Types of Numbering Plans
- 25th July , 2008 by admin in Codes
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A telephone numbering plan is a plan used to allot international telephone numbers between various countries and regions as well as among cell phone networks. But dial plans are not actually the same thing as numbering plans. As for the closed numbering plan, it is applied in places like North America or Australia so that there phone numbers are used together with special length region codes.
Some countries of the world haven’t by now unified the size of dialing codes and subscriber’s numbers so in these regions the open numbering plan is popular. The numbers defined by this plan are dialed variously. You must know which units should be anyway dialed (they form the local phone number) and which can be omitted (area dialing codes).
Even after the suggestions of the International Telecommunication Union (ITU) to define the standards of numbering plans and international dialing codes they anyway are different in different regions. E.g. 00 was meant to serve as an international code of access. Though it was brought in by some nations the rest of the countries like United States, Canada and other nations keeping to the North American Numbering Plan thought it better not to change the present dialing codes. Mixed up? Try brand new reverse phone directory!
Area codes (the codes that define countries or group of nations) are established by the international numbering plan. In order to define the codes for international calls there is the E.164 standard. It points the common length of the full number. The numbers in every country are just set by its active network. So regional country codes are classified into those that are with:
- Assigned standards of the calling code that includes several units like 3 in Canada or 1 in Australia and New Zealand.
- Indefinite dialing code norms. So in regions like Austria the calling code is between 2 and 5, on japanese isles – between 1 and 5 and in Peru and Syria the code includes from one up to two digits.
- Particular norms offering that the subscriber’s number has the dialing code in its structure, like in Spain or Norway. People know it as “closed” numbering plan. In areas like Italy and Belgium, Switzerland, South Africa or some locations within the NANP people have zero as a long-distance dialing code.
The dialling code of the region mainly lets charge the people for calls correctly. It’s usually a bit cheaper to call on the telephone numbers with your or adjacent area dialling code then on those having area dialing codes of distant regions.
It’s frequently quite on the contrary in States as the prices for home calls are fixed by the state’s representatives. So it turns so that their costs are higher than the prices for interurban calls defined by competition.
Still there are some locations in States where dialling codes serve for a really big area. In this case various prices are applied depending on the distance between the subscribers.
The prices are commonly defined for area segments which are around 6, six-twelve miles and more. Normally they are defined by valuation centers. But as the home calling services were just deregulated things became different.
Today it’s going popular among the subscribers to take the so-called “all-you-can-eat” plan (an assigned rate of about 30 dollars per month as reported for May 2008 allowing to connect with any place of United States).
There may be special calling codes. They are used usually for cell phone systems in those regions where they are paid by the user or for free, premium rates.
There also may be some particular circumstances. E.g. in countries like Egypt area dialling code mean nothing because the prices are similar for the whole country and in the UK the calling code is complete of two segments every one with its cost.