---
title: LEI Test Data — Free LEI (ISO 17442) Test Data
description: Valid, MOD-97-checked Legal Entity Identifiers (ISO 17442). CC0-1.0, JSON and CSV, small/medium/large.
canonical: https://stanzaapi.com/datasets/lei
---

[Home](/)/[Open Test Data](/datasets)/LEI Test Data

# LEI Test Data

Valid, MOD-97-checked Legal Entity Identifiers (ISO 17442).

Format: LEI (ISO 17442) · Licence: CC0-1.0, engine-validated

## What it is

Twenty-character LEIs with a correctly computed ISO 7064 MOD-97-10 check-digit pair. Synthetic entities; not registered organisations.

## Downloads

| Size | Rows | Formats |
| --- | --- | --- |
| Small | 100 rows | [.json](/datasets/lei/small.json) · [.csv](/datasets/lei/small.csv) |
| Medium | 2,000 rows | [.json](/datasets/lei/medium.json) · [.csv](/datasets/lei/medium.csv) |
| Large | 20,000 rows | [.json](/datasets/lei/large.json) · [.csv](/datasets/lei/large.csv) |

## Cite this dataset

If you use this data, please cite the **concept DOI** — it always resolves to the latest version:

```
StanzaAPI. (2026). LEI Test Data. CC0-1.0.
DOI: 10.5281/zenodo.23076180
https://stanzaapi.com/datasets/lei
```

[https://doi.org/10.5281/zenodo.23076180](https://doi.org/10.5281/zenodo.23076180) (all versions) · [10.5281/zenodo.23076181](https://doi.org/10.5281/zenodo.23076181) (v1.0.0)

## Columns

| Key | Meaning |
| --- | --- |
| `lei` | LEI |
| `lou_prefix` | LOU prefix |
| `entity_id` | Entity part |

## Frequently Asked Questions

Is this LEI (ISO 17442) test data free to use?

Yes. The rows are released under CC0-1.0, so you can copy, modify, and redistribute them without attribution.

Is the data real?

No. All rows are synthetic. Every value is validated by the StanzaAPI engine for this format: it matches the standard structure and passes the format’s check-digit algorithm.

How is the dataset generated?

Deterministically from a fixed seed, so the same size always produces the same rows. That makes it safe to pin in a fixture or CI pipeline.