---
title: "Look up by EIN"
method: GET
path: "/v1/employers/ein/{ein}"
tags: ["Employers"]
---

# Look up by EIN

`GET /v1/employers/ein/{ein}`

Lookup employers by FEIN (Federal Employer Identification Number).

Returns all locations matching the given EIN. Insurance professionals
identify employers by FEIN — this is the primary lookup for underwriting
integrations.

EIN format: 9 digits (e.g., '943067788' or '94-3067788').

## Path parameters

- `ein` string, required

## Query parameters

- `state` string — State code filter
- `limit` integer
- `offset` integer

## Headers

- `X-Api-Key` string

## Response `200`

Successful Response

- unknown

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.net/fastdol/apis/fastdol-api.md) · [All operations](https://skmtc.net/fastdol/apis/fastdol-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/fastdol/fastdol-api/revisions/f5a72ed18934/schema)