Sprawdzam numer przesyłki.

Sprawdzam is the 1st person singular present tense form of the verb sprawdzać.

So it means:

• I am checking
• I check

Polish present tense often covers both the continuous and simple present meanings that English separates.

Polish usually omits subject pronouns when they are obvious from the verb ending.

The ending -am in sprawdzam already tells you the subject is I.

So:

• Sprawdzam numer przesyłki. = I’m checking the shipment number.
• Ja sprawdzam numer przesyłki. is also possible, but ja adds emphasis, like I’m the one checking it.

The dictionary form is sprawdzać.

This is the imperfective verb, which is used for:

• ongoing actions
• repeated actions
• general actions

Its perfective partner is sprawdzić.

So:

• sprawdzam = I am checking / I check
• sprawdzę = I will check (perfective future)

Because numer is the direct object of sprawdzam, and after sprawdzać you normally use the accusative case.

The noun numer is a masculine inanimate noun, and in the singular its:

• nominative form = numer
• accusative form = numer

So even though the case changes grammatically, the word looks the same.

Because przesyłki is not the direct object here.

The direct object is numer.

Przesyłki depends on numer and means of the shipment / of the parcel. In Polish, after a noun like numer, you often use the genitive:

• numer czego? = number of what?
• numer przesyłki = the shipment’s number / the package number

So:

• przesyłkę would be accusative, used if przesyłka itself were the direct object
• przesyłki here is genitive singular

The dictionary form is przesyłka.

It is a feminine noun meaning something like:

• shipment
• parcel
• package
• consignment

In this sentence, przesyłki is the genitive singular form of przesyłka.

Often, yes — in many contexts numer przesyłki is used for the number connected with a parcel or shipment, especially when checking delivery details.

However, if you want to be very specific, Polish also uses:

• numer śledzenia = tracking number

So:

• numer przesyłki = shipment/package number
• numer śledzenia = tracking number, more explicitly

In everyday contexts, numer przesyłki is very natural.

Yes.

Because sprawdzam is an imperfective present tense form, it can refer to:

• an action happening right now
  
  • I’m checking the shipment number
• a habitual or regular action
  
  • I check the shipment number

Context tells you which meaning is intended.

Sprawdzam numer przesyłki is a very neutral word order.

Polish word order is more flexible than English, so you can move things around for emphasis. For example:

• Sprawdzam numer przesyłki. = neutral
• Numer przesyłki sprawdzam. = puts more focus on the shipment number

But not every rearrangement sounds equally natural. The original sentence is the safest and most standard version.

Because Polish does not have articles.

English needs words like:

• a
• an
• the

Polish does not. The meaning is understood from context.

So numer przesyłki could mean:

• the shipment number
• a shipment number

In real use, context normally makes it clear.

A rough English-friendly guide is:

SPRAHV-jam NOO-mer pshe-SWIHW-kee

A few useful details:

• sz sounds like sh
• cz sounds like ch in chop
• rz often sounds like zh as in measure
• ł sounds like English w
• stress in Polish is usually on the second-to-last syllable

So:

• sprawdzam → stress on spraw
• przesyłki → stress on sył

Yes, but it means something different.

• Sprawdzam numer przesyłki. = I am checking the shipment number / I check the shipment number
• Sprawdzę numer przesyłki. = I will check the shipment number

So the difference is mainly aspect and time reference:

• sprawdzam = imperfective present
• sprawdzę = perfective future

If you mean the action is happening now, sprawdzam is the correct choice.