- .cat domains may have a maximum of 63 characters and a minimum of 2.
- The accepted characters for domain registration are: a-z, 0-9 and - (hyphen). The hyphen cannot be placed at the beginning or end of the name.
- A .cat domain can be renewed for a maximum period of up to 10 years.
- .cat domains cannot be transferred if they are expired.
- .cat domains cannot be transferred if they are in the clientTransferProhibited status.
- To initiate the transfer of .cat domains, the AUTHCODE is required.
- To approve the transfer of a .cat domain, access to the administrative contact email is required.
Since they have an expiration date, domains go through several phases or periods. This lifecycle is established by ICANN, the entity responsible for the regulations applicable to domains. In the following chart you can see the lifecycle of a .cat domain and its states.
- Available domain: the domain has not yet been registered and is therefore available. When a registration request is submitted, it will be assigned to the first request received.
- Registered domain: when a request is sent for an available domain, it is assigned to the requesting person. Registration can be requested for a period of 1 to 10 years.
- Active domain: the domain remains active for the number of years requested. During this period, additional years can be added to prevent expiration.
- Grace period: the domain has expired and stops working. This period lasts 30 days and allows renewal without penalty fees.
- Redemption period: this period lasts 30 days. The domain has been deleted but can be restored and renewed at a higher cost than the usual renewal price.
- Pending delete: the domain can no longer be restored and will be released.
Since its creation, the .cat domain supports the IDN specification (Internationalized Domain Names). It allows the use of any character in the Catalan alphabet except the apostrophe: à é è í ï ó ò ú ü ç l·l.
However, the registration process for a .cat domain with special characters is different from other IDN domains. To have a .cat domain with a special character, you must have the homonymous domain without the special character. For example, to request cdmón.cat, you are actually registering cdmon.cat, and the IDN variant cdmón.cat is added. Unlike other extensions such as .es, where cdmón.es and cdmon.es are independent. The advantage is that paying for a single .cat domain gives you all IDN variants.
.cat IDN domains are special because they are linked to the main domain and automatically redirect to it. You must create a hosting alias so that the IDN domain works and points correctly to the hosting.
The following table shows the valid special character variations in relation to the homonymous domain without the special character:
| Special character | Homonymous character | Example |
| à | a | to have català.cat, you actually register catala.cat |
| é | e | préssec.cat ⇒ pressec.cat |
| è | e | agència.cat ⇒ agencia.cat |
| í | i | destí.cat ⇒ desti.cat |
| ï | i | traït.cat ⇒ trait.cat |
| ó | o | fundació.cat ⇒ fundacio.cat |
| ò | o | ressò.cat ⇒ resso.cat |
| ú | u | algú.cat ⇒ algu.cat |
| ü | u | piragüisme.cat ⇒ piraguisme.cat |
| ç | c | vicenç.cat ⇒ vicenc.cat |
| l·l | l-l | col·legi.cat ⇒ col-legi.cat |
How to register a .cat IDN domain?
To simplify the process, you must request the registration using the special character directly from the domain registration page. Search for the domain with the special character; the system will check availability and indicate whether you can register it. When processing the registration, the system actually registers the domain without the special character and adds the IDN variant. For example, if you search for explicación.cat, the system will show that it is available. When processed, it registers explicacion.cat and adds the IDN variant explicación.cat. Both domains work separately, but only the non-IDN version is actually registered.
Transferring domains with special characters (IDN)
You can transfer your .cat domain registered with another provider through our domain transfer page. For transfers, you must enter the domain name without the special character, using its homonymous version (see conversion table above).