Hostname
backend.sk
Last fetched
backend.sk resolves to 2 IPv4 addresses operated by CLOUDFLARENET - Cloudflare, Inc. in CA.
Nutrition Label
Resolution chain
backend.sk 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 |
|---|---|---|---|---|
| 104.21.17.71 | 104.21.16.0/20 | AS13335 | CLOUDFLARENET - Cloudflare, Inc. | CA |
| 172.67.223.57 | 172.67.208.0/20 | AS13335 | CLOUDFLARENET - Cloudflare, Inc. | CA |
WHOIS identity
No WHOIS records are currently associated with backend.sk in WhisperGraph.
Subdomains
40 observed subdomains of backend.sk.
Showing 25 of 40. View all subdomains →
Web-graph footprint
Distinct hostnames that link to or from backend.sk in the public web crawl.
10 sites link to this hostname.
13 sites linked to from this hostname.
Sample inbound links
Threat posture
History
Mail and authentication
MX records
SPF policy
11 SPF mechanisms authorising senders for backend.sk.
| Mechanism | Target |
|---|---|
| SPF_A | backend.sk |
| SPF_INCLUDE | spf.sendinblue.com |
| SPF_IP | 213.136.75.50 |
| SPF_IP | 37.9.174.136 |
| SPF_IP | 37.9.174.137 |
| SPF_IP | 37.9.174.138 |
| SPF_IP | 5.189.167.153 |
| SPF_IP | 54.37.197.89 |
| SPF_IP | 54.37.197.90 |
| SPF_IP | 79.143.177.141 |
| SPF_MX | backend.sk |
Related pages
Pivot deeper into the graph from backend.sk.
Cypher and MCP
Reproduce the resolution chain directly against graph.whisper.security:
MATCH (h:HOSTNAME {name: "backend.sk"})-[: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.