Dataweaz

mckesson.com

Summary

Registrar
CSC Corporate Domains, Inc.
Status
clientTransferProhibited
Created on
November 9, 1994
Expires on
November 8, 2027
Name servers
ep2ns01.mckesson.com, ep1ns01.mckesson.com, ep2ns03.mckesson.org, ep1ns02.mckesson.net, ep2ns02.mckesson.net, ep1ns03.mckesson.org, ep1ns04.mckesson.com
Mail servers
mx0b-0016dd01.pphosted.com, mx0a-0016dd01.pphosted.com
DMARC
Reject

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 mckesson.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; adkim=r; aspf=r; fo=1; pct=100; rf=afrf; ri=86400; rua=mailto:[email protected]; ruf=mailto:[email protected]

Authorized senders (SPF)

Strict

E-mails sent by any other server are rejected.

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

RuleValueResult
include_spf.salesforce.comAllowed
includeservers.mcsv.netAllowed
include_spf1.mckesson.comAllowed
include_spf2.mckesson.comAllowed
includespf.bananatag.comAllowed
all—Rejected

Top-level DNS lookups: 5 of 10 allowed

Record

v=spf1 include:_spf.salesforce.com include:servers.mcsv.net include:_spf1.mckesson.com include:_spf2.mckesson.com include:spf.bananatag.com -all

E-mail signing (DKIM)

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

SelectorLikely serviceKeyStatus
selector1Microsoft 365RSA 1024 bits · shortActive
k1MailchimpRSA 1024 bits · shortActive
k2MailchimpRSA 2048 bitsActive
k3MailchimpRSA 2048 bitsActive
s1SendGridRSA 2048 bitsActive
s2SendGridRSA 1024 bits · shortActive

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 mckesson.com arrive; SPF, DKIM and DMARC let mail servers check that an e-mail claiming to come from mckesson.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 @mckesson.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

mckesson.com  MX  10 mx1.mckesson.com.
mckesson.com  MX  20 mx2.mckesson.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.mckesson.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

mckesson.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.mckesson.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.mckesson.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.mckesson.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.mckesson.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 mckesson.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
A45.60.171.26
A45.60.151.26

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
ep2ns01.mckesson.com208.94.148.13
ep1ns01.mckesson.com198.51.44.5
ep2ns03.mckesson.org208.80.126.13
ep1ns02.mckesson.net198.51.45.5
ep2ns02.mckesson.net208.80.124.13
ep1ns03.mckesson.org198.51.44.69
ep1ns04.mckesson.com198.51.45.69

Mail servers (MX)

MX records point to the servers that receive e-mails sent to the domain, that is to @mckesson.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
10mx0b-0016dd01.pphosted.com148.163.143.65
10mx0a-0016dd01.pphosted.com148.163.147.116

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.mckesson.com.

NameContent
mckesson.comapple-domain-verification=xw8Nd6kWVZsH2Mz4
mckesson.comadobe-idp-site-verification=f9b8b7c82fa3791b4bc6c71e0544f373157e52bc54009954c0a1b8281cadc25e
mckesson.comgoogle-site-verification=5FaUtcPVuazwyvShOAb0Z3wn0K2WBph0-uBql-Kh-ao
mckesson.commiro-verification=88fbc5bc244b32dbb566b32a427f088e92b3008e
mckesson.compendo-domain-verification=fd2b7d0c-3500-4da0-8d1f-606bf1f05640
mckesson.commongodb-site-verification=Or8i9c3sInlimltZHnIPxeWNEgqG4SwH
mckesson.comdocker-verification=78b5c64d-c8ec-4cf8-916d-5576ee0faabd
mckesson.comtwilio-domain-verification=74f332ffb8602dd9683b7ef4de2be500
mckesson.comnintex.5ea04b3fd574e20c59dea539
mckesson.comcisco-ci-domain-verification=665a73194c299312bded120c161049b2f47ed34652a17d23d27d11c43aa9f7ce
mckesson.comasv=439e2cba8a9fd332ae77e8de374e060a
mckesson.comasv=a9d056b489aa53641772d188ce2d0ea7
mckesson.comcisco-ci-domain-verification=5152fc70273fee7d968cb7f4e8396bcea724fff97cec1b4f538c34a554dae9e7
mckesson.comcisco-ci-domain-verification=58302a6dcaafff34a3049815bba79ccee99665571f25d798475cfad3405a3815
mckesson.comcisco-ci-domain-verification=4047c8f4abcaa331960c9f99522b0f4ac0b9e4f886c52511b66077b0eed90816
mckesson.comcisco-ci-domain-verification=58bbfbf82dca3cf43c4c6b3b626ce29cabd5be24a74ed68f3f11955844053220
mckesson.comlaunchdarkly-domain-verification=75ab1d3d-79f5-4b37-b206-cc9bb2058cb4
mckesson.comh1-domain-verification=oQuAKih8KSNNzM8Stf59Nh7sJmK5cKmWJyd5CQ8W549X7fs9
mckesson.comcisco-ci-domain-verification=7dc4bfb7c629b4c8830cdaef4593ce638e9c87200d61eff92e4208b96c500e16
mckesson.comzscaler-verification=zscaler-verification-7234647-5072025-Pk25zZ
mckesson.comWinB7gpG31Ap_C37pIwWZFLLfCNLojG2aGO8MjlL1t4
mckesson.comjamf-site-verification=3zm7A9R8hXaFsaL9-qHgwA
mckesson.comairtable-verification=04ea8df8518c501d977e4ec8823675aa
mckesson.comIeMmEcdiP2BRSasA_34j89NPq_Q
mckesson.commongodb-site-verification=fpqljkwnCK5OTzc6deXKQHLIT6EQ4cvO
mckesson.combettercomp-verify=16011dfcdb9e7e6e129525f5a74c83758a3fbf42a47e7853114d87e800243681
mckesson.combettercomp-verify=5eb7ca5c615210274699feef8276f76eb3d6a14733d0dd3184c8f39082f1ca47
mckesson.comcisco-ci-domain-verification=33826b13d8c396538025e2fa0c7341478555c5f114385334d015f03fd66ff480
mckesson.comidentrust_validate=WfVIBJOCHZKrEyy5/Tkt4178Mn6uH/VzG1dpnUZ+PICg
mckesson.comanthropic-domain-verification-cqfhh3=t3jqPw1WWFUewhTYm4uBAZLcr
mckesson.compostman-domain-verification=07cb4d07cece653f32dbe59d021baae28f5ed55e6406282bec193b16ce7bce6db71a0db6903c90dbca8cb6dd8cdf207c5d2bed1f0c0d6e3d5dbe4a756ac616a4
mckesson.comconfluent-verification=541d1a45-5c2a-429e-a338-ef9615ca1ad1
mckesson.comdtm-domain-verification=VRH4QrbDxMHx_4XZUhOvXE6PZoNsmpGFyH29XYPiQlE
mckesson.comv=spf1 include:_spf.salesforce.com include:servers.mcsv.net include:_spf1.mckesson.com include:_spf2.mckesson.com include:spf.bananatag.com -all
mckesson.comcisco-ci-domain-verification=11639d183f9931f8613d0654b76fdda53997b8159e221281d91da36a0828f2aa
mckesson.comcisco-ci-domain-verification=4e309c77f94583d3a2ee7bf19aac482e4cad58d57b6a56ca4dcd64b2f70736f0
mckesson.comcisco-ci-domain-verification=396f165b1d431836f6292b5380f17d00a6440cdb5240ba0f1b9846795326ea53
mckesson.comsalesforce-domain-verification=00DHs000003UJ1b=1TBVn00000008Qb
mckesson.comsalesforce-domain-verification=00Dj0000001rs61=1TBKI000000Kyp4
mckesson.comsalesforce-domain-verification=00DWA000005d8Vt=1TBWA0000004lBd
mckesson.comsalesforce-domain-verification=00D500000007dLz=1TBKi0000010wBf
mckesson.comidentrust_validate=U47odMbBtQimYDVksvbZlqog+l5gitOaUasGYz3UZBG0
mckesson.comcisco-ci-domain-verification=c44783fe2b02864df80cef4333033d43581a317ecd452ebef5b924386bb5ad7
mckesson.com6HW7VbdC46TvxVWoSe8CnRarsoe0IibIHVDYTKDU+DsgOFSs4+umn4U01hLn/Pv3VVuZJ8Aj7ceI+s9y8k6dpw==
mckesson.comatlassian-domain-verification=gsDuvpVuuRKIaIKumVqSuZQSQRKqU3N1C1k1fzdGarBkVd2VGgHI8jzltiZ6hQJ5
mckesson.comgoogle-site-verification=0uAVGaP0T4zaAKC1RnZWuA0XF5cLfnHVcEMmHSit8Kw
mckesson.comciscocidomainverification=68215d26e8053d31a1fbd9f1d25a25684a4562873b43c57453678a63b274a9c5
mckesson.comAJIj3IyYGuA39n0ASGhvJU6JomRwVXJxgp/MjK0iPix0EjidtRhaVC1EZ1X9awXcDetmM6sLzye7OuoolIqMdw==
mckesson.comdocusign=f98e2957-5daa-440f-a522-187ee7b26774
mckesson.comgoogle-site-verification=dVh-bwFVWejx17HEYQc7Ff9EBUYz4HpsAmX5G45sFzM
mckesson.comonetrust-domain-verification=f915b4562bf044bd9336ceee2559d597
mckesson.comonetrust-domain-verification=20e3bc9e9f6e4c3589d4e6f1aabfa049
mckesson.comDynatrace-site-verification=da530ba1-8c85-4a5d-bd59-7c0b5d0759fd__fk0m69autih7be45qtqgkubr6i
mckesson.comgoogle-site-verification=WdQTxQ6QBrJR2XLMwGsjc2D4INRQBoUdN4h1-DKBDuY
mckesson.comqzhzp53gb3ptqd646m546xr8zqjplv3v
_dmarc.mckesson.comv=DMARC1; p=reject; adkim=r; aspf=r; fo=1; pct=100; rf=afrf; ri=86400; rua=mailto:[email protected]; ruf=mailto:[email protected]
selector1._domainkey.mckesson.comv=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDPu7Stu2wyb/co0yaTKV9yMHv/574NsfRexyUnezjNqcf7kitXV1BJXMpf0UIpMB7VGxCer8Gq1XtO9eoffB2wj4wuZI/jDPEMKf39c5SDrOQPZQ8SfFeNIaWaVbnA5LaMfDmyAVN/9yJNuknRAabgkftsdGUIXtlt7/iUIS1TjwIDAQAB; n=1024,1450859158,1466670358
k1._domainkey.mckesson.comk=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDbNrX2cY/GUKIFx2G/1I00ftdAj713WP9AQ1xir85i89sA2guU0ta4UX1Xzm06XIU6iBP41VwmPwBGRNofhBVR+e6WHUoNyIR4Bn84LVcfZE20rmDeXQblIupNWBqLXM1Q+VieI/eZu/7k9/vOkLSaQQdml4Cv8lb3PcnluMVIhQIDAQAB;
k2._domainkey.mckesson.comv=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv2aC2KjGKLOwTweBY5A9RpjsxaBXR9r7OAU6U8/zn92ivImI75naUujWbItRI/QmL1jy5PWGqLwoUA0b90ObWaLDc+i9MtTNmGeWO009hr20fIxhGg6XBT2kjZ1DTThopSe1nAndsupmcBwlQ5Q6LJ+ZAxLcujnPIxM0ZBLmgpkv8u6RfY4eFP8OLvdAW3oSuB0DyLDigQX4Sj8wBO4YIdQH6AAmBeOsidsKAFNFUCpc3vCxtBDR12U+cBg724l3sBkMQ8evnz6idnqxq9QAVYh8k4kJ+RP+6cqTdy7LjIm8xY/bQNpQIpGUAuDo2DjLcCDun9DAI4Q/3z+Q0o9QuQIDAQAB;
k3._domainkey.mckesson.comv=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsYGiMSn7fsUqSvfSX40x9R1OlRtbNiCY80lHRIlcKx3XDIR7257aUx+q9CSIARdfTL6KCuLGNFx5g9TgVr6png4ajcieSQGtOehBgxnkDN8aAA5TX0FmFrcefJU0JoxLOF09EKgXxhSSHCk/ekVb0PXSboHXoZ9+EI404F1qhcwXXIgHXTaUthHTut2P6BBZhIXIgvDe/w49GchR7MRJqjNb7neEBbYHbgWuBTvvHCg7Gy6m6n9krYK+ROWq3dVvXy9plAGK3ygM+HtjIiMt7arRGMOF0WgDTz7YdN9BGpt6BvXxLnjiQcgS5T9n+cIyPZgiWzDMXNlaEEdKTEKxrwIDAQAB;
s1._domainkey.mckesson.comk=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqH/gk1oSkht+HPouoRQNQvuccKrD3yxJh2vwco8ESfWelq+Nl+ausduafzbLECSDcrjnovsdPu1QtMFidrz45Eq5JXODb9DgrFCktrLQn85yHjAMh9wpkAYPd9spOu+k8kHa2L45a0Drt3aAkvOi3d4uPempfd7wVQOrYL86CxAVh4yujvGWa6Q4FeEUFl7X6r1CA68IMeHOerf5aaNiFQpccXDSqDSzcvourBrqHDU3PL5W3KDK3TnrbbiZ+Z+EjCiqqPYXyzBLgEg8BhNTjL0kueNQhhzOXVjFwnubkt+QOUx0s+T7ICDrp8Iyk/ksDlKVt/sP1Up6NC7bxz07GQIDAQAB
s2._domainkey.mckesson.comk=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCZdXNt2MKWoyBgSL9a0f2kP5hyvExwkh2uIq01+PBOlH200hTVAK1iLdBBQQ15DMAd9ScmO2vKeK69om5l3VRbu0JDzOL2KgDdFWXxkJOBlJnj1zaLypBZfWVN5/Ot2nswr0Ug3VkSjUPhW19GzLAgk4RvTM8+bGu0Mx6e9m8G7QIDAQAB

Related IP addresses

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

IP addressUsed for/24 block
45.60.171.26Website45.60.171.0/24
45.60.151.26Website45.60.151.0/24
208.94.148.13Name server ep2ns01.mckesson.com208.94.148.0/24
198.51.44.5Name server ep1ns01.mckesson.com198.51.44.0/24
208.80.126.13Name server ep2ns03.mckesson.org208.80.126.0/24
198.51.45.5Name server ep1ns02.mckesson.net198.51.45.0/24
208.80.124.13Name server ep2ns02.mckesson.net208.80.124.0/24
198.51.44.69Name server ep1ns03.mckesson.org198.51.44.0/24
198.51.45.69Name server ep1ns04.mckesson.com198.51.45.0/24
148.163.143.65Mail server mx0b-0016dd01.pphosted.com148.163.143.0/24
148.163.147.116Mail server mx0a-0016dd01.pphosted.com148.163.147.0/24

WHOIS of the domain mckesson.com

Domain Name: MCKESSON.COM
   Registry Domain ID: 1720391_DOMAIN_COM-VRSN
   Registrar WHOIS Server: whois.corporatedomains.com
   Registrar URL: http://cscdbs.com
   Updated Date: 2026-10-01T11:42:57Z
   Creation Date: 1994-11-09T05:00:00Z
   Registry Expiry Date: 2027-11-08T05:00:00Z
   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: EP1NS01.MCKESSON.COM
   Name Server: EP1NS02.MCKESSON.NET
   Name Server: EP1NS03.MCKESSON.ORG
   Name Server: EP1NS04.MCKESSON.COM
   Name Server: EP2NS01.MCKESSON.COM
   Name Server: EP2NS02.MCKESSON.NET
   Name Server: EP2NS03.MCKESSON.ORG
   DNSSEC: unsigned
   URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2026-10-02T00:10:28Z <<<

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

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