Editing Telephone numbering plan (section)

===Full-number dialing===
In small countries or areas, the full telephone number is used for all calls, even in the same area. This has traditionally been the case in small countries and territories where area codes have not been required.  However, there has been a trend in many countries towards making all numbers a standard length, and incorporating the area code into the subscriber's number. This usually makes the use of a trunk code obsolete.
For example, to call someone in Oslo in [[Norway]] before 1992, it was necessary to dial:
* xxx xxx              (within Oslo - no area code required)
* (02) xxx xxx         (within Norway - outside Oslo)
* 47 2 xxx xxx        (outside Norway)

After 1992, this changed to a closed eight-digit numbering plan, e.g.:
* 22xx xxxx     (within Norway - including Oslo)
* 47 22xx xxxx (outside Norway)

However, in other countries, such as [[France]], [[Belgium]], [[Japan]], [[Switzerland]], [[South Africa]] and some parts of North America, the trunk code is retained for domestic calls, whether local or national, e.g.,

* [[Paris]] 01 xx xx xx xx (outside France +33 1 xxxx xxxx)
* [[Brussels]] 02 xxx xxxx (outside Belgium +32 2 xxx xxxx)
* [[Geneva]] 022 xxx xxxx  (outside Switzerland +41 22 xxx xxxx)
* [[Cape Town]] 021 xxx xxxx (outside South Africa +27 21 xxx xxxx)
* [[New York City|New York]] 1 212 xxx xxxx (outside the North American Numbering Plan +1 212 xxx xxxx)
* [[Fukuoka]] 092 xxx xxxx (outside the Japanese Numbering Plan +81 92 xxx xxxx)
* [[India]] "0-10 Digit Number" (outside India +91 XXXXXXXXXX). In India due to the availability of [[Telephone numbers in India|multiple operators]], the metro cities have short codes which range from 2 to 8 digits. 

While some, such as [[Italy]], require the initial zero to be dialed, even for calls from outside the country, e.g.,

* [[Rome]] 06 xxxxxxxx (outside Italy +39 06 xxxxxxxx)

While dialing of full national numbers takes longer than a local number without the area code, the increased use of telephones that can store numbers means that this is of decreasing importance. It also makes it easier to display numbers in the international format, as no trunk code is required—hence a number in [[Prague]], Czech Republic, can now be displayed as:

* 2xx xxx xxx (inside Czech Republic)
* +420 2xx xxx xxx (outside Czech Republic)

as opposed to before September 21, 2002:<ref name="CTO-renumbering2002">{{Cite journal |title=Číslovací plán veřejných telefonních sítí |journal=Telekomunikační Věstník |volume=9/2000 |date=2000-09-25 |publisher=Czech Telecommunication Office |url=http://www.ctu.cz/1/download/cislovaci-plan-verejnych-telefonnich-siti_1114435245.pdf |access-date=2006-10-13 |url-status=dead |archive-url=https://web.archive.org/web/20061101053806/http://www.ctu.cz/1/download/cislovaci-plan-verejnych-telefonnich-siti_1114435245.pdf |archive-date=November 1, 2006 |language=cs}}</ref>

* 02 / xx xx xx xx  (inside Czech Republic)
* +420 2 / xx xx xx xx (outside Czech Republic)