@JJ_McCullough | 56,285 followers
I just learned that the only reason phone numbers have hyphens is because that makes them easier to remember. They have no technical significance.

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Total of 11 replies and 3 quotes found
Uh. Since there’s no hyphen on a dial (or keypad) that seems self evident, no?

Same thing with the spaces between each 3/4 digit block on credit cards.
In reply to @JJ_McCullough
yep! and why 7 numbers? "Countless psychological experiments have shown that, on average, the longest sequence a normal person can recall on the fly contains about seven items. " abcnews.go.com/amp/Technology…
In reply to @JJ_McCullough
Sure, kind of. But also, no, not really. Back in the day - the area code would get you into the correct interconnecting office. The prefix would get you into the local central office. The number - was your number. That's the line you had at the local central office
You don’t have any technical significance either.
In reply to @JJ_McCullough
The leader of the opposition’s preferred interviewer, folks.
In reply to @JJ_McCullough
Not true. The first three numbers of the seven were the exchange. Watch an old time movie, the exchange name was even used back then.
In reply to @JJ_McCullough
No. They do have significance. However, that can vary by region. In North America the first 3 digits represent an area code. The next 3 are a further subdivision and the last 4 are an identifying number. However, this has become more complex with VoIP, etc.
In reply to @JJ_McCullough
The fact that a tweet like this has generated even a mild amount of controversy is why everyone both loves and hates Twitter.
In reply to @JJ_McCullough
It’s also not a worldwide thing, didn’t do that in India
In reply to @JJ_McCullough
you have...never...used a phone? I mean. Not a cellphone. Wait. what. How old are you? pic.twitter.com/8dQj6QWStL


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