sinch.com

Summary

Registrar

Key-Systems GmbH

Status

clientTransferProhibited

Created on

December 3, 1997

Expires on

December 2, 2026

Name servers

ns-417.awsdns-52.com, ns-677.awsdns-20.net, ns-1252.awsdns-28.org, ns-1759.awsdns-27.co.uk

Mail servers

sinch-com.mail.protection.outlook.com

DMARC

Reject

SPF

Soft

DKIM

8 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 sinch.com but fails SPF and DKIM checks.

Policy

Reject

Subdomain policy

Reject

Messages covered

100%

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];

Authorized senders (SPF)

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

v=spf1 ip4:52.51.255.123 ip4:52.169.106.207 ip4:213.242.88.0/24 ip4:200.143.186.160/28 ip4:194.218.202.240/28 ip4:193.151.46.0/23 ip4:189.125.75.128/28 ip4:168.245.19.11 ip4:185.32.76.5 ip4:185.250.238.229 ip4:205.218.33.30 ip4:199.255.192.0/22 ip4:199.127.232.0/22 ip4:54.240.0.0/18 ip4:69.169.224.0/20 ip4:23.249.208.0/20 ip4:23.251.224.0/19 ip4:76.223.176.0/20 ip4:54.240.64.0/19 ip4:54.240.96.0/19 ip4:52.82.172.0/22 ip4:141.193.32.19 ip4:72.35.23.0/24 ip4:72.35.12.0/24 ip4:192.162.216.0/22 ip4:208.70.128.0/21 ip4:185.38.180.0/22 ip4:89.104.206.0/23 ip4:3.211.161.173 ip4:52.21.142.91 ip4:34.227.209.168 ip6:2a01:77c0:1180::/46 ip6:2a01:77c0:1619::/48 ip6:2a01:77c0:7135::/48 ip6:2a01:77c0:6::/47 ip6:2001:978:2a01:0:6:0:1089:1091/128 ip6:2001:978:2a01:0:6:0:1089:1092/128 include:spf.protection.outlook.com include:_spf.mailgun.org include:_spf.eu.mailgun.org include:mailanyone.net include:et._spf.pardot.com include:_spf.cmail.ondemand.com ~all

E-mail signing (DKIM)

DKIM keys published by sinch.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 sinch.com arrive; SPF, DKIM and DMARC let mail servers check that an e-mail claiming to come from sinch.com was really sent by this domain, which protects it against spoofing.

sinch.com  MX  10 mx1.sinch.com.
sinch.com  MX  20 mx2.sinch.com.

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

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

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

DNS records of sinch.com

Related IP addresses

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

WHOIS of the domain sinch.com

Domain Name: SINCH.COM
   Registry Domain ID: 774653_DOMAIN_COM-VRSN
   Registrar WHOIS Server: whois.rrpproxy.net
   Registrar URL: http://www.key-systems.net
   Updated Date: 2025-12-03T08:01:57Z
   Creation Date: 1997-12-03T05:00:00Z
   Registry Expiry Date: 2026-12-02T05:00:00Z
   Registrar: Key-Systems GmbH
   Registrar IANA ID: 269
   Registrar Abuse Contact Email: [email protected]
   Registrar Abuse Contact Phone: +49.68949396850
   Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
   Name Server: NS-1252.AWSDNS-28.ORG
   Name Server: NS-1759.AWSDNS-27.CO.UK
   Name Server: NS-417.AWSDNS-52.COM
   Name Server: NS-677.AWSDNS-20.NET
   DNSSEC: unsigned
   URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2026-10-02T11:53:43Z <<<

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

NOTICE: The expiration date displayed in this record is the date the
registrar's sponsorship of the domain name registration in the registry is
currently set to expire. This date does not necessarily reflect the expiration
date of the domain name registrant's agreement with the sponsoring
registrar.  Users may consult the sponsoring registrar's Whois database to
view the registrar's reported date of expiration for this registration.

TERMS OF USE: You are not authorized to access or query our Whois
database through the use of electronic processes that are high-volume and
automated except as reasonably necessary to register domain names or
modify existing registrations; the Data in VeriSign Global Registry
Services' ("VeriSign") Whois database is provided by VeriSign for
information purposes only, and to assist persons in obtaining information
about or related to a domain name registration record. VeriSign does not
guarantee its accuracy. By submitting a Whois query, you agree to abide
by the following terms of use: You agree that you may use this Data only
for lawful purposes and that under no circumstances will you use this Data
to: (1) allow, enable, or otherwise support the transmission of mass
unsolicited, commercial advertising or solicitations via e-mail, telephone,
or facsimile; or (2) enable high volume, automated, electronic processes
that apply to VeriSign (or its computer systems). The compilation,
repackaging, dissemination or other use of this Data is expressly
prohibited without the prior written consent of VeriSign. You agree not to
use electronic processes that are automated and high-volume to access or
query the Whois database except as reasonably necessary to register
domain names or modify existing registrations. VeriSign reserves the right
to restrict your access to the Whois database in its sole discretion to ensure
operational stability.  VeriSign may restrict or terminate your access to the
Whois database for failure to abide by these terms of use. VeriSign
reserves the right to modify these terms at any time.

The Registry database contains ONLY .COM, .NET, .EDU domains and
Registrars.