Hostname

by4.de

Last fetched Fri, 24 Jul 2026 08:55:19 GMT

by4.de resolves to 1 IPv4 address operated by AS24940 in DE.

Nutrition Label

Resolution chain

by4.de 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
78.46.8.105	78.46.0.0/15	AS24940	—	DE

WHOIS identity

No WHOIS records are currently associated with by4.de in WhisperGraph.

Subdomains

3 observed subdomains of by4.de.

Subdomain
mail.by4.de
www.by4.de
zucht.by4.de

Web-graph footprint

Distinct hostnames that link to or from by4.de in the public web crawl.

13 sites link to this hostname.

14 sites linked to from this hostname.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

mail.by4.de

SPF policy

2 SPF mechanisms authorising senders for by4.de.

Mechanism	Target
SPF_A	by4.de
SPF_MX	by4.de

Pivot deeper into the graph from by4.de.

Cypher and MCP

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

MATCH (h:HOSTNAME {name: "by4.de"})-[: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.