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In most countries a residential address means one of a handful of national operators. Germany runs through a short list. France runs through four. Poland does not work that way: the regulator's own 2025 report puts roughly a third of Polish fixed-internet users on operators that each hold under one percent of the market. Not small in aggregate, small individually, thousands of them.

The address registry says the same thing from another direction. Poland announces around 2,459 autonomous systems against about 20 million IPv4 addresses, which works out near 8,100 addresses per network. Germany sits closer to 39,000 and France closer to 44,000. Poland has many more networks, each holding much less. Even the country's largest peering point is not in Warsaw, it is in Katowice, run by a not-for-profit association of smaller ISPs.

For anyone buying a Polish exit, that changes what the word "Polish" is describing. There is no single dominant network whose behaviour stands in for the country, so an address here is genuinely one of many rather than one of four. Breadth of coverage is a real quality axis in this market in a way it simply is not in Spain or the Netherlands.

Poland runs around nineteen percent IPv6 against Germany's seventy-two and France's eighty-four, and the national number hides the interesting part. The fixed networks are not the problem: Orange's fixed side runs in the forties, the old UPC cable network higher still. The mobile networks are the problem, and they are not a little behind, they are at a fraction of one percent.

So if you are buying Polish mobile, you are buying IPv4, and there is no version of that decision where you are not. It is worth knowing before you build anything that assumes a dual-stack exit. It also means Polish IPv4 is under real pressure, which is the usual road to carrier-grade NAT and shared addresses on the consumer side.

Poland operates two separate DNS blocklists that every consumer ISP is required to honour: a gambling register run by the finance ministry, and a fraud and phishing list run by the national CERT. Together they cover roughly 195,000 domains. We pulled both and compared them, and the intersection is exactly zero. They are two entirely separate lists doing two entirely separate jobs.

The consequence is a reachability quirk worth stating plainly, because it is the sort of thing that produces a confusing test result at two in the morning. A Polish consumer-ISP path and a Polish datacenter path do not resolve the same internet. If a domain fails from one Polish exit and works from another, that is not necessarily your proxy misbehaving, and it is not necessarily geo-blocking either. It may simply be which resolver sat in front of it.

Across the EU a discount has to be shown against the lowest price of the previous thirty days. Plenty of countries have that rule on paper. Poland has been fining for it: the competition regulator issued penalties in the tens of millions of zloty against large marketplaces during 2026 over exactly this, reported as non-final and under appeal at the time of writing.

That turns price monitoring from a competitive nicety into a compliance artifact. If you sell into Poland, someone should be able to show what your Polish listing said thirty days ago, and reading a Polish storefront reliably means reading it from a Polish address. It is the same argument as the German one and the enforcement record behind it is heavier.