Dataweaz

dropbox.com

Summary

Registrar
MarkMonitor Inc.
Status
clientDeleteProhibited
Created on
June 28, 1995
Expires on
June 27, 2027
Name servers
ns-1949.awsdns-51.co.uk, ns-564.awsdns-06.net, ns-1162.awsdns-17.org, ns-315.awsdns-39.com
Mail servers
mxa-001ed902.gslb.pphosted.com, mxb-001ed902.gslb.pphosted.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 dropbox.com but fails SPF and DKIM checks.

Policy
Reject
Subdomain policy
Reject
Messages covered
100%
DKIM alignment
Relaxed
SPF alignment
Relaxed
Failure reports
—

Record

v=DMARC1;p=reject;pct=100;rua=mailto:[email protected],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 dropbox.com.

RuleValueResult
ip445.58.64.0/20Allowed
ip4185.45.8.0/22Allowed
ip4162.125.0.0/16Allowed
ip4199.47.216.0/22Allowed
ip4108.160.160.0/20Allowed
ip4205.189.0.0/24Allowed
ip4160.34.15.16/28Allowed
ip452.5.134.202/32Allowed
ip4205.220.162.87/32Allowed
ip4205.220.174.83/32Allowed
ip4167.89.98.146/32Allowed
ip4167.89.89.46/32Allowed
ip4167.89.96.134/32Allowed
ip4159.183.109.97/32Allowed
ip4149.72.220.85/32Allowed
ip4159.183.15.144/32Allowed
ip4159.183.2.51/32Allowed
ip4159.183.2.58/32Allowed
ip62620:c6:8000::/48Allowed
includeamazonses.comAllowed
include_spf.google.comAllowed
includemail.zendesk.comAllowed
includemktomail.comAllowed
includerp.oracleemaildelivery.comAllowed
exists%{i}._spf.mta.salesforce.comAllowed
all—Suspicious

Top-level DNS lookups: 6 of 10 allowed

Record

v=spf1 ip4:45.58.64.0/20 ip4:185.45.8.0/22 ip4:162.125.0.0/16 ip4:199.47.216.0/22 ip4:108.160.160.0/20 ip4:205.189.0.0/24 ip4:160.34.15.16/28 ip4:52.5.134.202/32 ip4:205.220.162.87/32 ip4:205.220.174.83/32 ip4:167.89.98.146/32 ip4:167.89.89.46/32 ip4:167.89.96.134/32 ip4:159.183.109.97/32 ip4:149.72.220.85/32 ip4:159.183.15.144/32 ip4:159.183.2.51/32 ip4:159.183.2.58/32 ip6:2620:c6:8000::/48 include:amazonses.com include:_spf.google.com include:mail.zendesk.com include:mktomail.com include:rp.oracleemaildelivery.com exists:%{i}._spf.mta.salesforce.com ~all

E-mail signing (DKIM)

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

SelectorLikely serviceKeyStatus
zendesk1ZendeskRSA 2048 bitsActive
zendesk2ZendeskRSA 2048 bitsActive

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

dropbox.com  MX  10 mx1.dropbox.com.
dropbox.com  MX  20 mx2.dropbox.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.dropbox.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

dropbox.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.dropbox.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.dropbox.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.dropbox.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.dropbox.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 dropbox.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
A162.125.248.18
AAAA2620:100:6040:18::a27d:f812

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
ns-1949.awsdns-51.co.uk205.251.199.157
ns-564.awsdns-06.net205.251.194.52
ns-1162.awsdns-17.org205.251.196.138
ns-315.awsdns-39.com205.251.193.59

Mail servers (MX)

MX records point to the servers that receive e-mails sent to the domain, that is to @dropbox.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
10mxa-001ed902.gslb.pphosted.com205.220.162.87
10mxb-001ed902.gslb.pphosted.com205.220.162.87

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.dropbox.com.

NameContent
dropbox.comslack-domain-verification=1qkjOc6gwuxLaFmX90NDKDiQVw0k4aNHyeT15kdt
dropbox.comstripe-verification=7f4c0115f99ee7bc4ed67beff4365dd6b29ec5e4cfca03b874d2de54fb1730a3
dropbox.comstripe-verification=5A1286A45D18E28C4909AD9CAA70017D493E1A09417FB572992366CEC23DE9D3
dropbox.comgoogle-site-verification=eL_MhPPeLDIVMzQmUh8cQlm1zzdyZRZs7a5aVqrTPKc
dropbox.comgoogle-site-verification=2_3MpLNP3RT2WDZTWn2VErDq0zTl7-IOZMviotkEhEQ
dropbox.comgoogle-site-verification=u07OaGer3GQQDKmGdXvEnVDA7hVQJZ3nVglkGqTxnqI
dropbox.comstripe-verification=ADB471381BCF8F6CF5635864612A5C41B09F3AD2E69F0BC675D96AB24CCCD5FC
dropbox.comparallels-domain-verification=c22a91cd65da42ee92515d4d96940a8caed8b947d0ed4a37b1fa8cf8dbdd64b5
dropbox.comgoogle-site-verification=6Gs0C-CwJui707tVZirEFGKvKfGtwwZf2Snzz0-2nUQ
dropbox.comdocker-verification=215c893f-0bb3-4887-87a2-152ae8636422
dropbox.comstripe-verification=abd8d702e1361e583deb9f1085ca164782f13f205b1b8b04225f9bac41c3f744
dropbox.comliveramp-site-verification=l9GQet4bxvwWtgD1svh_74N5vOes7buz_drCyiY-dV4
dropbox.comgoogle-site-verification=cPTvnO7zyyCEASSqXGDlzGgEECA-hWG7k_drsp-f9RA
dropbox.cominfoblox-domain-mastery=d893f536feb426f7bcef35610e78c319a79a9585e03a3cbf753c589e58db5dbfae
dropbox.comzapier-domain-verification-challenge=2d9f161a-cc7a-4780-862d-04aa31320698
dropbox.commiro-verification=06f0d83f07b5b7c1936df29f6dc8a6a11cf82d08
dropbox.comnotion-domain-verification=enHWmn6FFlHvaUid8AdXGKPkDn7j1VVAKudIomtvw0z
dropbox.comlovable_verification=oimC5YnefHVCMkPlojvq
dropbox.comaws-domain-control-verification=fa66314d-b786-43ac-ba00-a2fc8c8da6c2
dropbox.comatlassian-domain-verification=yjrZDQ/hCS3k4pk87lelfsKb7+aOLpQPPgowWw/RHEwDCvNo8zH2iNCjFjZZtPvT
dropbox.comstripe-verification=d0a25558a690907c8476879165000a457c5521640f0be53b0d1acf5f4c311978
dropbox.comgoogle-site-verification=dvbnC9kulo9yolnth_U5l7fMneacmwsmc7T-amaztiY
dropbox.comhcp-domain-verification=70f13e6db06700814cb6a41bc0b14c0b02d972a58a16bc566918d50ecff3e2f7
dropbox.comdocusign=c18a935e-b7a7-4ca5-a401-9f7cac288c0b
dropbox.comdecagon-domain-verification-v0ye0x=hK1f8wt5pCP112ZomGdWacypL
dropbox.comstripe-verification=fc5d818b64666e2f2da6e857d432a8278df3bcadcb7dce142103841f6045a54f
dropbox.comgoogle-site-verification=2ZBxb1JI0xc_p5crqO_FHyV6OO3iYuvryuZj4nUNCEc
dropbox.comcursor-domain-verification-me5gdt=FG4EqpnCbcfCNcVW9qV0OYu9R
dropbox.comgoogle-site-verification=8NWlYGBCOsGGZoWB62V0z-I1v92RPDYt5e2MIcIlKOk
dropbox.commixpanel-domain-verify=c8f954c8-17fc-42a3-925c-6ea23ee3b534
dropbox.comapple-domain-verification=6wGFrdfZ2TC4HlEk
dropbox.comcloudflare_dashboard_sso=4da1dd6908c0c13a852ab394101eafe2
dropbox.com1e6de3584eb44e3e9fde429fb262995bb3f6422cab16daeff7cba598948242b8
dropbox.comgoogle-site-verification=leXlkd4GKqaMP-t93sX2D_mNej1qyME73hyCvyjkbmA
dropbox.commgverify=32a6a13661e86bff81acaf247c1dd6c5991bccc6a77dbe49f078deef4d61979c
dropbox.comdocusign=a3cf77c9-f563-4c9b-8cbb-73c5322feb8e
dropbox.comaws-domain-control-verification=295d3c77-d647-4042-a10b-17bc6cf2a81c
dropbox.comanthropic-domain-verification-jk1bd4=WXuV479YDJRmIn8CJaIpZaW4S
dropbox.comopenai-domain-verification=dv-taySZvuNYfU5nkRTfwxixP7F
dropbox.comhubspot-developer-verification=YTQ0MmYzMzItYjhhOC00YzhlLTg3ZDYtMjU3NWQ4OWY4MDNk
dropbox.comadobe-idp-site-verification=4977108a-46c6-4763-a3cc-b23b3d87e5cc
dropbox.comstripe-verification=58A24CAFE9E3D2B5BC1B57D90B3271230384E4A98B997D269F6E93357C043DF9
dropbox.comv=spf1 ip4:45.58.64.0/20 ip4:185.45.8.0/22 ip4:162.125.0.0/16 ip4:199.47.216.0/22 ip4:108.160.160.0/20 ip4:205.189.0.0/24 ip4:160.34.15.16/28 ip4:52.5.134.202/32 ip4:205.220.162.87/32 ip4:205.220.174.83/32 ip4:167.89.98.146/32 ip4:167.89.89.46/32 ip4:167.89.96.134/32 ip4:159.183.109.97/32 ip4:149.72.220.85/32 ip4:159.183.15.144/32 ip4:159.183.2.51/32 ip4:159.183.2.58/32 ip6:2620:c6:8000::/48 include:amazonses.com include:_spf.google.com include:mail.zendesk.com include:mktomail.com include:rp.oracleemaildelivery.com exists:%{i}._spf.mta.salesforce.com ~all
dropbox.comgoogle-site-verification=vPdXnwB_snnJ8dqzD0OFEhiy3Vjq2l7qhXA-rnWR1lk
dropbox.comhubspot-domain-verification=Y2NiYzY0YjktYzI1MC00NDg5LWI5ZTYtZWY4ZWQ1ZDEwNjdh
dropbox.comcitrix-verification-code=b29deae6-12fa-4939-a5b1-9585f5fc82ba
dropbox.comgoogle-site-verification=rGECt1BQW-vtsJ-FgNwFpxTiTMc2DdQ9ZxAwT8nmbTE
dropbox.comjamf-site-verification=EecmGLwXK6l4sJLtg1ckwQ
dropbox.comgoogle-site-verification=E9R8qj0pQvUF7rQ3x0s0m5Oh8FGBiO-7CQt-hiPQtFs
dropbox.comMS=ms91256510
_dmarc.dropbox.comv=DMARC1;p=reject;pct=100;rua=mailto:[email protected],mailto:[email protected]
zendesk1._domainkey.dropbox.comv=DKIM1;t=s;n=core;k=rsa;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA9IqdLrO3Zr2/56MHt8oQVCQorP0Bl2Fz9sM2tFBnJCdB/HogQmuudEg2xAovCN2PYpw44UijIvPuBoT9vxiv6ZCBJTLJXa82r6ke5rE4tbe9NKFIrVIb9S306cJDrnKFMDb8p0dU/Su0+eUR5gVAOtCuz2L8HAzs5edvsEvD/Fb4ny1RLNSEPZkIQLfGhVxQeWANm3+1Jwb/OBVXV9k0nKpWrpgqcmO7NzroJirp014RQY7rGi60JLUubc6XhvoFQBQrtOAdVlZC5wvfS1bgpq5kQpdP7cajIqWCeqxPTeo0ZUpey2ZcaygEsZz0Z3Gs5wDzyuqd7/ADpr2jNF7ozwIDAQAB
zendesk2._domainkey.dropbox.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 dropbox.com: website, name servers, mail servers and senders authorized by SPF.

IP addressUsed for/24 block
162.125.248.18Website162.125.248.0/24
205.251.199.157Name server ns-1949.awsdns-51.co.uk205.251.199.0/24
205.251.194.52Name server ns-564.awsdns-06.net205.251.194.0/24
205.251.196.138Name server ns-1162.awsdns-17.org205.251.196.0/24
205.251.193.59Name server ns-315.awsdns-39.com205.251.193.0/24
205.220.162.87Mail server mxa-001ed902.gslb.pphosted.com, Mail server mxb-001ed902.gslb.pphosted.com, Authorized by SPF205.220.162.0/24
52.5.134.202Authorized by SPF52.5.134.0/24
205.220.174.83Authorized by SPF205.220.174.0/24
167.89.98.146Authorized by SPF167.89.98.0/24
167.89.89.46Authorized by SPF167.89.89.0/24
167.89.96.134Authorized by SPF167.89.96.0/24
159.183.109.97Authorized by SPF159.183.109.0/24
149.72.220.85Authorized by SPF149.72.220.0/24
159.183.15.144Authorized by SPF159.183.15.0/24
159.183.2.51Authorized by SPF159.183.2.0/24
159.183.2.58Authorized by SPF159.183.2.0/24

WHOIS of the domain dropbox.com

Domain Name: DROPBOX.COM
   Registry Domain ID: 963471_DOMAIN_COM-VRSN
   Registrar WHOIS Server: whois.markmonitor.com
   Registrar URL: http://www.markmonitor.com
   Updated Date: 2025-05-26T09:29:30Z
   Creation Date: 1995-06-28T04:00:00Z
   Registry Expiry Date: 2027-06-27T04:00:00Z
   Registrar: MarkMonitor Inc.
   Registrar IANA ID: 292
   Registrar Abuse Contact Email: [email protected]
   Registrar Abuse Contact Phone: +1.2086851750
   Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
   Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
   Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited
   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: NS-1162.AWSDNS-17.ORG
   Name Server: NS-1949.AWSDNS-51.CO.UK
   Name Server: NS-315.AWSDNS-39.COM
   Name Server: NS-564.AWSDNS-06.NET
   DNSSEC: unsigned
   URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2026-10-02T21:59:58Z <<<

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
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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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