Grants.gov is pleased to announce an upcoming update to the Assistance Listing format, shifting from numeric digits to alphanumeric program code, which will give agencies more flexibility for future listings. Existing Assistance Listing numbers will not change.
Currently, the assistance listing number is made up of a two-digit agency number, a period, and a three-digit program code (such as 31.123). Going forward, the two-digit agency number will not change. However, the format of the three-digit program code will begin to use alphanumeric characters in March 2026.
For example, in addition to existing identifiers (such as 31.123)—where the last three characters were strictly limited to numbers—Grants.gov will also support identifiers of the form 31.A1A, which include letters. This change increases the range of possible listing numbers, enabling more supported programs without increasing the number of characters.
Please note: This change may require action from System-to-System (S2S) users. Please check your inbox for suggestions to continue using Grants.gov efficiently while this update is being incorporated.
Keep an eye on the Grants.gov Releases page for more information.

