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Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC). NPAs with 9 in the second position are reserved for future format expansion.
The largest telephone numbering plan in North American is the North American Numbering Plan (NANP), serving 25 regions or countries. Other countries maintain an autonomous numbering plan with distinct country codes within the international E.164 specifications by the International Telecommunication Union.
Area codes in Arizona (6 P) Area codes in Arkansas (4 P) C. Area codes in California (25 P) Area codes in Colorado (4 P) Area codes in Connecticut (3 P) D.
Minnesota was divided into a south-eastern area including the Twin-Cities with area code 612 and the rest of the state in the south-west, north, and north-east with area code 218. [2] In 1954, the southern half of 612 was designated a separate numbering plan area with area code 507 as the third area code for the state.
The total area of the national forest is 141,864 acres (221.663 sq mi; 574.10 km 2). The forest is managed by the U.S. Forest Service's Nebraska Forests and Grasslands Supervisor's Office in Chadron, Nebraska. The national forest includes two ranger districts, the Bessey Ranger District and the Pine Ridge Ranger District.
The R&D organization has been part of the USFS mission since the agency was created in 1905. [6] As one of seven units in the USFS R&D organization, the Southern Research Station had its beginnings as two separate entities – the Southern Forest Experiment Station and the Southeastern Forest Experiment Station. [7]
Further, the Forest Service fought fires on 2.996 million acres (12,120 km 2) of land in 2007. [15] The Forest Service organization includes ranger districts, national forests, regions, research stations and research work units and the Northeastern Area Office for State and Private Forestry. Each level has responsibility for a variety of functions.
The U.S. Forest Service banned motorized travel on 186 miles (299 km) of trails in 2009. [13] In January 2011, a federal district judge cleared the roadblock on the U.S. Forest Service's Badger-Two Medicine travel plan. The plan allows motorized access on 8 miles (13 km) of established trails and bans all snowmobile travel. [14] [11]