11. The new numbering plan area ( NPA ) entered service on October 11, 1993. 12. A broad division is commonly recognized, distinguishing open numbering plans and closed numbering plans . 13. The telephone numbering plan for the country is known as the National Numbering Plan . 14. The numbering plan area retains its original boundaries, having never been split or overlaid. 15. And Dionysius Exiguus'year-numbering plan took centuries to win widespread acceptance. 16. The Alaska numbering plan area ( NPA ) was assigned the area code 907. 17. In this sense, too, the numbering plan betrays a desire to expand ministerial interests. 18. Spain changed to a closed telephone numbering plan in 1998. 19. Russia has an open numbering plan with 10-digit phone numbers. 20. A broad division is commonly recognized, distinguishing open numbering plans and closed numbering plans.
