SMS request a reply??

[usc2424]

Hello,

I'm new to this and this may be a newbee ? but I'm hoping someone can help.

I would like to know how this works.
Example: text "prize" to 426315.

My web application receives the request and reads the word "prize", then sends the user back a text message with information on how to claim the prize.

I just want to know where the example number 426315 comes from. Is this assigned by the phone carrier?

Hope that make sense.

Thanks

[petrib]

The SMS short codes are usually assigned by a local (country) regulator (ministry of telecommunications, or such) and/or incumbent network operator (carrier) depending on the country/location:
http://en.wikipedia.org/wiki/Short_code

[usc2424]

Thanks for the information, it is alot of help.

[neil.bellamy]

This can also be done by use of a shared short code.

eg Text TEST to 64446

64446 receives the message and forwards it to the owner of the keyword TEST.

This is much cheaper and easier than buying a short code.