English 中文(简体)
International Telephone number max and min? [复制]
原标题:International phone number max and min? [duplicate]

What is the max and min digits for an international telephone number? (country code + area code + phone number)

最佳回答

, where the format of telephone numbers is standardized by ITU-T in the recommendation E.164, which specifies that the entire number should be 15 digits or shorter,

资料来源:

Also, check this other question on SO: What s the longest possible worldwide phone number I should consider in SQL varchar(length) for phone

问题回答

电话号码由国际电联-T在其建议E.164中加以标准化。 在建议中,他们说电话号码不应超过15位数。

因此,这取决于电话操作员和当地标准。

大多数经营者不允许你向超过16位数的人发送短信。 因此,你有16位数的限制。

电话号码误解的冰层摘要可在上阅读。

15 digits is maximum, refer this link https://en.wikipedia.org/wiki/E.164

虽然该标准涉及15位数上限,但使用Direct Inward Dial (DID) 。 私人电话交换(PBX)技术通常用于在组织内指定个人或部门,使电话号码超过15位数(注“1234”):

0049 (30) 123456789-1234

在我们的系统中,我们使用20位数的限制。

实际上,问题要求有“国际”电话号码,但提到了一些国家没有的区域代码。 在E.164,在撰写本报告时,国家部分不超过12位数。 之后,他们增加了一部国家法典,在预设处添加“+”。

然而,可能有更多的用户,我们知道,他们确实被分配到世界某些地区。 这方面的技术限制见3P标准(如GSM)和ISDN标准(如DSS1),这些标准有10个按字面编码的用户数,还有最多可分四位数的预设数。 这增加了24位数,以备用户数目。





相关问题
Is this a standard C++ code?

The following simple piece of code, compiles with VC2008 but g++ rejects the code: #include <iostream> class myclass { protected: void print() { std::cout << "myclass::print();"; } };...

What is the best practice for formatting logs?

I m writing a piece of honeypot software that will have extensive logging of interactions with it, I plan to log in plaintext .log files. I have two questions, from someone who isn t too familiar ...

Should I keep the package name when extending a class?

I plan to extend a JSF renderer. The package name is oracle.adfinternal.view.faces.renderkit.rich Should the extended class be in the same package structure: oracle.adfinternal.view.faces.renderkit....

Why doesnt Regex.Match have a GetEnumerator function?

Regex.Match has a .Success and .NextMatch why doesnt it have a GetEnumerator function? With my logic it seems easy enough to implement. But it isnt in 3.5 so can anyone tell me why not? foreach (...

How are you using C++11 today? [closed]

This is a question in two parts, the first is the most important and concerns now: Are you following the design and evolution of C++11? What blogs, newsgroups, committee papers, and other resources ...

subexpressions evaluation order

I ve looked at SO/IEC 9899:201x under J.1 Unspecified behavior: "The order in which subexpressions are evaluated and the order in which side effects take place, except as specified for the function-...

Lower Bounds For Floating Points

Are there any lower bounds for floating point types in C? Like there are lower bounds for integral types (int being at least 16 bits)?

热门标签