NRF (No Record Found)
NRF (No Record Found) is generated when a wire-line 9-1-1 call is placed into the network without an accurate 9-1-1 ALI database record and might not be answered by the appropriate 9-1-1 Public Safety Answering Point.
Relevant NENA Documents
Note: To find and download the document, copy the document number (like NENA-STA-010) from below and search the NENA Standards and Documents page.