sigma4.com.br

Nutrition Label

Resolution chain

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WHOIS identity

Registrar

—

Organization

jas informatica ltda

Contact emails

• camila.teixeira@sigma4.com.br

Subdomains

34 observed subdomains of sigma4.com.br.

Web-graph footprint

Distinct hostnames that link to or from sigma4.com.br in the public web crawl.

9 sites linked to from this hostname.

Threat posture

History

Mail and authentication

Related pages

Pivot deeper into the graph from sigma4.com.br.

• Email · camila.teixeira@sigma4.com.br
• Apex domain · com.br
• TLD · .br
• Browse hostnames · si…
• Glossary · What is a hostname?
• Whisper Internet Directory — home
• Live MOAS conflicts feed
• Threat feed · Spamhaus DROP

Cypher and MCP

Reproduce the resolution chain directly against graph.whisper.security:

MATCH (h:HOSTNAME {name: "sigma4.com.br"})-[:RESOLVES_TO]->(ip:IPV4)
      -[:ANNOUNCED_BY]->(ap:ANNOUNCED_PREFIX)
      -[:ROUTES]->(asn:ASN)-[:HAS_NAME]->(n:ASN_NAME)
RETURN ip.name AS ip, ap.name AS prefix, asn.name AS asn, n.name AS operator
LIMIT 20

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