NALENND™

The Gold Edition is a basic geocoded telephone Area Code and Exchange database. It contains all active NPA NXX listings for the United States, Canada, and most of the Caribbean. Telephone exchange details are at the 1,000-block level.

The coverage area for an exchange is identified by its serving Wire Center. The line type for an NPA NXX is the original LERG™ assignee's, CO code holder's, or block holder's reported use. United States CBSA, MSA, and PMSA codes are included and are "tied" to the NPA NXX based on the exchange's "Rate Center".

The included geographic latitude and longitude coordinates specify the approximate center of the area served by the telephone exchange. These are generalized coordinates for basic area location only.

NPA NXX Gold Edition Database Fields

NPA NXX master file		NPA NXX data samples
Field Name	Data Type	Description
NPA	NUMBER (3)	Three-digit Numbering Plan Area code.
NXX	NUMBER (3)	Three-digit Central Office Code (COC), i.e. telephone exchange number.
BLOCK_ID	CHAR (1)	Single character thousands-block identifier.
TBP_IND	CHAR (1)	Thousands-block pooling indicator.
LATA	NUMBER (5)	3 or 5-digit number that represents the geographical Local Access and Transport Area (LATA) for the NPA NXX. This value is the LATA associated with the exchange's rate center and represents the predefined boundary for local toll calls.
LTYPE	CHAR (1)	Single character alphanumeric value identifying the basic line type of the NPA NXX.
STATE	CHAR (2)	Two-character state or province abbreviation of the exchange's rate center location. These are standard postal abbreviations which differ from the same COMMON LANGUAGE® assignments.
COUNTRY	CHAR (2)	Two-character ISO 3166-1 Country Code of the exchange's rate center country location.
WC	VARCHAR (255)	Name of wire center (city, town, or location) serving the exchange.
SWITCH	CHAR (11)	Eleven character Common Language Location Identifier® (CLLI) code of the wire center switch serving the telephone exchange. This field is generally present for all entries but may be empty for certain Caribbean NPA NXX entries. For NXXs in the Caribbean and Bermuda NPAs, the SWITCH field may be populated with SWCHxxUNKNO, where xx identifies one of the countries or territories in the Caribbean or Bermuda.
ZIP	MEMO	United States - contains the first five-digit ZIP code found for the exchange locality within the rate center. This field is not intended to provide comprehensive ZIP to NPA NXX cross-reference. Canada - contains all Forward Sortation Area codes for the exchange within the rate center. This is a comprehensive list of FSA codes for the exchange and can be large for certain locations. Multiple values within this field are semi-colon separated.
FIPS	NUMBER (5)	Five-digit United States Federal Information Processing System (FIPS) County Code identifying the county (or primary county) the exchange's rate center is located in. This value is the concatenation of the two-digit FIPS state code and the three-digit county code.
CBSA		Five-digit Core Based Statistical Area Code of the Metropolitan or Micropolitan Statistical Area the exchange's rate center is located in. This field may contain multiple CBSA codes for a particular rate center. When multiple codes are present they are semi-colon separated. CBSA codes are defined by the Office of Management and Budget and supersede previous MSA codes and definitions.
MSA	NUMBER (4)	Four-digit code of the Metropolitan Statistical Area (MSA) the rate center is located in if any. This field is maintained historical for cross-reference.
PMSA	NUMBER (4)	Four-digit code of the Primary Metropolitan Statistical Area (PMSA) the rate center is located in if any. If a PMSA code is present then the MSA code is recognized as a Consolidated Metropolitan Statistical Area (CMSA) code. This field is maintained for historical cross-reference.
LATITUDE	DOUBLE	Latitude in decimal degrees of the general exchange location.
LONGITUDE	DOUBLE	Longitude in decimal degrees of the general exchange location.
OCN_CATEGORY	CHAR (1)	Single character field identifying the general company/carrier "type" of the OCN.
OCN	CHAR (4)	Four-character alphanumeric field identifying the NPA-NXX code-holder and/or service provider.
OVERALL_OCN	CHAR (4)	Four-character alphanumeric field identifying the Overall Company Code as assigned by the National Exchange Carriers Association (NECA) of the OCN. Not all OCNs will have "Overall" Company Codes.
DERIVED_FROM_NPA	VARCHAR (20)	Indicates the previous NPA that existed in the area covered by a given NPA. In cases of overlays, some or all of the previous NPAs may still cover the area. The OVERLAY field should be referenced to determine how to interpret this field.
NEWNPA	NUMBER (3)	Specifies the new area code to be used with the NXX or new area code(s) created in the same coverage area as the current area code. The OVERLAY field should be referenced to determine how to interpret this field.
OVERLAY	CHAR (1)	Single character field to determine how the DERIVED_FROM_NPA and NEWNPA fields should be interpreted.
County data file		FIPS code data samples
Field Name	Data Type	Description
FIPS	CHAR (5)	Five-digit Federal Information Processing System (FIPS) county code. This field is actually the concatenation of the two digit FIPS state code and the three-digit FIPS county code.
COUNTY	VARCHAR (32)	County or entity name
STATE	CHAR (2)	Two character state or territory abbreviation
COUNTY_TYPE	CHAR (1)	Single character county type code
COUNTY_SEAT	VARCHAR (32)	Name of county government center
NAME_TYPE	CHAR (1)	County or entity type described by county name
LATA Assignments		LATA data samples
Field Name	Data Type	Description
LATA	NUMBER (5)	The Local Access Transport Area code.
STATE	CHAR (2)	Two character state, province, or territory abbreviation of the NPA/NXX Service Center location.
COUNTRY	CHAR (2)	This two character field is the ISO 3166 Country Code for LATA location
LOCATION	VARCHAR (64)	Generalized name defining the LATA location
NECA OCN Assignments		NECA OCN data samples
Field Name	Data Type	Description
OCN	CHAR (4)	Four character Operating Company Number assigned by the National Exchange Carrier Association (NECA) for the telephone company servicing the exchange.
TYPE	VARCHAR (8)	Type of carrier or service provider
COMPANY	VARCHAR (128)	The legal or generally formal name of the service provider.
DBA	VARCHAR (128)	The commonly recognized business name of the service provider.
OMB CBSA Assignments		CBSA data samples
Field Name	Data Type	Description
CBSA	NUMBER (5)	Five-digit code assigned by the Office of Management and Budget to the Core Based Statistical Area.
CSA	NUMBER (3)	Three-digit Combined Statistical Area code if the CBSA is part of a larger statistical area.
AREA_NAME	VARCHAR (64)	Official name of the MSA, PMSA or CMSA.
STATE	VARCHAR (20)	Abbreviated state(s) postal code where the CBSA is generally located.
AREA_TYPE	VARCHAR (64)	Specifies whether the area is a Metropolitan or Micropolitan type area.
OMB MSA-PMSA Assignments		MSA-PMSA data samples
Field Name	Data Type	Description
MSA	NUMBER (4)	4-digit code assigned by the Office of Management and Budget to the MSA or PMSA code.
TYPE	VARCHAR (8)	Identifies whether the code is an MSA (Metropolitan Statistical Area), PMSA (Primary Metropolitan Statistical Area), or CMSA (Consolidated Metropolitan Statistical Area).
NAME	VARCHAR (128)	Official name of the MSA, PMSA or CMSA.
CMSA	NUMBER (2)	2-digit code to identify the CMSA.
POPULATION	NUMBER	Estimated year 2000 population

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