Anyone having lag spikes in the Netherlands?

I know that there are/were people having increased ping, but one of my clanmates living in the Netherlands is having serious lag spikes every 10 seconds. In one moment he has 21 ping, in the other it is 300 and he is teleporting.
He is rather curious as to what the cause is and if he is alone with this problem or not.

Edit:
His provider is UPC and he lives in Drachten.

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