Talk:North American Numbering Plan
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- in the form N-Y-X, where N is any number 2-9, Y is 0 or 1, and X is any number 0-9.
This book I am reading, although not specifically on this topic, states something akin to:
- in the form N-Y-X, where N is any number 2-9, Y is 0 or 1, and X is any number 1-9.
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You are correct, to my surprise. (I have changed the entry) Oddly, while all official sources I can find say the original area code pattern allowed a final 0, none of the 86 actually ended with a 0 - they all ended with 1 through 9.
DavidWBrooks 15:40 20 May 2003 (UTC)
curious...Pizza Puzzle
I've heard that Tommy Tutone's "Jenny (876-5309)" was the inspiration behind the 555 exchange. Anyone know if this is true? When did it begin? (the song is from circa '80 or '81, I think)Tuf-Kat
National Public Radio did something on this a few days ago and they dated it back to when there were still letters instead of just all numbers -- movies were using KLondike 5 before they switched to 555. It was in teh 50s. -- Zoe
- You can listen to the report at http://discover.npr.org/features/feature.jhtml?wfId=1280819 -- Zoe
I'm a pedant, so I have to point this out:
- The plans being considered now add a 1 or 0 to the end of the area code or the beginning of the local 7-digit number (or both), which will require mandatory 10-digit dialing....
If the scenario of the sentence actually happened, it would then become 11-digit dialing. (And 12 digits with a '1' prefix.)
oh, and.
Such a shift will likely increase the potential confusion in telephone record processing systems between non-prefixed NANPA numbers and international numbers. Especially since that even today, individuals in non-metropolitan areas can still get away with seven digit dialing, even though nearly every single urban area now requires ten digit. Undoubtedly this problem of legacity will (despite any current insistences) apply to the extra-digit shift; in other words, smaller communities will likewise resist being forced to dial 11 digits just because the big cities are getting too crowded.
Which means processing systems will need to recognize 10-digit and 11-digit numbers in "national" TON at the same time.
This also means that any confusion with country-code prefixed international numbers we may have today (with countries where CC+national number == 10) will amplify (to include countries where CC+national number == 11).
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Area code expansion
I reworked much of the text discussing the history of area code expansion, and better defining "splits" and "overlays", giving some examples of each.
However, this could probably use some editting to tighten it up a bit.
Kaszeta 13:35, 18 Aug 2004 (UTC)
KeithTyler revert 15 May
Just wondering why my edit is irrelevant while the original mention of '999' can stay...
I thought that 112 was the emergency number for the whole of Europe (plus GSM networks) but if that is incorrect then no problems.
It IS correct, as it stems from an EU directive. The number 112 is used alongside existing emergency numbers, such as 999 in the UK. It is also the worldwide GSM emergency number; again, alongside local numbers. (It is an EU requirement that emergency numbers be dialable on a GSM phone even when the keypad is locked; some only accept the sequence 1-1-2 and others accept that plus all national emergency numbers.)
Likewise, 00 is the international calling code in all EU countries as the result of a directive; Britain switched in 1995, for example. (FWIW, Bill Bryson, in one of his books, ridicules the EU for proposing a "country code" of 00 and failing to implement it, where in fact he was confusing a country code with the IDD code, which all EU countries had already implemented.)
Most other (non-EU) European countries have also adopted both 00 and 112, although this is not true of all the former USSR.
KeithTyler's reversion might make sense inasmuch as the text didn't have that much to do with the NANP, but it was factually correct.
--ProhibitOnions 22:10, 2005 May 30 (UTC)
dialing
how does the us system tell the difference between a local call and theese codes? is a prefix needed and if so why isn't it listed here? Plugwash 13:03, 23 May 2005 (UTC)
Generally, since NANP numbers are of the form +1-NXX-NXX-XXXX, dialing the leading "1" notes a long-distance call. However, from what I understand, there are a number of exceptions to the rule. I do know that if someone in North America wishes to call outside the NANP area, "011" must preceed the country code in order to denote that the call is going outside the NANP. Mhking 17:45, 14 Jun 2005 (UTC)
- Plugwash, I'm not sure what you mean by "these codes". If you mean 911, 411, and so on, numbers of the form n11, where n is 2 to 9, are reserved and cannot be used as area codes or office codes (the first 3 digits of a 7-digit number). When the equipment sees "11" as the 2nd and 3rd digits dialled, it knows that's the end of the number and connects the call.
- If you're wondering how the equipment tells between a 7-digit number and a 10-digit number, it's done differently in different areas. In some areas, 10-digit dialling is required, so there's no problem. In other areas, a prefix is required: 0 or 1 has to prefix a 10-digit number; if the first number dialled is 2 to 9, the equipment expects a 7-digit number (unless of course it's an n11 number). What the "0" and "1" prefixes mean differs by area too. Indefatigable 22:06, 14 Jun 2005 (UTC)
Long-distance prefix other than 1?
Another thing, the long-distance prefix hasn't always been 1. I remember in Lincoln, Nebraska (a GTE area) in the early 1980s it was something else, like 122. Can anyone confirm this? --ProhibitOnions 11:17, 2005 Jun 15 (UTC)
Cuba?
Does anyone know whether Cuban participation in the NANP was foreseen? It had (and has) a US-built telephone system and would have been an obvious candidate, prior to 1958. --ProhibitOnions 11:32, 2005 Jun 15 (UTC)