NS International (NSI)

Updated: August 2026 – You photographed the train, noted the number – and then logged the location as “Amsterdam”. That already halves the value of the sighting, because Dutch cities have several stations, and the suffix is part of the name. NS International (NSI) carries cross-border traffic in its name and is therefore the right place to go through the logic of Dutch station names.

What is NS International (NSI)?

NS International stands for cross-border passenger services under the NS name stem. The suffix International is the actual statement of the name: it names traffic that crosses national borders. NS itself stands for Nederlandse Spoorwegen, the Dutch state railway – that explains the name stem, without implying anything about ownership stakes or responsibilities.

Operationally, the basic principle still holds: a railway operator runs trains, an infrastructure company operates the network. For identification in the field, the data panel with country code, keeper marking and vehicle number counts here too. On the Belgian section of the same route, the state railway SNCB/NMBS runs the trains.

Reading Dutch station names

A station name in the Netherlands almost always consists of a place name plus a suffix – and the suffix is not decoration, but the part that makes the station unambiguous.

Suffix	Meaning	English equivalent
Centraal	a city’s centrally located main station	Central/main station
Zuid	South	South
Noord	North	North
Oost	East	East
West	West	West

There’s also the common short form CS for Centraal Station, which you’ll come across in timetables and on displays. Some individual stations also carry suffixes that arose historically and today are simply part of the name.

Spellings that catch people out

Dutch place names have a few quirks that jar with German or English writing habits – and are correct nonetheless:

• Names starting with an apostrophe. Some place names begin with a leading abbreviation and an apostrophe. That belongs to the name and is written down along with it.
• Lower-case letters mid-name. Small words like van, den or der stay lower-case when they’re part of the name.
• Two names for the same city. For some cities there’s an official form and a commonly used one. When in doubt, the rule is: the spelling on the station sign.
• German or English exonyms are not a location. An anglicised or Germanised form doesn’t belong in a sighting, because it can no longer be traced back unambiguously later.

Anyone who has taken this on board gets an unspectacular but very effective quality gain in their logbook: locations that can still be identified years later.

Identification in the field

In the class database you’ll find vehicles that play a role in long-distance service, such as the ICNG, the TRAXX family as an example of multi-system locomotives, or the ICM Koploper. The general route from vehicle to company is described in the guide who’s actually running? identifying railway operators.

Sightings that stay unambiguous abroad too

In cross-border service there’s an extra pitfall: the vehicle you see doesn’t have to be registered in the country you’re standing in. That’s why two countries belong in every sighting – the country of registration from the data panel and the country of the observation location.

On the most important route, this can be run through at three stations. At Amsterdam Centraal, domestic and international services stand right next to each other at the platform. At Antwerpen-Centraal, the same vehicle is already running on a different network. Infrabel is responsible for that infrastructure. And at Paris Gare du Nord, the working ends among trains with quite different country codes on their data panels. High-speed services on this route today run under the Eurostar brand.

The guide to reporting sightings and the guide to the sightings logbook show how to turn this into a collection you can use for good. Related entries in the country are the state railway Nederlandse Spoorwegen, Arriva Nederland in regional services, and The Trainbutlers, an entry with a completely different naming pattern.

German and Dutch station names side by side

The two systems work the same way, only the words differ – and that’s exactly where mistakes creep in. Anyone who has once seen the comparison stops making them.

Function of the suffix	Germany	Netherlands
A city’s central station	Hauptbahnhof, abbreviated Hbf	Centraal, abbreviated CS
Location within the city	Süd, Nord, Ost, West	Zuid, Noord, Oost, West
Historic suffix	Terms from railway history	Same, today simply part of the name
Word for station	Bahnhof	station
Word for track	Gleis	spoor

Two words are worth learning on top of that: station for station and spoor for track. You’ll run into both constantly as soon as you look around a Dutch station or read a Dutch source.

The practical benefit lies less in understanding than in writing it down. Three rules are enough:

1. Copy it exactly. The name on the station sign is the reference – not your memory and not the English or German equivalent.
2. Leave nothing out. The suffix is the part that makes the station unambiguous. Without it, the location is incomplete.
3. When in doubt, write it out in full. Short forms like CS are common, but if you’re unsure, write the suffix out in full – that’s always correct.

Anyone who works this way ends up with a logbook in which sightings can actually be compared: by station, by country, by vehicle. And that’s exactly the difference between a collection and a pile.

Common mix-ups

• City name instead of station name – larger cities have several stations; without the suffix, the entry is worthless.
• Translating the suffix – “Rotterdam South” doesn’t exist; use the Dutch spelling.
• Country code equals country of observation – in cross-border service the two often differ.
• Reading the name suffix as a company name – “International” describes the business area, not a brand on the vehicle.
• Correcting an apostrophe or lower-case letter – such spellings are correct and belong to the name.

Conclusion

The name suffix International tells you what it’s about; the Dutch station suffixes tell you where you were. Together, both decide whether your sightings can be compared later on – and that costs you only a few extra letters in the location field.