AS396151 — STEWARDHEALTHCARE - Steward Health Care System LLC(US)

Nutrition Label

Routing footprint

AS396151 announces 18 distinct routed prefixes. The 18-prefix sample below links to per-prefix pages with full conflict and reverse-DNS detail.

• 198.89.64.0/24
• 198.89.65.0/24
• 198.89.66.0/24
• 198.89.67.0/24
• 198.89.68.0/24
• 198.89.69.0/24
• 198.89.70.0/24
• 198.89.71.0/24
• 198.89.72.0/24
• 198.89.73.0/24
• 198.89.74.0/24
• 198.89.75.0/24
• 198.89.77.0/24
• 198.89.78.0/24
• 198.89.79.0/24
• 198.89.83.0/24
• 198.212.151.0/24
• 204.58.2.0/23

Peering ecosystem

3 distinct peers via BGP. The first 3 are listed below.

Blast radius

Approximate count of dependent hostnames if AS396151 disappeared from the routing table.

~104 hostnames depend on this network.Sampled from 10 prefixes, snapshot Thu, 21 May 2026 11:00:08 GMT.

MOAS / hijack watch

Prefixes routed by AS396151 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 AS396151 is unique to AS396151 in the current routing snapshot.

Threat posture

Related pages

Pivot deeper into the graph from AS396151.

• Country · US
• Peer · COMCAST-7015 - Comcast Cable Communications, LLCAS7015
• Prefix · 198.89.64.0/24
• Live MOAS conflicts feed
• Threat feed · Spamhaus DROP
• Whisper Internet Directory — home

Cypher and MCP

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

MATCH (a:ASN {name: "AS396151"})-[: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.