| Code | Display | Definition | 
| phone  | 
Phone | 
The value is a telephone number used for voice calls. Use of full international numbers starting with + is recommended to enable automatic dialing support but not required. | 
| fax  | 
Fax | 
The value is a fax machine. Use of full international numbers starting with + is recommended to enable automatic dialing support but not required. | 
| email  | 
Email | 
The value is an email address. | 
| pager  | 
Pager | 
The value is a pager number. These may be local pager numbers that are only usable on a particular pager system. | 
| url  | 
URL | 
A contact that is not a phone, fax, pager or email address and is expressed as a URL.  This is intended for various institutional or personal contacts including web sites, blogs, Skype, Twitter, Facebook, etc. Do not use for email addresses. | 
| sms  | 
SMS | 
A contact that can be used for sending a sms message (e.g. mobile phones, some landlines). | 
| other  | 
Other | 
A contact that is not a phone, fax, page or email address and is not expressible as a URL.  E.g. Internal mail address.  This SHOULD NOT be used for contacts that are expressible as a URL (e.g. Skype, Twitter, Facebook, etc.)  Extensions may be used to distinguish "other" contact types. |