ANI, CallerID, Spoofing
I founded a great article about some usefull definition that could help undertanding what spoofing is about
So, just what is ANI?
ANI stands for Automatic Number Identification. ANI is a service feature that transmits a directory number or Billing Telephone Number(BTN) to be obtained automatically. In other words your number is sent directly to wherever you are calling to automatically. Unlike Caller ID you can not block this feature from happening.
What is flex ANI?
Flexible ANI provides “II”(identification indicator) digits that identify the class of service of the phone you are calling from.
What is CPN?
Calling Party Number, the number used for your caller ID.
What are ANI “II” digits?
Identification Indicator digits describe the class of service of the telephone.
Some examples are:
00 "POTS"(plain old telephone service) or home phone 07 Restricted line 27 ACTS payphone 29 Prison phones 62 Cellular phones 70 Cocot Payphone
What is an ANAC?
ANAC stands for Automatic Number Anouncement Circuit. This is a phone number you can call that will ring into a circuit that anounces the ANI or CPN number you are calling from. An example of an ANAC is 800-555-1140 and 800-555-1180. When you call this number you will get an ARU(Audio Response Unit) this is the circuit that anounces your ANI/CPN. When you call 800-555-1140 or 800-555-1180 the ARU will give you this information: “The ARU ID is [id], Your line number is [trunk number], the DNIS is [DNIS number] the ANI is [II digits followed by CPN, even though the recording claims to be reading ANI]”
(These ANACs don’t work anymore, try 800-444-4444)
ARU ID: Audio Response Unit ID number, this identifies which ARU in a group of ARUs you reached.
Line number: The trunk you came in on.
DNIS: Dialed Number Identification Service — Tells you which number YOU called.(i.e. 800-555-1140 is 03123, 800-555-1180 is 03125)
ANI: II digits followed by ANI.
What is a BTN(Billing telephone number)?
BTN is a phone number for which charges are to be billed to. It is not necessarily the phone number of the line you are calling from.
What is Psuedo ANI?
Psuedo ANI or PANI is a unique non-dialable number used to route cellular calls. PANI is used by 911 operators to find the cell site and sector from which the cellphone is calling.
What is an ANI fail?
An ANI fail is when no ANI is sent. Usually the areacode of the tandem office completing the call will be sent.(i.e. if the tandem office is in 213 the ANI will be sent as 213-000-0000.)
How do ANI fails occur?
ANI fails can occur when the tandem office completing a call didn’t receive ANI from the central office originating the call. ANI fails can also be caused when ANI is intentionally not sent, this can happen by using a method called op diverting. Another way you can cause ANI fails is through the use of the AT&T long distance network. Simply dial 10-10-288-0 or dial 0 and ask your operator for AT&T. When AT&T comes on the line simply touch tone in a toll free number and the call will be completed with no ANI. Note however that this method is dependent on the AT&T center you reach, some AT&T centers still forward ANI, others send an AT&T BTN as ANI, but most AT&T centers currently don’t forward ANI.
What is op diverting?
Op diverting is a term that describes the process of intentionally causing an ANI fail by having your local operator dial the number you wish to reach. Most operator centers are not equipped to forward ANI and so they complete the call with no ANI.
What’s the difference between ANI and Caller ID?
ANI is the BTN associated with the telephone and is the direct number from where you are calling from. Caller ID is usually the BTN but occasionally can be incorrect, i.e. the main number of a business instead of the actual number being called from. Another difference in ANI is that it shows the class of service of the phone number while Caller ID just shows the name and number.
Now that you have an idea of what ANI is and how it differs from Caller ID I will explain some methods for spoofing both of them.
Source :
http://www.docdroppers.org/wiki/index.php?title=ANI_and_Caller_ID_Spoofing
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