Hostname
21cs.com
Last fetched
21cs.com resolves to 2 IPv4 addresses operated by MCPL-AS in US. WHOIS lists iana:73 as the registrar.
Nutrition Label
Resolution chain
21cs.com 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 |
|---|---|---|---|---|
| 199.60.103.149 | 199.60.103.0/24 | AS209242 | MCPL-AS | US |
| 199.60.103.49 | 199.60.103.0/24 | AS209242 | MCPL-AS | US |
WHOIS identity
- Registrar
- iana:73
- Organization
- dale ahle
- Contact emails
Subdomains
11 observed subdomains of 21cs.com.
Web-graph footprint
Distinct hostnames that link to or from 21cs.com in the public web crawl.
23 sites link to this hostname.
Sample inbound links
Threat posture
History
Mail and authentication
MX records
SPF policy
6 SPF mechanisms authorising senders for 21cs.com.
| Mechanism | Target |
|---|---|
| SPF_INCLUDE | 22678977.spf10.hubspotemail.net |
| SPF_INCLUDE | mail03-out.ultimatesoftware.com |
| SPF_INCLUDE | smtp.ultipro.com |
| SPF_INCLUDE | spf.protection.outlook.com |
| SPF_INCLUDE | spf1.21cs.com |
| SPF_IP | 164.90.172.12 |
Related pages
Pivot deeper into the graph from 21cs.com.
Cypher and MCP
Reproduce the resolution chain directly against graph.whisper.security:
MATCH (h:HOSTNAME {name: "21cs.com"})-[: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.