Telecom Experts
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Telecom Experts

What is AT&T doing at 1111340002?

Welcome to the magical world of proactive SIMs.

An AT&T SIM from 2015

From time to time, an attorney will request cellphone activity records from a mobile operator, and those records will show some text messages to and from strange numbers. There is a good chance that the person who uses the phone never sent or saw these messages. And if this happens in the middle of a legal case where cellphone…




This a source for background information on the operation of the global telecommunications network, how it works inside, and some of the security risks associated with it. It is particularly oriented toward to journalistic, legal, and international aid communities.

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David Allen Burgess

David Allen Burgess

I have worked in telecom since 1998, in both SIGINT and in commercial equipment. I also do expert work in legal cases, see

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