Pseudo ANI is best described as which of the following?

• A. A term used to describe caller location data
• B. An acronym for a phase in wireless 911
• C. Generic term often used in lieu of ESRK and ESRD
• D. A method of routing landline calls only

Answer: (C)

Pseudo ANI is a stand-in number used for routing 9-1-1 calls; it’s a generic term people use to refer to substitute ANIs when the exact routing fields aren’t in use. In PSAP systems, ESRK (Emergency Service Routing Key) and ESRD (Emergency Service Routing Digits) are the specific routing elements, so the term Pseudo ANI serves as a broad label that can cover those scenarios without committing to a particular field. This makes it the best choice, because it captures the idea of a substitute identifier used for routing rather than the caller’s real number. It isn’t about caller location data, isn’t a phase in wireless 911, and isn’t limited to landline routing.