GSRN Checker Guide – Verify Global Service Relation Numbers with Ease

What is a GSRN Number?

GSRN (Global Service Relation Number) is a GS1 standard identifier that uniquely represents a service relationship between a provider and a recipient. It is widely used in utilities (electricity, gas, water meters), contract management, subscription services, and more. A GSRN is an 18‑digit number comprising a GS1 company prefix, a service reference, and a final modulo‑10 check digit. The check digit uses the same weighting algorithm as EAN‑13 (odd positions ×3, even ×1, sum modulo 10 subtracted from 10). GSRNs can be encoded in GS1‑128 barcodes or used in EDI, streamlining service point identification, meter reading, and billing reconciliation.

How to Use This GSRN Checker?

Three simple steps to verify any GSRN:

1. Paste or type the 18‑digit number into the input field (automatic filtering keeps only digits).
2. Click the Validate button – the tool runs a full GS1‑compliant check via our backend.
3. Read the result: you’ll know instantly whether the GSRN is structurally valid and the check digit matches.

Try the sample numbers provided to see the tool in action. If you enter an incorrect length, alphabetic characters, or a wrong check digit, you’ll get a clear error message.

This GSRN Checker is completely free and requires no registration. It’s ideal for utility companies, energy management system integrators, and IoT device administrators.

Frequently Asked Questions

1. Does a valid GSRN guarantee that the service relationship actually exists?

No – this GSRN Checker only validates the structural format and the modulo‑10 check digit. A “valid” result means the number conforms to GS1 syntax. To confirm an active service relationship, you must query the issuing authority’s internal database (e.g., the utility company).

2. Why does my GSRN show as invalid?

Common reasons: the number is not exactly 18 digits; it contains spaces or non‑numeric characters; or the check digit doesn’t match the computed value. Try using one of the example numbers to verify the tool is working properly.

3. Can this GSRN Checker process multiple numbers at once?

This page is designed for single‑number validation. For bulk checking, please consider our API solution (contact us for details).

4. What’s the difference between GSRN and GIAI?

GIAI (Global Individual Asset Identifier) identifies a physical asset, such as a specific machine. GSRN identifies a service relationship, like a supply contract for a meter. Both are GS1 identifiers but serve different semantic purposes.

5. How is GSRN used with smart meters?

Smart meters often encode the GSRN in a GS1‑128 barcode or RFID tag. During installation, scanning the GSRN links the physical device to the customer account, simplifying field operations and automated meter reading.

If you have further questions, feel free to reach out via the contact information at the bottom of the page. Thank you for using our GSRN Checker!