Dataweaz

mastercard.com

Summary

Registrar
CSC Corporate Domains, Inc.
Status
clientTransferProhibited
Created on
July 27, 1994
Expires on
July 26, 2027
Name servers
a9-64.akam.net, a7-67.akam.net, a18-64.akam.net, a26-66.akam.net, a22-65.akam.net, a1-29.akam.net
Mail servers
mxb-00078002.gslb.pphosted.com, mxa-00078002.gslb.pphosted.com, mc.smtp.1.mastercard.com, mc.smtp.2.mastercard.com
DMARC
Reject
SPF
Soft

Spoofing protection (DMARC)

Reject

E-mails spoofing this domain are rejected.

DMARC tells mail servers what to do with an e-mail that claims to come from mastercard.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; fo=1; rua=mailto:[email protected]; ruf=mailto:[email protected]

Authorized senders (SPF)

Soft

E-mails sent by any other server are accepted but flagged as suspicious.

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

RuleValueResult
includespf.protection.outlook.comAllowed
includedeliverygateways.mastercard.comAllowed
includeexternal.mastercard.comAllowed
includeexternal2.mastercard.comAllowed
includedeliverygateways2.mastercard.comAllowed
all—Suspicious

Top-level DNS lookups: 5 of 10 allowed

Record

v=spf1 include:spf.protection.outlook.com include:deliverygateways.mastercard.com include:external.mastercard.com include:external2.mastercard.com include:deliverygateways2.mastercard.com ~all

E-mail signing (DKIM)

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

SelectorLikely serviceKeyStatus
k1MailchimpRSA 2048 bitsActive
k2MailchimpRSA 2048 bitsActive
s1SendGridRSA 2048 bitsActive
s2SendGridRSA 1024 bits · shortActive
mailjetMailjetRSA 1024 bits · shortActive
zendesk1ZendeskRSA 2048 bitsActive
zendesk2ZendeskRSA 2048 bitsActive

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

MX

An MX (Mail Exchanger) record designates a server that receives e-mails sent to the domain. When someone writes to an @mastercard.com address, their mail server queries the DNS for the domain's MX records, then delivers the message to the server they point to.

Example record

mastercard.com  MX  10 mx1.mastercard.com.
mastercard.com  MX  20 mx2.mastercard.com.

What the record contains

10, 20
Priority: the server with the lowest number is tried first. Servers with equal priority share the load.
mx1.mastercard.com.
Host name of the mail server. It must point to an A or AAAA record: an IP address or an alias (CNAME) is not allowed here.
0 .
An MX "0 .", called a null MX, declares that the domain accepts no e-mail: sending servers give up at once instead of retrying.

Declaring at least two servers with different priorities avoids losing e-mails during an outage: sending servers retry for several days and fall back on the backup server. Without any MX, they try to deliver directly to the IP address of the domain.

SPF

SPF (Sender Policy Framework) is a TXT record listing the servers allowed to send e-mails on behalf of the domain. The receiving server checks that the sender is on this list. The final "all" rule says what to do with other servers: reject them (-all), flag their e-mails as suspicious (~all) or make no decision (?all).

Example record

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

What the record contains

v=spf1
Identifies the record as an SPF policy. It must come first.
ip4, ip6
Allows a specific IP address or an address range, for example ip4:192.0.2.0/24.
a, mx
Allows the addresses of the domain itself (A record) or those of its mail servers (MX).
include
Allows the servers of another domain, usually a sending service: include:_spf.google.com for Google Workspace.
-all, ~all
Final rule, applied to every other server. Its qualifier decides what happens to them: - rejects them, ~ flags their e-mails as suspicious, ? makes no decision, + accepts them (avoid it).

A domain must publish only one SPF record, and its evaluation cannot exceed 10 DNS lookups (include, a, mx, exists, redirect). Beyond that, mail servers treat it as invalid.

DKIM

DKIM (DomainKeys Identified Mail) signs every outgoing e-mail with a private key. The matching public key is published in a TXT record at selector._domainkey.mastercard.com, so the recipient can check that the message really comes from the domain and was not altered on the way. The selector is chosen by each sending service and cannot be guessed: Dataweaz checks the most common ones (Google Workspace, Microsoft 365, Mailchimp, SendGrid…), so a key published under another selector may exist without appearing here.

Example record

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

What the record contains

v=DKIM1
Protocol version. Optional but recommended, in which case it must come first.
k
Key algorithm: rsa, the most common, or ed25519.
p
Public key, base64-encoded. An empty value means the key has been revoked.
t
Flags: y marks a key in testing, whose failures must not be penalized; s forbids its use for subdomains.

Each sending service publishes its key under its own selector (google, selector1, k1…), which allows several keys and seamless rotation. A 2048-bit RSA key is recommended today.

DMARC

DMARC (Domain-based Message Authentication, Reporting and Conformance) builds on SPF and DKIM. Published on _dmarc.mastercard.com, it tells mail servers what to do with an e-mail that fails these checks (let it through, send it to spam or reject it) and where to send reports.

Example record

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

What the record contains

v=DMARC1
Identifies the record as a DMARC policy. It must come first.
p
Policy applied to e-mails that fail the checks: none (monitoring only), quarantine (spam folder) or reject.
sp
Subdomain policy. Without it, subdomains follow the domain's policy.
rua
Address that receives daily aggregate reports about e-mails sent on behalf of the domain, whether they pass the checks or not.
ruf
Address that receives detailed failure reports, message by message. Few providers still send them.
pct
Percentage of e-mails subject to the policy, for a gradual rollout. 100 by default.
adkim, aspf
DKIM and SPF alignment: r (relaxed, a subdomain of the same domain is enough) or s (strict, the domain must be identical).

To roll out DMARC without blocking legitimate e-mails, start with p=none and an rua address, analyze the reports to find every service sending on behalf of the domain, then move to quarantine and finally to reject.

DNS records of mastercard.com

IP addresses (A and AAAA)

An A record maps the domain name to an IPv4 address: the address of the server that browsers contact to display the website. The AAAA record does the same for an IPv6 address. A domain can have several of them to spread visits across several servers.

TypeIP address
A216.119.218.99

Name servers (NS)

NS records designate the authoritative DNS servers of the domain: they answer every question about its other records (A, MX, TXT…). They are provided by the registrar, the hosting provider or a dedicated DNS service, and several servers are declared so that the domain keeps working if one of them fails.

ServerIP address
a9-64.akam.net184.85.248.64
a7-67.akam.net23.61.199.67
a18-64.akam.net95.101.36.64
a26-66.akam.net23.74.25.66
a22-65.akam.net23.211.61.65
a1-29.akam.net193.108.91.29

Mail servers (MX)

MX records point to the servers that receive e-mails sent to the domain, that is to @mastercard.com addresses. Each server has a priority: the one with the lowest number is tried first, the others take over if it fails. Without an MX record, the domain cannot receive e-mails.

PriorityServerIP address
10mxb-00078002.gslb.pphosted.com148.163.153.24
10mxa-00078002.gslb.pphosted.com148.163.149.25
20mc.smtp.1.mastercard.com148.163.153.24
20mc.smtp.2.mastercard.com148.163.149.25

TXT records

TXT records hold free text. They are used to prove ownership of the domain to online services (Google, Microsoft, Facebook…) and to publish e-mail security rules: SPF on the domain itself, DMARC on _dmarc.mastercard.com.

NameContent
mastercard.comslack-domain-verification=6Tn0MeeJ5y2rwxsCOuttdyaIpBz3r1HG1xKeMDpI
mastercard.commongodb-site-verification=t5k2LgdLxKWYVewBzPiEu0iTIGKtnlN2
mastercard.com8045-3EBB-B5FC-AEF3-14D1-AC67-1088-D900
mastercard.comatlassian-sending-domain-verification=ad83ad89-ec1d-40ee-b2f0-a352f055841f
mastercard.comgoogle-site-verification=lwih4Ax7Rsyv46SAAckGGGpcxPy9tpc4bYfVt4vstsY
mastercard.comopenai-domain-verification=dv-AgiAbBY6ez5xnvM7ql1I50Rm
mastercard.com_globalsign-domain-verification=eRi2ZQZJ99fAou8jrSC06eUJpasrvj8YgWl21vaW5G
mastercard.comonetrust-domain-verification=a14180ed5e7144f2ba6d02ece082fbd9
mastercard.comms-domain-verification=d733cf48-b051-4ead-b1a4-60ea82523113
mastercard.comairtable-verification=ac800a6f44c17925f6bd32ea4aa44894
mastercard.comapple-domain-verification=c6W1qeAHSo6DbwVc
mastercard.cominfoblox-domain-mastery=a79f9cd257e969fb72bb304523072b39bd50dfb6ea7d7f44d8dc7ec8e75a289904
mastercard.comjamf-site-verification=C60V1p8G2f3bel6UkdJ9jA
mastercard.comDynatrace-site-verification=1a474a54-75e8-40bb-8baf-a80cfdcedfe6__llctt109dvv9ba2hk0cp0sv8e2
mastercard.comonetrust-domain-verification=9faa54187b974ee6a08608d4858d8f7e
mastercard.comatlassian-domain-verification=CGO8tCXHtiZUBnTJh01TwMadn9aCwpHxamHZVPQBDTG3badn5kEl8/eju6244/QE
mastercard.comgoogle-site-verification=b1ZPa1IquEDz4Xb_3Nb0-UC4DsLRSanTmHZDGqBUiis
mastercard.comdocker-verification=4b72827b-32c1-4fe6-a443-2856c0df9a51
mastercard.comoE1olhbq9xyXp2ohGw2F
mastercard.comatlassian-domain-verification=zXeHVyO9eWog3f6TQIfeFwk1hRniWa0Gylu2ONeHNtbc05S48qY9ad9WEcpSurru
mastercard.comfacebook-domain-verification=u4nbx98zpaot2nhzhfju6z24xs6miv
mastercard.com56e6a93212e4482d99c84a639d254b67
mastercard.commongodb-site-verification=rZkQa6gUUHH4Mx4SosnfnglyvIp3rmYv
mastercard.compostman-domain-verification=223f70ad07799f852fceadeac539231b4f3b9f6673f46886dee85558cedf4efaa1ec40c0bb258bdf3caf18b9c8c868d1a6779d89bfe6b7466480c385f508ada3
mastercard.commongodb-site-verification=axmDkHlwAGvNsA17D8dPlsIOYgcqtrBz
mastercard.comgoogle-site-verification=aFpgfHwpIB9wP8vy7ha7XlE_Ie5eniXNrVgTZvb0Y6s
mastercard.commixpanel-domain-verify=32a3f24d-1ab8-499e-be20-4d90a50e4d0e
mastercard.com3a30be93eb45566a90f4e95ee72a089a
mastercard.comv=spf1 include:spf.protection.outlook.com include:deliverygateways.mastercard.com include:external.mastercard.com include:external2.mastercard.com include:deliverygateways2.mastercard.com ~all
mastercard.com00DA0000000K9eN=1TBUH00000000Mb
mastercard.comDynatrace-site-verification=5f211e2e-80de-4ed7-9853-54223730fd02__b3bscjmsb302fkh5cvlapjot3b
mastercard.combettercomp-verify=04feae4303388a2be1b27b3e55c2a594e1840997c78fe3b4e6b45efdfc84b9ea
mastercard.comgoogle-gws-recovery-domain-verification=60378709
mastercard.compostman-domain-verification=33b37ff3a7f216afc8364e6163ec691362aa75dcc1bf51f9711b54f86df9b1a91b0aa76f1993910c5c63228a86ce245429bd8539ade185fab07ddb380ef6bcf3
mastercard.combw=4RHf8CdIg7RhxDQ1qZTUqTzyT+brk70yfwKP9yZ99jB6
mastercard.comOPddTNoGXuP0t54rWgyL2LZjeyJYVhiX1O6Y5m5MTuOOhv4/1X+1ZwYUex9hKi8FmtIKfUPtvY04tYLhiOTV7w==
mastercard.comZOOM_verify_5iqN50tCRjWyMgQa3G__uQ
mastercard.comadobe-idp-site-verification=9a8affe9f40574b4522d548efd4c0838df83704137a4c4c09b28103e42723a62
mastercard.comLXqzgspP+p6jZLtCY31SpgFiwCeGy0jFUtv9ju0S65d/MDpaaSokywn2o7CPf0935/d8auKgbI3wn1UEkvtzzA==
mastercard.comsmartsheet-site-validation=hqDNvixcpGGmDqgXw0IQAQzYiCUZ_NjY
mastercard.comgoogle-site-verification=66zwLd8X_8K0nX8NNWXS_zlgqFq1pTfHid8vJzb3lB8
mastercard.compardot163061=06ad0741f9d54ea5405da3cfa43f33b64e150ef5c57da443ad300ba004da645b
mastercard.comfe9fc289c3ff0af142b6d3bead98a923
mastercard.comec7f346604f518906d35ef0492709f78
mastercard.comsmartsheet-site-validation=rgDcv0UCdWvo-ZFj5FTmmB7ZBXyPgh2E
_dmarc.mastercard.comv=DMARC1; p=reject; fo=1; rua=mailto:[email protected]; ruf=mailto:[email protected]
k1._domainkey.mastercard.comv=DKIM1;t=s;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1esJ8SCWI11W6ztaCcfSzFfUc4VC/DppR7j8cpsclMaUA5ZDHTjoTp/eZJ6QwjX0LIl9TSKCjfY79W2HsK0TgtTvfCl68W4ykVcVi2+wc83Xl2k5VLonTmSLHnh/5M2+t+D7CGCVq4U9xk5RveRWxfPb90BlpXxP3hCLnZ2L2ddDDYZWwAdyb3u6MNpnc8S8ohc5c+IgSEO19sfyJ47L6a7sPVEYPSAlsh2mTW3Mgwtn8z1lCoN3+xrOz9SScKVECli89KR1biKJUL4WfoL9XO0REwpUvxbh8udB/96IVUJmWzIRcHIp/CprzqFzg84UfkQ576AkyL0TEOaev1OJcwIDAQAB
k2._domainkey.mastercard.comv=DKIM1;t=s;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsFmKaczNxV3GpyF30uJruv4/DVAxyBkad2rAnfhZZO0AqyRmLtGPWrcsXtjfTZx3y6U8sC/84yHdS+uicyekUy6HGxfdmlDwRdrk8OyA60TXd6mIcrlh4oq9w/y/8Nr3DoVweJq3PxyH7dYpVbyl5/NkjlPjOGzK12eSq/TUdChSIrCHIDbN0kCWyyo0RJbKI1FbZSQEg5S8ifbF5fFIPTYbviQLo/jHy3NitYHaNKX7zROSLSDqhtex00upEwQq5ptph+BaZH3MC73zguaEsmOZPOIcCTYXiS2l4tkbXMGqGboyfhj2Fy8heZlmNJUizrU/vVhyrvy5JJb/I0dI/wIDAQAB
s1._domainkey.mastercard.comk=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuzxZidye+Mkoiv/Bd18lL/tEtXHqEfTt/gwWSpaxXPOs3pb0kpcOld4cBNB/KbrKKiuDg2erAzVCqEj4Ex4Dh1DyNEOXJT265BeTBpVxCP3YNlixiGXHRvOF12zazBehoNWGEqhei82FTRepApVud3fp+NdKC89oMdndlaV1Tceg4phDnyrM5L3hZWFRoQ2W0yxHWtbZyNGYRjsSaUwgv2TkNyQ0T3kFTfgZrrjPcJ49tk3ruowm+/m6I9P721/DhWgYi+UCDu5zC4pnr+ZiLnSgxWJpzsO2dew+Nse5wJXszGpSuga6y/4kn0PKYpjHWIeBzg3lpvCN2KrOGXjNgwIDAQAB
s2._domainkey.mastercard.comk=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCwKjsz/wex5o0Zb7xnipXlzool0XNwQTlkaHJt0yfVbeCbdkt57i1gBYstId34WEQbGzNvTkLueblAORhJbAaMJkGbpi0JQQbUKL4ANI+46DssmbUDgQXTKBqvhr+jHGY5tqy0o1Kmhbg90foVT98WS5qL5U7EhH6KyzdctMhY3wIDAQAB
mailjet._domainkey.mastercard.comv=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC8t+bIQtGf4KIrSRk/8cDkfm8Cr0yWYvYF0krgYJ+VzBSHd4fHLL+lp3xp0YLKsd8ITir3OymjvR2blttRCgXO2em9+a75rftm4ZpM25Bvao27UExl02QHwwwjIqhy08A/DXiEcpy4P+er/HITDi7RzE1GFIAmrRapN6QvzKlHrwIDAQAB
zendesk1._domainkey.mastercard.comv=DKIM1;t=s;n=core;k=rsa;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA9IqdLrO3Zr2/56MHt8oQVCQorP0Bl2Fz9sM2tFBnJCdB/HogQmuudEg2xAovCN2PYpw44UijIvPuBoT9vxiv6ZCBJTLJXa82r6ke5rE4tbe9NKFIrVIb9S306cJDrnKFMDb8p0dU/Su0+eUR5gVAOtCuz2L8HAzs5edvsEvD/Fb4ny1RLNSEPZkIQLfGhVxQeWANm3+1Jwb/OBVXV9k0nKpWrpgqcmO7NzroJirp014RQY7rGi60JLUubc6XhvoFQBQrtOAdVlZC5wvfS1bgpq5kQpdP7cajIqWCeqxPTeo0ZUpey2ZcaygEsZz0Z3Gs5wDzyuqd7/ADpr2jNF7ozwIDAQAB
zendesk2._domainkey.mastercard.comv=DKIM1; t=s; n=core; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAmiSFNkgXrO3I8aOaPONDZWHv027rkiGIwb838OyXPgvFDEkCV/qGcdXSjZnaVAadrTm/oKnL8WOltP9zB1FLEuKt0fTi5zRyKPE4oIYCnEzXwrGqzjUcCABQBawQVqvXjDOaYh9Lhp8W5PYOLo905vRW7ipyIMDhuzBOJls91/WWXnNK0OwP3RghiisZjA3K2KqtRwf7w6GjNeNuAMNhvcmgAN15d/mhK+dev/hcRbal66RoYyTD8c0F0isahWH0envEX8aj+SBhheNk0/U37dGE+4nFaY5yP9CUlYjFKDSIKZgHzG4Hci3t/RubU58pi6BCrQQdAFvIOeDFeCZ0ywIDAQAB

Related IP addresses

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

IP addressUsed for/24 block
216.119.218.99Website216.119.218.0/24
184.85.248.64Name server a9-64.akam.net184.85.248.0/24
23.61.199.67Name server a7-67.akam.net23.61.199.0/24
95.101.36.64Name server a18-64.akam.net95.101.36.0/24
23.74.25.66Name server a26-66.akam.net23.74.25.0/24
23.211.61.65Name server a22-65.akam.net23.211.61.0/24
193.108.91.29Name server a1-29.akam.net193.108.91.0/24
148.163.153.24Mail server mxb-00078002.gslb.pphosted.com, Mail server mc.smtp.1.mastercard.com148.163.153.0/24
148.163.149.25Mail server mxa-00078002.gslb.pphosted.com, Mail server mc.smtp.2.mastercard.com148.163.149.0/24

WHOIS of the domain mastercard.com

Domain Name: MASTERCARD.COM
   Registry Domain ID: 1936611_DOMAIN_COM-VRSN
   Registrar WHOIS Server: whois.corporatedomains.com
   Registrar URL: http://cscdbs.com
   Updated Date: 2026-07-22T05:10:37Z
   Creation Date: 1994-07-27T04:00:00Z
   Registry Expiry Date: 2027-07-26T04:00:00Z
   Registrar: CSC Corporate Domains, Inc.
   Registrar IANA ID: 299
   Registrar Abuse Contact Email: [email protected]
   Registrar Abuse Contact Phone: 8887802723
   Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
   Domain Status: serverDeleteProhibited https://icann.org/epp#serverDeleteProhibited
   Domain Status: serverTransferProhibited https://icann.org/epp#serverTransferProhibited
   Domain Status: serverUpdateProhibited https://icann.org/epp#serverUpdateProhibited
   Name Server: A1-29.AKAM.NET
   Name Server: A18-64.AKAM.NET
   Name Server: A22-65.AKAM.NET
   Name Server: A26-66.AKAM.NET
   Name Server: A7-67.AKAM.NET
   Name Server: A9-64.AKAM.NET
   DNSSEC: unsigned
   URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2026-10-02T10:58:28Z <<<

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
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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.

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