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AS3378Verizon Business

United StatesRegistryARIN

As of 29th September 2026, AS3378 (Verizon Business), a network registered in the United States with ARIN, originates 38 IPv4 prefixes covering 73.7k addresses. By IPv4 address space that makes it the 2,954th-largest of the 79,607 networks we see originating IPv4, and the 946th-largest of 18,442 in the United States. It is seen behind 1 upstream network, most often AS701 (Verizon Business), and in front of 3 downstream networks. None of its announcements have a valid RPKI ROA. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

38

IPv6 prefixes

0

IPv4 addresses

73.7k

IPv6 /64s

0

Upstream graph

The networks AS3378 is seen behind, one and two hops out, drawn from real AS paths.

AS3378Toward the internet core
Upstream graph for AS3378: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS3378Verizon BusinessThis networkAS701Verizon BusinessAS1299Arelion (fka. Tel…AS3356Lumen (Level 3)

Networks observed one and two hops upstream of AS3378 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

8

adjacent networks

Upstreams
113%
Peers
450%
Downstreams
338%

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

Upstreams of AS3378
NetworkCountryRelationshipPathsVantage pts
AS701Verizon BusinessUSPeer16,895147

Prefixes

All 38

The largest blocks AS3378 originates, widest first.

Largest prefixes originated by AS3378
PrefixAddressesVisibility
166.34.64.0/1816.4k82/82
146.1.192.0/198.2k82/82
166.38.96.0/198.2k82/82
142.77.80.0/204.1k82/82
159.24.64.0/204.1k82/82
162.47.128.0/204.1k82/82
165.122.128.0/204.1k82/82
199.249.16.0/204.1k82/82
142.77.72.0/212k82/82
146.1.24.0/212k82/82

Routing health

How AS3378'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

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%38

Propagation

  • Globally propagated90% of full-feed peers or more100.0%38
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 38 prefixes

Recent changes

Announcements that started or stopped since 30th Aug 2026.

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