Year 86 (LXXXVI) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Augustus and (or, less frequently, year 839 Ab urbe condita). The denomination 86 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Continuous redial, busy number redial, or repeat dial, is a vertical service code (calling feature) that allows callers to automatically redial a busy telephone number until a connection is made. It is activated by dialing a combination of special characters and numbers after hanging up following a call to a busy line. It will run for a set period of time (such as 30 minutes) and can be deactivated by entering either the same set of numbers or a different set. The North American Numbering Plan assigned *66 to activate continuous redial and *86 to deactivate it.

Telephone numbers in China are organized and assigned according to the Chinese Telephone Code Plan of mainland China. Land lines and mobile telephone numbers have different structures: land lines use area codes, while mobile phones do not. Land line phone numbers in major cities have 8 digits after the two digit area code, whereas in other areas no less than 7 digits after a three digit area code. Mobile phone numbers have 11 digits without area codes.

Year 86 (LXXXVI) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Augustus and (or, less frequently, year 839 Ab urbe condita). The denomination 86 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Continuous redial, busy number redial, or repeat dial, is a vertical service code (calling feature) that allows callers to automatically redial a busy telephone number until a connection is made. It is activated by dialing a combination of special characters and numbers after hanging up following a call to a busy line. It will run for a set period of time (such as 30 minutes) and can be deactivated by entering either the same set of numbers or a different set. The North American Numbering Plan assigned *66 to activate continuous redial and *86 to deactivate it.

Telephone numbers in China are organized and assigned according to the Chinese Telephone Code Plan of mainland China. Land lines and mobile telephone numbers have different structures: land lines use area codes, while mobile phones do not. Land line phone numbers in major cities have 8 digits after the two digit area code, whereas in other areas no less than 7 digits after a three digit area code. Mobile phone numbers have 11 digits without area codes.