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Hostname

calendar.com

Last fetched

calendar.com resolves to 3 IPv4 addresses operated by CLOUDFLARENET - Cloudflare, Inc. in CA. WHOIS lists iana:9 as the registrar.

Nutrition Label

WHISPER CANON · calendar.comRouting diversity2.4/10Peering density10.0/10MOAS conflict✓ noneThreat-feed listings6.8/10WHOIS transparency10.0/10Resolver footprint8.2/10canon.whisper.security/host/calendar.com

Resolution chain

calendar.com resolves to 3 distinct IPv4 addresses via WhisperGraph DNS data. Each row links to the IP, prefix, and announcing ASN.

IPPrefixASNOperatorCountry
104.26.4.183104.26.0.0/20AS13335CLOUDFLARENET - Cloudflare, Inc.CA
104.26.5.183104.26.0.0/20AS13335CLOUDFLARENET - Cloudflare, Inc.CA
172.67.75.35172.67.64.0/20AS13335CLOUDFLARENET - Cloudflare, Inc.CA

WHOIS identity

Registrar
iana:9
Organization
attn domain inquiries
Contact emails

Subdomains

16 observed subdomains of calendar.com.

Subdomain
api.calendar.com
www.calendar.com
support.calendar.com
stage.calendar.com
scheduling.calendar.com
ptr7339.calendar.com
ptr176.calendar.com
dev.calendar.com
conferences.calendar.com
concerts.calendar.com
assets.calendar.com
appstage.calendar.com
appdev.calendar.com
app.calendar.com
apistage.calendar.com
apidev.calendar.com

Web-graph footprint

Distinct hostnames that link to or from calendar.com in the public web crawl.

1,651 sites link to this hostname.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

SPF policy

5 SPF mechanisms authorising senders for calendar.com.

MechanismTarget
SPF_INCLUDE_spf.google.com
SPF_INCLUDE_u.calendar.com._spf.dmarclg.com
SPF_INCLUDEsendgrid.net
SPF_INCLUDEspf.sendinblue.com
SPF_MXcalendar.com

Related pages

Pivot deeper into the graph from calendar.com.

Cypher and MCP

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

MATCH (h:HOSTNAME {name: "calendar.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 20

Or query Whisper from your own LLM workflow via the Whisper MCP server.