• IP addresses are NOT logged in this forum so there's no point asking. Please note that this forum is full of homophobes, racists, lunatics, schizophrenics & absolute nut jobs with a smattering of geniuses, Chinese chauvinists, Moderate Muslims and last but not least a couple of "know-it-alls" constantly sprouting their dubious wisdom. If you believe that content generated by unsavory characters might cause you offense PLEASE LEAVE NOW! Sammyboy Admin and Staff are not responsible for your hurt feelings should you choose to read any of the content here.

    The OTHER forum is HERE so please stop asking.

Serious How Scammers Use Local and Trusted Numbers, including alphanumeric names, to Trick you!!

thinkorsink

Alfrescian
Loyal
https://www.callersmart.com/article...rs-use-local-and-trusted-numbers-to-trick-you

spam sms, no number, just name:

They’ve set the originator field to alphanumeric. Among other things, this means it wasn’t sent directly from a cellular device (from where the sender number can’t be modified).

The originator field is 10 bytes maximum for content. When set to alphanumeric, the 7-bit SMS default alphabet is used, limiting the address to 11 characters (10 * 8 / 7 as an integer).

While an Australian mobile number in national format (like 0412345678) will fit as alphanumeric, it won’t when in international format (like +61412345678).

Left as numeric, 20 BCD digits will fit into 10 bytes.

It makes sense for a device to not block specific alphanumeric addresses, because there’s no requirement for them to be unique.

https://en.wikipedia.org/wiki/SMS_spoofing
 
Top