AS3378Verizon Business
United StatesRegistryARINAs of 14th November 2026, AS3378 (Verizon Business), a network registered in the United States with ARIN, originates 40 IPv4 prefixes covering 81.9k addresses. By IPv4 address space that makes it the 2,780th-largest of the 80,840 networks we see originating IPv4, and the 896th-largest of 18,773 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. 98% of its routes reach at least 90% of full-feed peers.
At a glance
IPv4 prefixes
IPv6 prefixes
IPv4 addresses
IPv6 /64s
Upstream graph
The networks AS3378 is seen behind, one and two hops out, drawn from real AS paths.
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.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS701Verizon Business | US | Peer | 16,244 | 141 |
Prefixes
All 40The largest blocks AS3378 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 166.34.64.0/18 | 16.4k | 78/78 |
| 146.1.192.0/19 | 8.2k | 78/78 |
| 166.38.96.0/19 | 8.2k | 78/78 |
| 142.77.80.0/20 | 4.1k | 78/78 |
| 159.24.64.0/20 | 4.1k | 78/78 |
| 162.47.128.0/20 | 4.1k | 78/78 |
| 165.122.128.0/20 | 4.1k | 78/78 |
| 199.249.16.0/20 | 4.1k | 78/78 |
| 209.154.192.0/20 | 4.1k | 78/78 |
| 209.154.208.0/20 | 4.1k | 78/78 |
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%40
Propagation
- Globally propagated90% of full-feed peers or more97.5%39
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%2.5%1
Prefix sizes
Recent changes
Announcements that started or stopped since 15th Oct 2026.
- Announced209.154.192.0/205th Nov 2026
- Announced209.154.208.0/205th Nov 2026
- Announced142.77.8.0/2229th Oct 2026
- Withdrawn142.77.8.0/2215th Oct 2026
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.