De houder registreert het chipnummer.

Dutch nouns have grammatical gender, and singular definite articles depend on that:

• de is used with common-gender nouns
• het is used with neuter nouns

So:

• houder is a de-word → de houder
• chipnummer is a het-word → het chipnummer

This is something you usually have to learn with each noun. In the plural, both would take de:

• de houders
• de chipnummers

Houder literally means holder, but in real usage it often means the person who officially possesses, keeps, or is responsible for something.

Depending on context, it can mean something like:

• holder
• owner
• keeper
• registered keeper

In a sentence about a chip number, it likely refers to the person responsible for the animal or object with that chip.

Registreren is the infinitive, meaning to register.

In this sentence, the subject is de houder, which is third-person singular, so the present tense form is:

• ik registreer
• jij registreert
• hij/zij/de houder registreert

So de houder registreert means the holder registers.

A useful rule: for most regular verbs in the present tense, Dutch adds -t in the third-person singular.

Yes. This is standard Dutch main-clause word order:

Subject + verb + object

• De houder = subject
• registreert = verb
• het chipnummer = object

So it directly matches basic English word order:

The holder registers the chip number.

Dutch usually forms compound nouns by writing them as a single word.

So instead of something like chip number, Dutch makes:

• chip + nummer = chipnummer

This is very common in Dutch. Other examples:

• telefoonnummer = telephone number
• huisdierpaspoort = pet passport
• straatnaam = street name

English often writes these as separate words, but Dutch often combines them.

Here chip refers to an electronic chip, often a microchip.

So chipnummer means the identification number linked to that chip. In many real-world contexts, this is especially used for animal microchips.

Yes. Depending on context, registreren can mean:

• to register
• to record
• to enter into a system
• to log

In administrative or official contexts, it often means entering information into a database or formal register.

So in this sentence, registreert probably means something like officially records or enters into the register.

A rough pronunciation guide is:

• registreert ≈ reh-ghih-STREERT

A few helpful points:

• the g in Dutch is usually a throaty sound, not like English g
• the stress is on the last part: -streert
• ee gives a long ay-like vowel sound

If you are a beginner, it is fine at first to aim for a simpler approximation before mastering the Dutch g.

Because Dutch prefers noun compounds.

English often uses separate words:

• chip number

Dutch usually combines them:

• chipnummer

So you do not need van here.
Het nummer van de chip is possible, but it is a different structure and usually less compact than het chipnummer.

Yes, possibly, but the meaning changes slightly.

• houder focuses on the person who officially holds or is responsible for something
• eigenaar means owner

Sometimes those are the same person, but not always. If the official wording uses houder, it is usually better to keep that word, because it may be legally more precise than eigenaar.

The plural would be:

De houders registreren de chipnummers.

Changes:

• houder → houders
• registreert → registreren
• het chipnummer → de chipnummers

Notice that plural nouns take de, even if the singular was het.

Yes. Nummer is a very common word meaning number.

You will see it in many compounds, for example:

• telefoonnummer = telephone number
• huisnummer = house number
• kentekennummer = registration number / plate number
• chipnummer = chip number

Learning common building-block words like nummer makes Dutch compounds much easier to understand.

Yes. Registreert is present tense.

In Dutch, the present tense can describe:

• something happening now
• a habitual action
• a general rule or official procedure

So this sentence could mean either:

• the holder is registering the chip number now, or
• the holder registers the chip number as part of the normal procedure

The broader context usually makes it clear.