Hostname
sub.fyi
Last fetched
sub.fyi resolves to 2 IPv4 addresses operated by CLOUDFLARENET - Cloudflare, Inc. in CA. WHOIS lists iana:1910 as the registrar.
Nutrition Label
Resolution chain
sub.fyi resolves to 2 distinct IPv4 addresses via WhisperGraph DNS data. Each row links to the IP, prefix, and announcing ASN.
| IP | Prefix | ASN | Operator | Country |
|---|---|---|---|---|
| 104.21.49.148 | 104.21.48.0/20 | AS13335 | CLOUDFLARENET - Cloudflare, Inc. | CA |
| 172.67.163.242 | 172.67.160.0/20 | AS13335 | CLOUDFLARENET - Cloudflare, Inc. | CA |
WHOIS identity
- Registrar
- iana:1910
- Organization
- subfyi
- Contact emails
- —
Subdomains
26 observed subdomains of sub.fyi.
Showing 24 of 26. View all subdomains →
Web-graph footprint
Distinct hostnames that link to or from sub.fyi in the public web crawl.
141 sites link to this hostname.
49 sites linked to from this hostname.
Sample inbound links
Threat posture
History
Mail and authentication
MX records
SPF policy
3 SPF mechanisms authorising senders for sub.fyi.
| Mechanism | Target |
|---|---|
| SPF_A | sub.fyi |
| SPF_A | web.sub.fyi |
| SPF_MX | sub.fyi |
Related pages
Pivot deeper into the graph from sub.fyi.
Cypher and MCP
Reproduce the resolution chain directly against graph.whisper.security:
MATCH (h:HOSTNAME {name: "sub.fyi"})-[: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 20Or query Whisper from your own LLM workflow via the Whisper MCP server.