Hostname

cerfer.co

Last fetched Wed, 27 May 2026 02:05:44 GMT

cerfer.co resolves to 1 IPv4 address operated by AS8520 in DE.

Nutrition Label

Resolution chain

cerfer.co resolves to 1 distinct IPv4 address via WhisperGraph DNS data. Each row links to the IP, prefix, and announcing ASN.

IP	Prefix	ASN	Operator	Country
88.215.207.61	88.215.192.0/19	AS8520	—	DE

WHOIS identity

No WHOIS records are currently associated with cerfer.co in WhisperGraph.

Subdomains

2 observed subdomains of cerfer.co.

Subdomain
autodiscover.cerfer.co
www.cerfer.co

Web-graph footprint

Distinct hostnames that link to or from cerfer.co in the public web crawl.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

relay.mail.sec-provider.de

SPF policy

2 SPF mechanisms authorising senders for cerfer.co.

Mechanism	Target
SPF_A	mailbox.dena.de
SPF_INCLUDE	spf.sec-provider.de

Pivot deeper into the graph from cerfer.co.

Cypher and MCP

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

MATCH (h:HOSTNAME {name: "cerfer.co"})-[: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.