Q.  Is this NPA/NXX currently valid?

A.  To determine if a current NPA/NXX is valid, please use our online V&H Lookup application located on our website.  This information is updated weekly and contains the complete listing of available data (e.g., VH coordinates, rate center name) for every current NPA/NXX in our database.

Q.  Why does your NPA/NXX information differ from my other source(s)?

A.  Tele-Tech's data is based on the industry standard sources. Tele-Tech's data concurs with the Traffic Routing Administration which is used as the industry standard.  There are many other sources of this same information that Tele-Tech does not recognize as industry standard.  While these other sources may provide data that differs from Tele-Tech's, we feel that strictly adhering to industry standard sources provides the most accurate and reliable data.

Tele-Tech has recently become aware of issues with cellular NPA/NXXs.  Specifically, prepaid cellular phones are assigned NPAs that, in some cases, are not valid according to the North American Numbering Plan Administrator (NANPA).  The FCC gave authority to NANPA to administer the assignment of NPAs (or area codes) to the telecommunications industry.  It appears that prepaid cellular phones are not consistently assigning numbers in accordance with NANPA's guidelines.  Tele-Tech is still investigating this issue; a Notification will be issued to all current NPA-NXX Trac (V&H) customers upon its resolution.

Q.  How can I determine if an NPA/NXX is a wireless exchange?

A.  Tele-Tech recently completed a project to create a Wireless Indicator field in our V&H Wire Center database.   Therefore you will need to subscribe to our V&H Wire Center database to receive this information.  This field, located in byte 247, contains a "1" for wireless exchanges, and "0" for landline exchanges.  Wireless exchanges can include pagers, cellular phones, and other wireless devices.

Q.  When do you remove previously active NPA/NXXs from your data?

A.  When our sources identify that an individual exchange has been deactivated (i.e., it is no longer a valid NPA/NXX), we delay the actual deletion from our database for 60 days.  This allows our customers that use the data for billing purposes to bill for delayed calls in their billing cycle.  The exchange is removed from our data 60 days after the effective deletion date as reported from our sources.