AS18403(VN)

Nutrition Label

Routing footprint

AS18403 announces 8,023 distinct routed prefixes. The 25-prefix sample below links to per-prefix pages with full conflict and reverse-DNS detail.

• 1.52.0.0/23
• 1.52.2.0/23
• 1.52.4.0/24
• 1.52.5.0/24
• 1.52.6.0/24
• 1.52.7.0/24
• 1.52.0.0/20
• 1.52.8.0/23
• 1.52.10.0/24
• 1.52.11.0/24
• 1.52.12.0/24
• 1.52.13.0/24
• 1.52.14.0/24
• 1.52.15.0/24
• 1.52.16.0/24
• 1.52.17.0/24
• 1.52.18.0/24
• 1.52.19.0/24
• 1.52.20.0/24
• 1.52.21.0/24
• 1.52.22.0/24
• 1.52.23.0/24
• 1.52.16.0/20
• 1.52.24.0/24
• 1.52.25.0/24

Peering ecosystem

266 distinct peers via BGP. The first 200 (alphabetical) are listed below.

Blast radius

Count of dependent hostnames if AS18403 disappeared from the routing table.

≥352 hostnames depend on this network.Verified lower bound — counted across 50 of 8,059 announced prefixes. The true total is at least this many. Snapshot Fri, 12 Jun 2026 02:00:35 GMT.

MOAS / hijack watch

Prefixes routed by AS18403 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 AS18403 is unique to AS18403 in the current routing snapshot.

Threat posture

Related pages

Pivot deeper into the graph from AS18403.

• Country · VN
• Peer · AS12389AS12389
• Prefix · 1.52.0.0/23
• Live MOAS conflicts feed
• Threat feed · Spamhaus DROP
• Browse this ASN range · 18000-18999
• Glossary · What is BGP?
• Whisper Internet Directory — home

Cypher and MCP

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

MATCH (a:ASN {name: "AS18403"})-[: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.