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Information Services - Data Collection

State Assigned Student Identifier (SASID)

What is SASID?

A State Assigned Student Identifiers (SASID) is a unique identifier given to each student receiving a publicly funded education in Massachusetts. The SASID number remains with the student throughout his or her educational life in grades pre-K through 12, even as the student transfers from one district or school to another. If the student leaves the state and returns, the student will receive his/her original SASID. Districts can apply for a SASID using the Single Student Registration (SSR) or the Multiple Student Registration (MSR) applications. Once the SASID is assigned, districts can retrieve the unique identifier using the Publish Manager application.

Note: Districts who are paying tuition for students attending collaboratives, private facilities or private schools must apply for the SASID and provide those facilities with the SASID.

To receive a SASID for each student, districts must submit the following 8 student characteristics in the correct format to the Department: LASID, First Name, Middle Name, Last Name, Date of Birth, Gender, City/Town of Birth and Town of Residence in a comma separated value (.csv) or text (.txt) file for MSR or directly on the web using SSR. MSR and SSR will be available for district use all year.

When a district applies for a SASID, the student's demographic information is compared to every other student record in the ESE database. If the demographic information is determined to be unique, a 10 digit SASID will be generated for the student. If the demographic information is an exact match to an existing record, the existing SASID will be provided. If the demographic information is a potential match for an existing record, a case is created and the application will display the number "411." This means that more than one student had similar characteristics, that two districts are claiming the same student or that the district submitted the same student twice using similar characteristics. In these cases, ESE staff reviews the information and determines if the two records are the same student or if a new unique SASID is required. As "411" cases are resolved, the SASID numbers for those students are then posted to the original file located in Publish Manager.

For questions regarding SASID assignment or "411" cases, contact Data Collection at (781) 338-6777.

Single Student Registration (SSR)

The Single Student Registration System (SSR) provides school districts with instant access to the ESE student database. This application can be accessed from and is primarily used for individual SASID look ups and SASID assignments. In order to access this application, the user must be set up as an SSR user in Directory Administration. This application allows the district user to lookup a student's SASID, verify a present SASID and assign SASID numbers to students within a district.

Multiple Student Registration (MSR)

The Multiple Student Registration System (MSR) provides school districts the ability to assign SASID numbers to 5 or more students in one session via a .csv or .txt file. The file must include the standard header and format (see MSR Header document below). The MSR application can be accessed from In order to access this application the user must be set up as an MSR user in Directory Administration.

The results of the SASID assignment requests submitted in MSR can be accessed in the Publish Manager application. Records that are an exact match to an existing student record will have SASIDs published right away, while records that result in a "411" case will have SASIDs available in the Publish Manager file by the next day after the case is resolved by ESE staff.

Download PDF Document  Download MS WORD Document
MSR Header - Updated 10/03/2016

Transfer Cards

ESE provides transfer cards that include a place to indicate the student's state id (SASID). These transfer cards should be used when a student transfers between Massachusetts' school districts.

Download PDF Document  Download MS WORD Document
Transfer Card

Last Updated: October 3, 2016
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