AS3378 — MCI-ASN - Verizon Business(US)

Nutrition Label

Routing footprint

AS3378 announces 37 distinct routed prefixes. The 25-prefix sample below links to per-prefix pages with full conflict and reverse-DNS detail.

• 142.77.1.0/24
• 142.77.8.0/22
• 142.77.14.0/24
• 142.77.46.0/24
• 142.77.72.0/21
• 142.77.80.0/20
• 146.1.1.0/24
• 146.1.2.0/24
• 146.1.4.0/23
• 146.1.6.0/24
• 146.1.16.0/23
• 146.1.24.0/21
• 146.1.40.0/21
• 146.1.192.0/19
• 159.24.64.0/20
• 159.98.72.0/21
• 159.98.104.0/21
• 159.98.112.0/22
• 162.47.128.0/20
• 162.47.144.0/23
• 162.47.146.0/23
• 165.122.128.0/20
• 166.34.64.0/18
• 166.38.96.0/19
• 166.38.132.0/23

Peering ecosystem

4 distinct peers via BGP. The first 4 are listed below.

Blast radius

Count of dependent hostnames if AS3378 disappeared from the routing table.

13,293 hostnames depend on this network.Exact count across all 37 announced prefixes. Snapshot Tue, 04 Aug 2026 10:01:22 GMT.

MOAS / hijack watch

Prefixes routed by AS3378 that another Autonomous System also announces. A non-empty list is one of the strongest BGP-hijack signals available without active probes.

No active MOAS conflicts. Every prefix announced by AS3378 is unique to AS3378 in the current routing snapshot.

Threat posture

Related pages

Pivot deeper into the graph from AS3378.

• Country · US
• Peer · MCI-ASN - Verizon BusinessAS3371
• Prefix · 142.77.1.0/24
• Live MOAS conflicts feed
• Threat feed · Spamhaus DROP
• Browse this ASN range · 3000-3999
• Glossary · What is BGP?
• Whisper Internet Directory — home

Cypher and MCP

Reproduce the headline metric directly against graph.whisper.security:

MATCH (a:ASN {name: "AS3378"})-[:HAS_NAME]->(n:ASN_NAME)
OPTIONAL MATCH (a)-[:HAS_COUNTRY]->(c:COUNTRY)
RETURN a.name AS asn, n.name AS operator, c.name AS country

Or query Whisper from your own LLM workflow via the Whisper MCP server.