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NAICS Desk Reference: The North American Industry Classification Systems Desk Reference. Indianapolis: JISTWork, Inc. 2000. ISBN 1-56370-694-6. Vogel, Scott M. (2001). Harris' Complete Guide to NAICS: Your Ultimate Reference to NAICS, SIC & ISIC Codes. Twinsburg, Ohio: Harris InfoSource. ISBN 1-55600-922-4.
NAICS replaced the four-digit SIC code with a six-digit code, and it provided more flexibility in handling emerging industries (for example, the NAICS system more generally allows for "Other..." categories across industry groups). The new codes were implemented in Canada and the United States in 1997 and in Mexico one year later.
The values for NAICS codes beginning with 11 are summarized below. [1]11 Agriculture, Forestry, Fishing and Hunting 111 Crop Production 1111 Oilseed and Grain Farming 1112 Vegetable and Melon Farming
5-Digit Class-Item Code The 5-Digit class-item Code is an expanded version of the 3-Digit class Code. Currently, it contains over 8,700 descriptions. Currently, it contains over 8,700 descriptions. This level categorizes vendors by class-item to allow your procurement software to automate bidder selection, produce no-bid response reports ...
The RespOrg is not the carrier. A Canadian carrier could be used for Canadian calls and a U.S. carrier for American calls; a user with many inbound local voice over IP numbers in multiple cities could convert toll-free calls on one main toll-free number to local calls in each city where it has a point of presence. Percentage Allocation routing
Each NPA is identified by one or more numbering plan area codes (NPA codes, or area codes), consisting of three digits that are prefixed to each local telephone number having seven digits. A numbering plan area with multiple area codes is called an overlay. Area codes are also assigned for non-geographic purposes.
411 LDA: Local Directory Assistance. 411 is dialed, and the operator is requested to search for a listing in a group of area codes local to the caller . Example: the caller lives in area code 630 (Oak Brook, Illinois) and requests a listing for a business in area code 312 (Chicago, Illinois). In this case, AT&T Illinois bills the call.
The ten-digit telephone numbers of the North American Numbering Plan consist of a three-digit numbering plan area code (NPA code), written as the most-significant part of the national telephone number, followed by the three-digit central office code, and the four-digit local line or station number. From 1947 to 1995, all NPA codes were ...