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Frequently Asked Questions About FAQ Frequently Asked Questions Wireless Block Identifier – FAQ’s What is the Wireless Block Identifier® file? The Wireless Block Identifier® file identifies the area codes and exchanges, or blocks of numbers initially assigned to wireless carriers active within the U.S. and Canada. How often is the Wireless Block Identifier® file updated? The Wireless Block Identifier® file is updated twice a month for download around the 10th and 24th each month. How many blocks of telephone numbers are in the Wireless Block Identifier® file? The Wireless Block Identifier® file contains over 750,000 blocks representing approximately 750 million phone numbers that are currently assigned or will be assigned to wireless telephones. How many fields are in the Wireless Block Identifier® file? There are five fields in the Wireless Block Identifier® file and are labeled: – NPS (area code) – NXX (exchange) – X (1st digit of the remaining number – the block of 1,000 numbers) – Category (all listed categories are wireless numbers) – Future Use (reserved for future use) Is the Wireless Block Identifier® file the only file I need to identify all wireless telephones? To correctly identify all wireless telephone numbers, organizations must use the Wireless Block Identifier® file and the Wireless Ported Number file together. Wireless Ported Number – FAQ’s What is the Wireless Ported Number file? The Wireless Ported Number zip file contains one file of telephone numbers that were originally landlines and ported to wireless and one file of telephone numbers that were originally wireless and ported to landlines. How often is the Wireless Ported Number file updated? The Wireless Ported Number file updated is updated daily. What is updated daily in the Wireless Ported Number file? Each day a full replacement of the Wireless Ported Number file will be posted. This file will contain all the wireless ported numbers to date. Why should I buy the Wireless Ported Number file