cyrusone.com

Summary

Registrar

GoDaddy.com, LLC

Status

clientDeleteProhibited

Created on

August 29, 2000

Expires on

August 29, 2027

Name servers

dns1.cyrusone.com, dns2.cyrusone.com, dns3.cyrusone.com, dns4.cyrusone.com

Mail servers

us-smtp-inbound-2.mimecast.com, us-smtp-inbound-1.mimecast.com

DMARC

Reject

SPF

Soft

DKIM

5 keys found

Website

See the website

Spoofing protection (DMARC)

DMARC tells mail servers what to do with an e-mail that claims to come from cyrusone.com but fails SPF and DKIM checks.

Policy

Reject

Subdomain policy

Reject

Messages covered

50%

DKIM alignment

Relaxed

SPF alignment

Relaxed

Aggregate reports

[email protected]

Failure reports

[email protected]

Record

v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; pct=50; fo=1;

Authorized senders (SPF)

SPF lists the servers allowed to send e-mails for cyrusone.com.

v=spf1 include:us._netblocks.mimecast.com include:spf.protection.outlook.com include:_spf.salesforce.com include:asp-spf1.yardi.com include:asp-spf2.yardi.com include:spf.us1.defend.egress.com ip4:216.117.89.100 ip4:216.117.89.101 ip4:192.254.125.211 ip4:216.244.113.55 ip4:208.185.229.0/24 ip4:208.185.235.0/24 ip4:148.59.108.0/23 ip4:148.59.106.0/23 ip4:103.28.42.0/24 ip4:146.88.28.0/24 ip4:203.55.21.0/24 ip4:204.75.142.0/24 ip4:167.89.106.151 a:b.spf.service-now.com a:c.spf.service-now.com a:d.spf.service-now.com include:servers.mcsv.net ip4:3.93.157.0/24 ip4:3.210.190.0/24 ip4:18.208.124.128/25 ip4:54.174.52.0/24 ip4:54.174.53.128/30 ip4:54.174.57.0/24 ip4:54.174.59.0/24 ip4:54.174.60.0/23 ip4:54.174.63.0/24 ip4:139.180.17.0/24 ip4:143.244.80.0/20 ip4:158.247.16.0/20 ~all

E-mail signing (DKIM)

DKIM keys published by cyrusone.com under the most common selectors. Other keys may exist under selectors specific to each sending service.

RSA keys shorter than 2048 bits, called short keys, are discouraged: they are easier to break.

MX, SPF, DKIM and DMARC: the e-mail records

Four DNS records make a domain's e-mail work. MX says where e-mails sent to cyrusone.com arrive; SPF, DKIM and DMARC let mail servers check that an e-mail claiming to come from cyrusone.com was really sent by this domain, which protects it against spoofing.

cyrusone.com  MX  10 mx1.cyrusone.com.
cyrusone.com  MX  20 mx2.cyrusone.com.

cyrusone.com  TXT  "v=spf1 mx include:_spf.google.com ip4:192.0.2.10 -all"

google._domainkey.cyrusone.com  TXT  "v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA…"

_dmarc.cyrusone.com  TXT  "v=DMARC1; p=quarantine; rua=mailto:[email protected]; adkim=r; aspf=r"

DNS records of cyrusone.com

Related IP addresses

IPv4 addresses used by cyrusone.com: website, name servers, mail servers and senders authorized by SPF.

WHOIS of the domain cyrusone.com

Domain Name: CYRUSONE.COM
   Registry Domain ID: 33704189_DOMAIN_COM-VRSN
   Registrar WHOIS Server: whois.godaddy.com
   Registrar URL: http://www.godaddy.com
   Updated Date: 2025-08-30T16:30:47Z
   Creation Date: 2000-08-29T15:54:18Z
   Registry Expiry Date: 2027-08-29T15:54:18Z
   Registrar: GoDaddy.com, LLC
   Registrar IANA ID: 146
   Registrar Abuse Contact Email: [email protected]
   Registrar Abuse Contact Phone: 480-624-2505
   Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
   Domain Status: clientRenewProhibited https://icann.org/epp#clientRenewProhibited
   Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
   Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited
   Name Server: DNS1.CYRUSONE.COM
   Name Server: DNS2.CYRUSONE.COM
   Name Server: DNS3.CYRUSONE.COM
   Name Server: DNS4.CYRUSONE.COM
   DNSSEC: unsigned
   URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2026-10-03T05:49:29Z <<<

For more information on Whois status codes, please visit https://icann.org/epp

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