Talk:N11 code

"Only non-geographic area codes, such as toll-free 800/888/877/866/855 numbers and 900 numbers may use N11 as the telephone exchange prefix, since the area code must always be dialled for these numbers." seems wrong to me. In the 617 area code, you nominally have to dial 617 before any call to a 617 number, because there's an overlay area code, and the telco decided that in order to prevent the people in the overlay area code from feeling like second class citizens who had longer phone numbers, we had to treat everyone as second class citizens. However, for a good while after Verizon demanded 10 digit dialling from landlines, my cell phone accepted 7 digit dialling, and some PBXes in 617 may still allow 7 digit dialling. JNW2 17:00, 17 October 2007 (UTC)

Apparently the +1-areacode-x-1-1 prefixes are still reserved even in the areas where the Federal Communications Commission or Canadian Radiotelevision and Telecommunication Commission have unnecessarily inflicted 10-digit dialling for calls within the same area code - something which never had a technical need to exist anywhere. Voice over Internet and PBX installations may differ, in that some of the dialplan handling is done by customer-owned equipment where it's safely out of the telco's reach. So a call to the CRTC's offices in Hull, Québec might be seven digits from a VoIP 'phone in Kingston or Belleville but inexplicably undiallable as seven digits from a phone booth directly in front of the CRTC building, les Terrasses de la Chaudière in Hull. --66.102.80.212 (talk) 06:10, 18 November 2007 (UTC)

Missing information

This article should explain how these codes originated (as 11N in step-by-step exchanges, and N11 only in panel and crossbar exchanges), and in particular the use of 112/211 for the long-distance operator and later direct-dial long distance before that service became simply 0+/1+. 18.26.0.5 (talk) 21:38, 5 August 2009 (UTC)

I agree - Some historical background would benefit the article. 411 for information in common-control systems (crossbar, panel, etc.) goes right back to the 1920's, and 611 was also established fairly early on as telephone repair service in many areas. Many SxS areas adopted 113 & 114 respectively for these services.

Areas with N11 service codes typically used 211 for the long-distance operator, where traffic was high enough to warrant providing a separate code instead of just having callers dial 0. SxS areas using 11X codes most often used 110 for reaching the long-distance operator.

112 was widely adopted in SxS switches as the DDD prefix, since it was easy to provide access to the tandem trunks from the existing 11x selectors. Later on, double-headed trunk arrangements permitted the use of 1+ DDD dialing in place of 112+ while retaining 11X service codes, some of which were not changed over to N11 codes until the 1980's.

Many other N11 and 11X codes were used for varying functions over time, some published, others intended for telco use only. For example, in many SxS areas serving rural party lines, 119 followed by some other combination of digits was used to make a revertive call to somebody on your own line. "Odd" N11 codes, e.g. 711, were sometimes used for telco functions such a reaching a dial-speed test system, or other test facilities. There was never any set standard for these though.

There was at least one metro area which used two or three of the "higher" N11 codes, including 911, for reaching operators for short-haul toll calls to relatively nearby towns. That was years before the adoption of 911 as the emergency number, of course. 91.125.127.20 (talk) 22:01, 4 October 2012 (UTC)

External links modified

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Unlinked link

@Kbrose: You reverted my formatting a link as a link. Is there a reason you think that a URL in the "External links" section of this article shouldn't be formatted as clickable link? —me_and 10:16, 6 February 2018 (UTC)

I think I must have meant to remove it. Kbrose (talk) 16:17, 6 February 2018 (UTC)