# ANI/DNIS/ISDN US Sprint ANI/DNIS Protocol

US Sprint transmits both ANI and DNIS numbers in the following format: *ANI digits*DNIS digits*

- Where the ANI digits can be no digits (ANI unavailable), the 3-digit Number Plan Area number, or the 3-digit Numbering Plan Area number and the 7-digit origination number

- Where the DNIS digits can be from zero to ten digits in length (see US Sprint ANI/DNIS Delivery Protocol).

For example, in **6135922122**7035551212 6135922122 are the ANI digits, and 7035551212 are the DNIS digits.