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What is an IMSI (International Mobile Number Subscriber Identity)?

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What is an IMSI (International Mobile Number Subscriber Identity)?

The International Mobile Subscriber Identity (IMSI) is a unique id associated with all GSM and UMTS network mobile phone users. It is coded as a 13 to 15 digit long field on the SIM-Card inside the phone.
The first three digits represent the Moble Country Code (MCC), which is followed by the Mobile Network Code (MNC) with either 3 digits (North American standard) or 2 digits (European standard). The remaining digits represent the Mobile Subscription Identification Number (MSIN) within the mobile operator's customer base.
You can lookup the IMSI of a particular number by using the HLR lookup function of the My-Cool-SMS API.

Knows Unicode and long SMS

Sends SMS messages in any language in the world. Combines long messages into one single SMS with up to 765 characters (or 335 for Unicode).

Receives SMS texts

Implements Sender ID and receives SMS on your own My-Cool-SMS virtual number. Forwards inbound SMS to mobiles, email and web servers.

Connects to your system via API

Provides programming tools to send and receive SMS text messages and maintain your mobile marketing databases. Integrates with any web application and and e-commerce system.
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