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AS3372Verizon Business

United StatesRegistryARIN

As of 29th September 2026, AS3372 (Verizon Business), a network registered in the United States with ARIN, originates 105 IPv4 prefixes covering 477k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 741st-largest of the 79,607 networks we see originating IPv4, and the 181st-largest of 18,442 in the United States. It is seen behind 1 upstream network, most often AS3378 (Verizon Business), and in front of 3 downstream networks. 3% of its announcements have 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

105

IPv6 prefixes

1

IPv4 addresses

477k

IPv6 /64s

4.3B

Upstream graph

The networks AS3372 is seen behind, one and two hops out, drawn from real AS paths.

AS3372Toward the internet core
Upstream graph for AS3372: 2 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS3372Verizon BusinessThis networkAS3378Verizon BusinessAS701Verizon Business

Networks observed one and two hops upstream of AS3372 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 AS3372
NetworkCountryRelationshipPathsVantage pts
AS3378Verizon BusinessUSPeer9,497147

Prefixes

All 106

The largest blocks AS3372 originates, widest first.

Largest prefixes originated by AS3372
PrefixAddressesVisibility
165.122.0.0/1665.5k82/82
166.34.128.0/1732.8k81/82
166.35.128.0/1732.8k81/82
108.11.64.0/1816.4k81/82
166.37.0.0/1816.4k81/82
151.205.32.0/198.2k82/82
166.32.128.0/198.2k81/82
166.33.0.0/198.2k82/82
166.33.64.0/198.2k81/82
166.33.96.0/198.2k81/82

Routing health

How AS3372'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

  • Valid2.8%3
  • Invalid0.0%0
  • No ROA97.2%103

Propagation

  • Globally propagated90% of full-feed peers or more100.0%106
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 105 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 30th Aug 2026.

No announcement by AS3372 started or stopped in this period.

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