N is the length of the city code and the subscriber number, including any formatting, such as spaces or hyphens. E is the length of the extension number. The following table shows an example calculation of the maximum length of an international phone number (+834 91 518–400 x 123).

Toll-free international number: These telephone numbers typically cost between $10 and $25 per month, depending on the country and provider. Virtual phone system: A virtual phone system that includes international telephone numbers and call forwarding typically costs between $10 and $50 per month, depending on the provider and features included.

Regex Javascript Phone number validation min max length check. 0. Regex phone validation. 1. Regex for phone number validation with min and max length check. 1.
As kabuko said there are a lot of variables. But I did testing on a Galaxy S5 and a Nexus 5, with Android 4.4, and got similar results. If you are looking for ballpark figures I got
1. International access. 011. List of dialing codes. The North American Numbering Plan ( NANP) is a telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1 and has the telephone country code 1. Some North American countries, most notably . 472 329 398 141 49 202 434 132

max phone number length in world