 is seen behind, one and two hops out, drawn from real AS paths.

AS394353Toward the internet core
Upstream graph for AS394353: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS394353USC/ISI - B-rootThis networkAS226Los NettosAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS6939Hurricane Electri…AS264845LACNIC - Latin Am…AS567Los NettosAS13030Init7 (Switzerlan…AS16552Tiggee LLCAS49544i3D.net B.VAS215859Hetzner Cloud - S…AS18106Viewqwest Pte LtdAS20130Depaul University

Networks observed one and two hops upstream of AS394353 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

18

adjacent networks

Upstreams
739%
Peers
1161%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS394353
NetworkCountryRelationshipPathsVantage pts
AS1299Arelion (fka. Telia Carrier)SEPeer519103
AS6939Hurricane Electric LLCUSPeer33149
AS2914NTT America, Inc.USPeer25237
AS226Los NettosUSPeer9870
AS264845LACNIC - Latin American and Caribbean IP addressUYPeer8062
AS64112PIT CHILE SPCLPeer6561
AS20080Florida International UniversityUSPeer6464

Prefixes

The largest blocks AS394353 originates, widest first.

Largest prefixes originated by AS394353
PrefixAddressesVisibility
170.247.170.0/2351276/77
199.9.14.0/2351276/77
170.247.170.0/2425676/77
170.247.171.0/2425676/77
192.228.79.0/2425676/77
199.9.14.0/2425676/77
199.9.15.0/2425676/77
2001:500:200::/441M × /6463/64
2801:1b8:10::/441M × /6463/64
2001:500:84::/4865.5k × /6463/64

Routing health

How AS394353's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid100.0%21
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%21
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 7 prefixes

IPv6 — 14 prefixes

  • /441M × /6414.3%2
  • /4865.5k × /6485.7%12

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.