From NENA Knowledge Base

X.509 is an ITU-T standard for a public key infrastructure (PKI) and Privilege Management Infrastructure (PMI). In NG9-1-1, refers to the format of a certificate containing a public key.

Related Terms:


A field in an X.509 digital certificate which typically contains identifying information for the entity issued the certificate. In an ESInet, SubjectAltName contains an agent or agency ID.

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.

  • NENA-STA-010, NENA i3 Standard for Next Generation 9-1-1
  • NENA 75-001, NENA Security for Next-Generation 9-1-1 Standard (NG-SEC)