GSRN-96
Global Service Relation Number (96-bit)
urn:epc:id:gsrnWhat is GSRN-96?
Identifies a relationship between a service provider and a recipient - a loyalty card member, a hospital patient, a library patron. The GSRN does not identify the person; it identifies the service relationship.
Used for: Loyalty programmes, hospital patient wristbands, library cards, gym memberships.
Field layout
The first 8 bits are always the header (0x2D = 45 decimal), which identifies this as GSRN-96. The partition field determines how bits are divided between the company prefix and the following reference field - see the partition table below.
Defined in GS1 EPC Tag Data Standard v2.3, Section 7.8 (Global Service Relation Number – Recipient), encoding procedure in Section 14.6.6.1.
| Bits | Field | Description |
|---|---|---|
0–7 | Header | 0x2D (45) - identifies this encoding as GSRN-96 |
8–10 | Filter | Currently only value 0 is defined. |
11–13 | Partition | Splits bits between company prefix and service reference. |
14–53 | Company Prefix | GS1 Company Prefix of the service provider. |
54–71 | Service Reference | Reference number for this service relationship. |
72–95 | Reserved | 24 bits reserved. Must be zero. |
Filter values
The 3-bit filter field does not affect identity - it tells readers what packaging level or category the tag is applied to. The same item with different filter values has the same Pure Identity URI.
Source: GS1 EPC TDS v2.3, Table 10-6.
| Value | Name | Description |
|---|---|---|
0 | All others | Unspecified service relation |
1 | Reserved | Not yet assigned |
2 | Reserved | Not yet assigned |
3 | Reserved | Not yet assigned |
4 | Reserved | Not yet assigned |
5 | Reserved | Not yet assigned |
6 | Reserved | Not yet assigned |
7 | Reserved | Not yet assigned |
Partition table
The 3-bit partition value determines how the fixed bit space is divided between the company prefix and the following reference field. GS1 company prefixes vary in length (6–12 digits), so the partition tells the decoder where one field ends and the next begins.
Source: GS1 EPC TDS v2.3, Table 14-23.
| Partition | Prefix bits | Prefix digits | Ref bits | Ref digits |
|---|---|---|---|---|
0 | 40 | 12 | 18 | 5 |
1 | 37 | 11 | 21 | 6 |
2 | 34 | 10 | 24 | 7 |
3 | 30 | 9 | 28 | 8 |
4 | 27 | 8 | 31 | 9 |
5 | 24 | 7 | 34 | 10 |
6 | 20 | 6 | 38 | 11 |
Related schemes
Source
GS1 EPC Tag Data Standard, Release 2.3, Ratified October 2025 - see Section 7.8 (Global Service Relation Number – Recipient) and Section 14.6.6.1 for the encoding procedure. Read the EPC encoding guide for a full worked example of decoding hex to URI.