NALENND™

Wireless Block Identifier

Current Release: March 3, 2010

The NALENND™ Wireless Block Identifier file identifies all Area Codes and Exchanges within the United States, Canada, and the Caribbean at the thousands block level and whether the block is a land line or wireless assignment.

This data is well suited for any application wishing to identify initial landline-wireless assignments. It is updated monthly covering approximately 1,409,108 blocks representing some 1,400 million plus phone numbers that are currently active or will be active within 60 days.

Wireless Block Identifier Record Layout

Field	Data Type	Field Description
NPA	CHAR (3)	The 3-Digit area code.
NXX	CHAR (3)	The 3-digit exchange prefix.
BLOCK	CHAR (1)	Single digit thousands block identifier representing the first digit of the 4-digit station number.
BLOCKTYPE	CHAR (1)	Single character block type identifier.
RESERVED	VARCHAR (128)	Reserved for future use.

Corporate License
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