Summary
- Registrar
- OVH
- Status
- clientDeleteProhibited
- Created on
- January 30, 2022
- Expires on
- January 30, 2027
- Name servers
- maleah.ns.cloudflare.com, zeus.ns.cloudflare.com
- Mail servers
- mx.adsl.cat
- DMARC
- Reject
- SPF
- Soft
- DKIM
- 1 key found
- Website
- See the website
Spoofing protection (DMARC)
E-mails spoofing this domain are rejected.
DMARC tells mail servers what to do with an e-mail that claims to come from adsl.cat but fails SPF and DKIM checks.
- Policy
- Reject
- Subdomain policy
- Reject
- Messages covered
- 100%
- DKIM alignment
- Relaxed
- SPF alignment
- Relaxed
- Aggregate reports
- —
- Failure reports
- —
Record
v=DMARC1; p=reject; adkim=r; aspf=r
Authorized senders (SPF)
E-mails sent by any other server are accepted but flagged as suspicious.
SPF lists the servers allowed to send e-mails for adsl.cat.
| Rule | Value | Result |
|---|---|---|
| mx | — | Allowed |
| a | mx.adsl.cat | Allowed |
| ip4 | 15.204.53.84 | Allowed |
| all | — | Suspicious |
Top-level DNS lookups: 2 of 10 allowed
Record
v=spf1 mx a:mx.adsl.cat ip4:15.204.53.84 ~all
E-mail signing (DKIM)
DKIM keys published by adsl.cat under the most common selectors. Other keys may exist under selectors specific to each sending service.
| Selector | Likely service | Key | Status |
|---|---|---|---|
| dkim | — | RSA 2048 bits | Active |
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 adsl.cat arrive; SPF, DKIM and DMARC let mail servers check that an e-mail claiming to come from adsl.cat 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 @adsl.cat 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
adsl.cat MX 10 mx1.adsl.cat. adsl.cat MX 20 mx2.adsl.cat.
What the record contains
- 10, 20
- Priority: the server with the lowest number is tried first. Servers with equal priority share the load.
- mx1.adsl.cat.
- 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
adsl.cat 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.adsl.cat, 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.adsl.cat 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.adsl.cat, 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.adsl.cat 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 adsl.cat
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.
| Type | IP address |
|---|---|
| A | 104.21.28.54 |
| A | 172.67.144.68 |
| AAAA | 2606:4700:3034::ac43:9044 |
| AAAA | 2606:4700:3032::6815:1c36 |
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.
| Server | IP address |
|---|---|
| maleah.ns.cloudflare.com | 172.64.34.118 |
| zeus.ns.cloudflare.com | 173.245.59.249 |
Mail servers (MX)
MX records point to the servers that receive e-mails sent to the domain, that is to @adsl.cat 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.
| Priority | Server | IP address |
|---|---|---|
| 10 | mx.adsl.cat | 51.81.239.139 |
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.adsl.cat.
| Name | Content |
|---|---|
| adsl.cat | v=spf1 mx a:mx.adsl.cat ip4:15.204.53.84 ~all |
| _dmarc.adsl.cat | v=DMARC1; p=reject; adkim=r; aspf=r |
| dkim._domainkey.adsl.cat | v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAx5b7DTYDY6oz1HWZWc6NHH/YQ7OeCZuG2kP+ZCW/le3XAI7c6vproXydEzjdLsreffRmzKKKcJH5r03OQ3fsuhNtKQEUmJJvoNuGyXS8e+qUO+Epp6H9JPlYpnshXf1uxhHmnqEVVBohoXEqBmINW0lQ4M9vm1Qa2uCIcBbsjKqddIL2maUalN8KZuBO+pnWyfGxrKRQCWKTPpciUchatwri9mcvDlhz+Clzzh4ifnGgvM0GYIicvqNnMilYpc/ow/nsDSUzuOOAwR3e97pswH6rl44HHM72yoKowLsm8TjkEDkD0eiFQ8qR6RallaMdVQnMs2K0gH4XyN4p5aJZVwIDAQAB |
Related IP addresses
IPv4 addresses used by adsl.cat: website, name servers, mail servers and senders authorized by SPF.
| IP address | Used for | /24 block |
|---|---|---|
| 104.21.28.54 | Website | 104.21.28.0/24 |
| 172.67.144.68 | Website | 172.67.144.0/24 |
| 172.64.34.118 | Name server maleah.ns.cloudflare.com | 172.64.34.0/24 |
| 173.245.59.249 | Name server zeus.ns.cloudflare.com | 173.245.59.0/24 |
| 51.81.239.139 | Mail server mx.adsl.cat | 51.81.239.0/24 |
| 15.204.53.84 | Authorized by SPF | 15.204.53.0/24 |
WHOIS of the domain adsl.cat
Domain Name: adsl.cat Registry Domain ID: Dgpfw263056-CAT Registrar WHOIS Server: whois.ovh.com Registrar URL: https://www.ovh.com Updated Date: 2026-01-01T11:00:09.86Z Creation Date: 2022-01-30T15:47:13.957Z Registry Expiry Date: 2027-01-30T15:47:13.957Z Registrar Registration Expiration Date: Registrar: OVH Registrar IANA ID: 433 Registrar Abuse Contact Email: [email protected] Registrar Abuse Contact Phone: +33.972101007 Reseller: Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited Registry Registrant ID: Registrant Name: Registrant Organization: Registrant Street: Registrant City: Registrant State/Province: Registrant Postal Code: Registrant Country: HK Registrant Phone: Registrant Phone Ext: Registrant Fax: Registrant Fax Ext: Registrant Email: Please query the Whois service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name. Registry Admin ID: Admin Name: Admin Organization: Admin Street: Admin City: Admin State/Province: Admin Postal Code: Admin Country: Admin Phone: Admin Phone Ext: Admin Fax: Admin Fax Ext: Admin Email: Please query the Whois service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name. Registry Tech ID: Tech Name: Tech Organization: Tech Street: Tech City: Tech State/Province: Tech Postal Code: Tech Country: Tech Phone: Tech Phone Ext: Tech Fax: Tech Fax Ext: Tech Email: Please query the Whois service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name. Registry Billing ID: Billing Name: Billing Organization: Billing Street: Billing City: Billing State/Province: Billing Postal Code: Billing Country: Billing Phone: Billing Phone Ext: Billing Fax: Billing Fax Ext: Billing Email: Please query the Whois service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name. Name Server: zeus.ns.cloudflare.com Name Server: maleah.ns.cloudflare.com DNSSEC: signedDelegation Canonical Name: adsl.cat IDN Tag: ca URL of the ICANN Whois Inaccuracy Complaint Form: https://icann.org/wicf >>> Last update of Whois database: 2026-10-01T21:30:23.158Z <<< For more information on domain status codes, please visit https://icann.org/epp This domain has chosen privacy settings according to the European data protection framework provisions. Should you need to contact the registrant, please see http://www.domini.cat/contact-registrant For law enforcement and trademark protection purposes, see http://www.domini.cat/whois-access In case of technical problems, please see http://www.domini.cat/report-problem Terms and Conditions of Use The data in this record is provided by puntCAT for informational purposes only. puntCAT does not guarantee its accuracy and cannot, under any circumstances, be held liable in case the stored information would prove to be wrong, incomplete or not accurate in any sense. All the domain data that is visible in the Whois service is protected by law. It is not permitted to use it for any purpose other than technical or administrative requirements associated with the operation of the Internet. It is explicitly forbidden to extract, copy and/or use or re-utilise in any form and by any means (electronically or not) the whole or a quantitatively or qualitatively substantial part of the contents of the Whois database without prior and explicit written permission by puntCAT It is prohibited, in particular, to use it for transmission of unsolicited and/or commercial and/or advertising by phone, fax, e-mail or for any similar purposes. By maintaining the connection you assure that you have a legitimate interest in the data and that you will only use it for the stated purposes. You are aware that puntCAT maintains the right to initiate legal proceedings against you in the event of any breach of this assurance and to bar you from using its Whois service. End of Whois record. Domain Name: adsl.cat Registry Domain ID: REDACTED FOR PRIVACY Registrar WHOIS Server: whois.ovh.com Registrar URL: https://ovh.com Updated Date: 2026-01-01T11:00:09Z Creation Date: 2022-01-30T15:47:13Z Registrar Registration Expiration Date: 2026-01-30T16:47:17+01:00 Registrar: OVH, SAS Registrar IANA ID: 433 Registrar Abuse Contact Email: [email protected] Registrar Abuse Contact Phone: +33.972101007 Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited Registry Registrant ID: REDACTED FOR PRIVACY Registrant Name: REDACTED FOR PRIVACY Registrant Organization: REDACTED FOR PRIVACY Registrant Street: REDACTED FOR PRIVACY Registrant City: REDACTED FOR PRIVACY Registrant State/Province: REDACTED FOR PRIVACY Registrant Postal Code: REDACTED FOR PRIVACY Registrant Country: HK Registrant Phone: REDACTED FOR PRIVACY Registrant Phone Ext: REDACTED FOR PRIVACY Registrant Fax: REDACTED FOR PRIVACY Registrant Fax Ext: REDACTED FOR PRIVACY Registrant Email: REDACTED FOR PRIVACY - Send message to contact by visiting https://ovhcloud.com/en/lp/request-ovhcloud-registered-domain/ Registry Admin ID: REDACTED FOR PRIVACY Admin Name: REDACTED FOR PRIVACY Admin Organization: REDACTED FOR PRIVACY Admin Street: REDACTED FOR PRIVACY Admin City: REDACTED FOR PRIVACY Admin State/Province: REDACTED FOR PRIVACY Admin Postal Code: REDACTED FOR PRIVACY Admin Country: HK Admin Phone: REDACTED FOR PRIVACY Admin Phone Ext: REDACTED FOR PRIVACY Admin Fax: REDACTED FOR PRIVACY Admin Fax Ext: REDACTED FOR PRIVACY Admin Email: REDACTED FOR PRIVACY - Send message to contact by visiting https://ovhcloud.com/en/lp/request-ovhcloud-registered-domain/ Registry Tech ID: REDACTED FOR PRIVACY Tech Name: REDACTED FOR PRIVACY Tech Organization: REDACTED FOR PRIVACY Tech Street: REDACTED FOR PRIVACY Tech City: REDACTED FOR PRIVACY Tech State/Province: REDACTED FOR PRIVACY Tech Postal Code: REDACTED FOR PRIVACY Tech Country: HK Tech Phone: REDACTED FOR PRIVACY Tech Phone Ext: REDACTED FOR PRIVACY Tech Fax: REDACTED FOR PRIVACY Tech Fax Ext: REDACTED FOR PRIVACY Tech Email: REDACTED FOR PRIVACY - Send message to contact by visiting https://ovhcloud.com/en/lp/request-ovhcloud-registered-domain/ Name Server: maleah.ns.cloudflare.com Name Server: zeus.ns.cloudflare.com DNSSEC: signedDelegation URL of the ICANN WHOIS Data Problem Reporting System: http://wdprs.internic.net/ >>> Last update of WHOIS database: 2026-01-01T11:00:21Z <<< For more information on Whois status codes, please visit https://icann.org/epp ############################################################################### # # Welcome to the OVH WHOIS Server. # # whois server : whois.ovh.com check server : check.ovh.com # # The data in this Whois is at your disposal with the aim of supplying you the # information only, that is helping you in the obtaining of the information # about or related to a domain name registration record. OVH Sas make this # information available "as is", and do not guarantee its accuracy. By using # Whois, you agree that you will use these data only for legal purposes and # that, under no circumstances will you use this data to: (1) Allow, enable, # or otherwise support the transmission of mass unsolicited, commercial # advertisement or roughly or requests via the individual mail (courier), # the E-mail (SPAM), by telephone or by fax. (2) Enable high volume, automated, # electronic processes that apply to OVH Sas (or its computer systems). # The copy, the compilation, the re-packaging, the dissemination or the # other use of the Whois base is expressly forbidden without the prior # written consent of OVH. Domain ownership disputes should be settled using # ICANN's Uniform Dispute Resolution Policy: http://www.icann.org/udrp/udrp.htm # We reserve the right to modify these terms at any time. By submitting # this query, you agree to abide by these terms. 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(2) # l'utilisation d'un grand volume, automatisé des processus électroniques qui # soulignent ou chargent ce système de base de données Whois vous fournissant # cette information. La copie de tout ou partie, la compilation, le # re-emballage, la dissémination ou d'autre utilisation de la base Whois sont # expressément interdits sans consentement écrit antérieur de OVH. Un désaccord # sur la possession d'un nom de domaine peut être résolu en suivant la Uniform # Dispute Resolution Policy de l'ICANN: http://www.icann.org/udrp/udrp.htm # Nous nous réservons le droit de modifier ces termes à tout moment. En # soumettant une requête au Whois vous consentez à vous soumettre à ces termes. # local time : 2026-10-01T21:30:56Z # gmt time : 2026-10-01T21:30:56Z # last modify : 2026-01-01T11:00:21Z % Query time: 1049 msec % WHEN: Thu Oct 01 21:30:55 UTC 2026