18.91.0.0/16 — Whisper Internet Directory

IPv4 prefix

18.91.0.0/16(US)

Last fetched Thu, 21 May 2026 06:27:56 GMT

18.91.0.0/16 is an IPv4 announced prefix originated by AS16509 (AMAZON-02 - Amazon.com, Inc.), allocated to US.

Nutrition Label

Announcing ASN

AS16509AMAZON-02 - Amazon.com, Inc.

MOAS conflicts

No active MOAS conflicts for 18.91.0.0/16. This prefix is announced by its registered originator only.

Sample IPs

No IPv4 addresses are currently observed inside 18.91.0.0/16. Possible dark prefix or unobserved address space.

Related pages

Pivot deeper into the graph from 18.91.0.0/16.

Cypher and MCP

Reproduce the prefix profile directly against graph.whisper.security:

MATCH (ap:ANNOUNCED_PREFIX {name: "18.91.0.0/16"})
OPTIONAL MATCH (ap)-[:ROUTES]->(asn:ASN)
OPTIONAL MATCH (asn)-[:HAS_NAME]->(n:ASN_NAME)
OPTIONAL MATCH (ap)-[:HAS_COUNTRY]->(c:COUNTRY)
RETURN ap.name AS cidr,
       asn.name AS asn,
       n.name AS network,
       c.name AS country

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