# RailcarID

> Public field guide to North American freight-railcar reporting marks and the stencils painted on the car. For railfans, modelers, and small shippers.

RailcarID is not a railroad, not a lessor, and not Railinc. It does not show live car location and it does not republish equipment-register data.

The mark-to-owner dataset has 4092 reporting marks, compiled from the English Wikipedia pages "List of reporting marks: A" through "Z" and licensed CC BY-SA 4.0. Retrieved 2026-10-18T02:46:37.303Z.

## Look up a mark

- [Home](https://railcarid.com/): search box. Queries like "TILX 123456" split into a reporting mark and a car number.
- [Mark directory](https://railcarid.com/marks): browse A–Z.
- [Example mark, TILX](https://railcarid.com/mark/TILX): owner, what the suffix means, related marks.
- [Example car, TILX 123456](https://railcarid.com/car/TILX/123456): mark info plus placeholders for photos and sightings.
- Mark pages follow /mark/{MARK}. Car pages follow /car/{MARK}/{NUMBER}.

## Stencils and placards

Original explainers, not copied from the mark dataset:

- [Stencil guide](https://railcarid.com/stencils)
- [Capacity (CAPY)](https://railcarid.com/stencils/capacity)
- [Load limit (LD LMT)](https://railcarid.com/stencils/load-limit)
- [Light weight (LT WT)](https://railcarid.com/stencils/light-weight)
- [Built date (BLT)](https://railcarid.com/stencils/built-date)
- [Consolidated stencil](https://railcarid.com/stencils/consolidated-stencil)
- [ACI and AEI tags](https://railcarid.com/stencils/aci-aei)
- [Tank car specification stencil](https://railcarid.com/stencils/tank-spec)
- [Hazmat placards](https://railcarid.com/placards)

## Open data

- [Open data page](https://railcarid.com/data): attribution, changes, and downloads.
- [JSON download](https://railcarid.com/downloads/reporting-marks.json)
- [CSV download](https://railcarid.com/downloads/reporting-marks.csv)
- License: CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/)

## About

- [About RailcarID](https://railcarid.com/about)

Photo stencil scanning and a cross-site car-number photo index are planned. They are not live. When photo links are added, each record is meant to keep the source page URL, photographer credit, source site, and whether a thumbnail is allowed.