How I Know The IP Adresse of The Computer from which I recieve the sms to my mobil.?

Answer 1

I dont think you would be able to find that information.

Answer 2

Read the following, you might get some idea.

2.3At level 3 : telecommunication application or service level (E-mail, ICQ, SMS etc.)
The services offered at this level are numerous and very different one from another.
Although there is no agreement if and for which of these services traffic data should be considered
as vital, the members of the EWPITC see a need to qualify following services as significant and
ask thus for those to retain the traffic data :
e-mail
SMS gateways
Website publishing (website or announcements on websites)
newsgroups
2.3.1Proxy servers
If Internet users perform their web activities through a proxy of cache server, the only IP-address
that the visited website can register is that of the proxy server.
The website cannot differentiate any of the users coming via the same proxy server.
The providers of this proxy service have to be able to link the used web service further on to the
real end user.
IP end user
IP proxy server
IP requested server
Date and time of the request
2.3.2E-mail
E-mail address sender
E-mail address receiver(s) (also ‘CC’ and ‘BCC’)
Message ID
Mail-size
Type of service / communication protocol (SMTP)
IP-address of the sender
2.3.3SMS gateway
IP-address of the user filling in the SMS message
Date and time of when the message was received on the website of the
gateway
Called GSM number
GSM number of the SMS gateway
Date and time of passing the message to the GSM SMS service