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SS7/Telephone Network Lookups
There is one piece of information that is only obtainable from the national telephone network itself.
Only it can tell you if a phone number is active and connected with 5 minute accuracy levels.
Directory Assistance (DA/411) repositories are updated every 24 hours. Compiled/Whitepage based
repositories are typically updated every month. But if you need to know that a phone number is active
right now, you have to be able to ask the phone network itself. This is done using what the telephone
service industry calls the SS7 Network.
SS7 is a network of computer systems and databases the phone system uses itself to figure out how to
map a phone call from one point on the network to any other point. The data, including the status of
every phone number, on the SS7 network is updated every 5 minutes. PacificEast provides a simple XML
transaction, called FullStatus, that gives you access into this powerful information network.
FullStatus – Starting from a full 10-digit phone number FullStatus returns a telco-sourced name
and address as well as these 4 fields:
- Phone ServiceType – what type of phone is associated to that number (landline, cell, etc.)
- Status – The status of the line (active, inactive, etc.)
- PortingStatus – whether the phone number has been ported
- CarrierGroup – the telephone company serving that phone line
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