Der Netzbetreiber prüft die Netzabdeckung und den Einzelverbindungsnachweis.

Because der Netzbetreiber is the subject of the sentence, so it is in the nominative case.

• der = nominative masculine singular article
• Netzbetreiber is masculine because the noun Betreiber is masculine

So der Netzbetreiber means the network operator as the one doing the action.

The verb is prüfen in the infinitive, but here it is conjugated for er/sie/es because the subject is singular: der Netzbetreiber.

Present tense of prüfen:

• ich prüfe
• du prüfst
• er/sie/es prüft
• wir prüfen
• ihr prüft
• sie/Sie prüfen

So:

• Der Netzbetreiber prüft ... = The network operator checks/examines ...

Both nouns are direct objects of prüft, so both are in the accusative case. But their articles look different because the nouns have different genders.

• die Netzabdeckung

  • Netzabdeckung is feminine
  • feminine article in the accusative singular stays die

• den Einzelverbindungsnachweis

  • Einzelverbindungsnachweis is masculine
  • masculine article changes from der to den in the accusative singular

So the sentence has:

• subject in nominative: der Netzbetreiber
• two direct objects in accusative: die Netzabdeckung and den Einzelverbindungsnachweis

In German compound nouns, the last part usually determines the gender.

• Netzabdeckung → last part is Abdeckung → die Abdeckung → so die Netzabdeckung
• Einzelverbindungsnachweis → last part is Nachweis → der Nachweis → so der Einzelverbindungsnachweis

This is a very useful rule for German compounds.

They are compound nouns, which are extremely common in German.

Netzabdeckung

• Netz = network
• Abdeckung = coverage

So it literally means something like network coverage.

Einzelverbindungsnachweis

This is a formal/technical compound:

• Einzel = individual
• Verbindung = connection/call
• Nachweis = record/proof/listing

Together, it refers to an itemized record of connections/calls, often in phone billing language.

German often packs several ideas into one noun instead of using a phrase.

This is a normal main clause in German, and in a German main clause the conjugated verb usually comes in position 2.

So the structure here is:

• Der Netzbetreiber = position 1
• prüft = position 2
• die Netzabdeckung und den Einzelverbindungsnachweis = the rest of the clause

This is standard German word order: Subject + conjugated verb + objects

Because the two nouns have different genders and each noun needs its own correct article.

• die Netzabdeckung
• den Einzelverbindungsnachweis

You cannot use one article for both because die would not fit the masculine noun, and den would not fit the feminine noun.

If the nouns had the same article form, repetition might still be used, but here it is definitely necessary.

Both nouns are separate direct objects connected by und.

So the structure is:

• prüft die Netzabdeckung
• prüft den Einzelverbindungsnachweis

The sentence simply combines them:

• Der Netzbetreiber prüft die Netzabdeckung und den Einzelverbindungsnachweis.

So und is linking two items in the same grammatical role.

prüfen is a flexible verb. Depending on context, it can mean:

• to check
• to examine
• to inspect
• to review
• to test

In this sentence, something like check or review is probably the most natural idea.

German often uses prüfen in formal, technical, or administrative contexts where English might choose different verbs depending on the situation.

If the subject were plural, both the article and the verb would change:

• singular: Der Netzbetreiber prüft ...
• plural: Die Netzbetreiber prüfen ...

So:

• Die Netzbetreiber prüfen die Netzabdeckung und den Einzelverbindungsnachweis.

Changes:

• der → die for plural nominative
• prüft → prüfen for plural verb agreement

Yes. The vocabulary sounds quite technical, bureaucratic, or telecommunications-related.

Especially:

• Netzbetreiber
• Netzabdeckung
• Einzelverbindungsnachweis

These are typical of formal written German, contracts, phone service information, billing documents, or customer support language.

A learner should notice that German often uses very long, precise compound nouns in formal contexts.