> ## Documentation Index
> Fetch the complete documentation index at: https://docs.catenatelematics.com/llms.txt
> Use this file to discover all available pages before exploring further.

# List HOS Regions

> Get a paginated list of Hours of Service (HOS) regions reference data



## OpenAPI

````yaml https://api.catenatelematics.com/v2/telematics/openapi.json get /v2/telematics/ref-hos-regions
openapi: 3.1.0
info:
  title: Telematics Data Service - REST API
  description: Telematics Data Service REST API.
  version: 0.1.0
servers:
  - url: https://api.catenatelematics.com
    description: Catena Telematics API
security: []
tags:
  - name: Fleet Operations & Tracking
    description: >-
      Endpoints for tracking vehicles, trailers, assets, and trip activity —
      including locations, movements, and operational telemetry. Useful for
      monitoring utilization and real-time operational status.
  - name: Safety & Driver Behavior
    description: >-
      Endpoints that provide safety-related insights such as harsh braking,
      speeding, and other driver behavior events. Supports risk analysis and
      safety program automation.
  - name: Compliance & Regulation
    description: >-
      Endpoints covering regulated requirements including DVIR inspections,
      Hours of Service (HOS), violations, and IFTA fuel tax reporting. Helps
      organizations meet DOT/FMCSA and interstate regulatory obligations.
  - name: Maintenance & Vehicle Health
    description: >-
      Endpoints providing data for vehicle condition monitoring and maintenance
      workflows, such as DVIR defects and diagnostic sensor events. Enables
      early issue detection and reduced downtime.
  - name: Drivers & Users
    description: >-
      Endpoints related to driver and user identities, assignments, and
      operational context. Supports linking operational and safety data to
      specific individuals.
  - name: Reference Data (Supporting Tables)
    description: >-
      Lookup tables and enumerations that supply standardized codes, metadata,
      and classifications used across the API.
  - name: Analytics (deprecated)
    description: >-
      Endpoints providing analytical insights and aggregated data for vehicles,
      fleets, drivers, and trailers.
paths:
  /v2/telematics/ref-hos-regions:
    get:
      tags:
        - Reference Data (Supporting Tables)
      summary: List HOS Regions
      description: Get a paginated list of Hours of Service (HOS) regions reference data
      operationId: list_hos_regions_reference
      parameters:
        - name: cursor
          in: query
          required: false
          schema:
            anyOf:
              - type: string
              - type: 'null'
            description: Cursor for the next page
            title: Cursor
          description: Cursor for the next page
        - name: size
          in: query
          required: false
          schema:
            type: integer
            maximum: 1000
            minimum: 1
            description: Page size
            default: 300
            title: Size
          description: Page size
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/_CursorPage_RefHosRegion_'
        '400':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BadRequest'
          description: Bad Request
        '401':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Unauthorized'
          description: Unauthorized
        '403':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Forbidden'
          description: Forbidden
        '404':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/NotFound'
          description: Not Found
        '405':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/MethodNotAllowed'
          description: Method Not Allowed
        '409':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Conflict'
          description: Conflict
        '422':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/UnprocessableEntity'
          description: Unprocessable Entity
        '429':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TooManyRequests'
          description: Too Many Requests
        '500':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/InternalServerError'
          description: Internal Server Error
        '501':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/NotImplementedResponse'
          description: Not Implemented
      security:
        - Bearer:
            - telematics:read
components:
  schemas:
    _CursorPage_RefHosRegion_:
      properties:
        items:
          items:
            $ref: '#/components/schemas/RefHosRegion'
          type: array
          title: Items
        total:
          type: integer
          minimum: 0
          title: Total
        current_page:
          anyOf:
            - type: string
            - type: 'null'
          title: Current Page
          description: Cursor to refetch the current page
        current_page_backwards:
          anyOf:
            - type: string
            - type: 'null'
          title: Current Page Backwards
          description: Cursor to refetch the current page starting from the last item
        previous_page:
          anyOf:
            - type: string
            - type: 'null'
          title: Previous Page
          description: Cursor for the previous page
        next_page:
          anyOf:
            - type: string
            - type: 'null'
          title: Next Page
          description: Cursor for the next page
      type: object
      required:
        - items
        - total
      title: _CursorPage[RefHosRegion]
    BadRequest:
      properties:
        code:
          type: integer
          title: Code
          default: 400
        message:
          type: string
          title: Message
          default: Bad Request
        detail:
          anyOf:
            - type: string
            - type: 'null'
          title: Detail
      type: object
      title: BadRequest
    Unauthorized:
      properties:
        code:
          type: integer
          title: Code
          default: 401
        message:
          type: string
          title: Message
          default: Unauthorized
        detail:
          anyOf:
            - type: string
            - type: 'null'
          title: Detail
      type: object
      title: Unauthorized
    Forbidden:
      properties:
        code:
          type: integer
          title: Code
          default: 403
        message:
          type: string
          title: Message
          default: Forbidden
        detail:
          anyOf:
            - type: string
            - type: 'null'
          title: Detail
      type: object
      title: Forbidden
    NotFound:
      properties:
        code:
          type: integer
          title: Code
          default: 404
        message:
          type: string
          title: Message
          default: Not Found
        detail:
          anyOf:
            - type: string
            - type: 'null'
          title: Detail
      type: object
      title: NotFound
    MethodNotAllowed:
      properties:
        code:
          type: integer
          title: Code
          default: 405
        message:
          type: string
          title: Message
          default: Method Not Allowed
        detail:
          anyOf:
            - type: string
            - type: 'null'
          title: Detail
      type: object
      title: MethodNotAllowed
    Conflict:
      properties:
        code:
          type: integer
          title: Code
          default: 409
        message:
          type: string
          title: Message
          default: Conflict
        detail:
          anyOf:
            - type: string
            - type: 'null'
          title: Detail
      type: object
      title: Conflict
    UnprocessableEntity:
      properties:
        code:
          type: integer
          title: Code
          default: 422
        message:
          type: string
          title: Message
          default: Invalid Request Body
        detail:
          anyOf:
            - items:
                $ref: '#/components/schemas/ValidationErrorDetail'
              type: array
            - type: 'null'
          title: Detail
      type: object
      title: UnprocessableEntity
    TooManyRequests:
      properties:
        code:
          type: integer
          title: Code
          default: 429
        message:
          type: string
          title: Message
          default: Too Many Requests
        detail:
          anyOf:
            - $ref: '#/components/schemas/RetryAfterDetail'
            - type: 'null'
      type: object
      title: TooManyRequests
    InternalServerError:
      properties:
        message:
          type: string
          title: Message
          default: Internal Server Error
      type: object
      title: InternalServerError
    NotImplementedResponse:
      properties:
        code:
          type: integer
          title: Code
          default: 501
        message:
          type: string
          title: Message
          default: Not Implemented
        detail:
          anyOf:
            - type: string
            - type: 'null'
          title: Detail
      type: object
      title: NotImplementedResponse
    RefHosRegion:
      properties:
        region_code:
          type: string
          title: Region Code
          description: >-
            Canonical region code (ISO-3166-2), e.g., 'US-CA', 'CA-ON'. Primary
            key.
        country_code:
          type: string
          title: Country Code
          description: Country code (ISO-3166-1 alpha-2), e.g., 'US', 'CA'.
        country_name:
          type: string
          title: Country Name
          description: Country name (e.g., 'United States', 'Canada').
        region_code_iso2:
          type: string
          title: Region Code Iso2
          description: >-
            Subdivision code component of ISO-3166-2 (the part after the
            hyphen), e.g., 'CA' for US-CA, 'ON' for CA-ON.
        region_name:
          type: string
          title: Region Name
          description: Region/subdivision name, e.g., 'California', 'Ontario'.
      type: object
      required:
        - region_code
        - country_code
        - country_name
        - region_code_iso2
        - region_name
      title: RefHosRegion
      description: 'Reference: HOS regions (country/region codes)'
    ValidationErrorDetail:
      properties:
        path:
          type: string
          title: Path
        input:
          type: string
          title: Input
        message:
          type: string
          title: Message
        error_type:
          type: string
          title: Error Type
      type: object
      required:
        - path
        - input
        - message
        - error_type
      title: ValidationErrorDetail
    RetryAfterDetail:
      properties:
        retry_after_seconds:
          type: integer
          title: Retry After Seconds
        message:
          type: string
          title: Message
      type: object
      required:
        - retry_after_seconds
        - message
      title: RetryAfterDetail
  securitySchemes:
    Bearer:
      type: oauth2
      flows:
        clientCredentials:
          refreshUrl: >-
            https://auth.catenatelematics.com/realms/catena/protocol/openid-connect/token
          scopes: {}
          tokenUrl: >-
            https://auth.catenatelematics.com/realms/catena/protocol/openid-connect/token
        authorizationCode:
          refreshUrl: >-
            https://auth.catenatelematics.com/realms/catena/protocol/openid-connect/token
          scopes: {}
          authorizationUrl: >-
            https://auth.catenatelematics.com/realms/catena/protocol/openid-connect/auth
          tokenUrl: >-
            https://auth.catenatelematics.com/realms/catena/protocol/openid-connect/token

````