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Note that when you write an IP address in the form a.b.c, the c is actually allowed to be 16 bits. E.g., 192.168.2345, which is equivalent to 192.168.9.41.

Note also that telephone numbers in the US can be written in the form a.b.c, where a and b are 3 digits and c is four digits.

It would be really cool to get a matching telephone number and IP address, so you could print on your business card something like "Telephone and IP: 206.253.2317".




Well the IP is global, but the number you provided is ambiguous. Egypt's country code is 20, following 62 is Suez[1]. Search for "+20 62" and you'll see 10 digit numbers that would ring in Egypt instead of Seattle.

As a side note/tip: Most phones these days (well, Android, iPhone, and Skype) accept the + for fully formatted numbers[2]. It makes it handy if you travel and want your stored contacts to work regardless of phone network.

1: http://en.wikipedia.org/wiki/Telephone_numbers_in_Egypt

2: http://en.wikipedia.org/wiki/E.164


Isn't "+xxx" been used in GSM phones for the last decade?


It's been even longer than that. If you look at most mobile phones with real key pads there will be a + on the 0 key. You hold 0 to dial the +.


It's only ambiguous if you ignore how the numbers are separated. It's also probably obvious from context whether or not it's a US telephone number.




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