Does changing DNS speed up your internet? (the honest answer)
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"Just switch to 8.8.8.8, your internet will fly." It is one of the most repeated pieces of advice on forums, offered as a cure for everything from high ping to pages that take forever to load. The honest answer sits in the middle: changing your DNS does not make your connection faster, but in some cases it does improve the part of the internet that feels fast. Knowing which is which saves you from fiddling with settings for nothing.
What DNS actually does
DNS (Domain Name System) is the phone book of the internet. When you type
hizimkac.com into your browser, your computer has no idea which IP address
that name belongs to. It asks a DNS server, gets an answer, and only then
connects to that address.
Here is the part people miss: that question-and-answer happens once, at the very beginning of the connection. Once the page starts loading, the data flowing to you has nothing to do with DNS any more. Changing your DNS is like finding the delivery address faster — it does not make the truck drive quicker.
Does changing DNS increase download speed? No
Let us be blunt. If you pay for a 50 Mbps plan, it stays a 50 Mbps plan after you change DNS. What determines download speed is your plan, the infrastructure at your address, your modem and your Wi-Fi — not name resolution.
So everyone saying "I changed my DNS and the speed test looked identical" is correct: a speed test measures throughput after the connection to the test server is already open, which leaves DNS outside the measurement. If you want the mechanics, we broke them down in how internet speed is measured.
Then why do people swear it got faster?
Because what they noticed was not speed — it was response time. A single web page is not one address: fonts, ads, images, analytics scripts and trackers can trigger lookups to 20-40 different domains. If your provider's DNS server is slow or far away, every one of those lookups adds 60-100 ms before anything appears on screen.
A fast resolver can bring the same lookup down to 10-20 ms. The page feels like it snaps open. The file you download afterwards arrives at exactly the same rate. What DNS buys you is waiting time, not bandwidth.
That distinction is the whole basis of the "my speed test is high but the internet feels slow" complaint — the other causes are listed in speed test is high but the internet feels slow.
Is changing DNS good for gaming? It will not lower your ping
This myth is a stubborn one. In-game ping is the round trip between your machine and the game server. The server's address is resolved once, when you join; after that all traffic flows straight over IP. DNS is simply not in that loop.
You cannot turn a 90 ms ping into 40 ms by switching resolvers. What actually lowers ping is different: wiring up with Ethernet, picking the closest server region, clearing the line, and enabling QoS/SQM against bufferbloat. The full list is in how to lower ping, and if the terms are new, start with what are ping and jitter.
The one honest exception: matchmaking and launcher screens involve lookups, so a snappier resolver can shave a moment off getting into a match. It does nothing once you are in it.
When changing DNS genuinely helps
None of this makes it useless — it just needs the right expectations. It is worth doing when:
- Pages are slow to start loading. If you stare at a blank white screen before anything appears, yet your download speed is normal, DNS is a fair suspect.
- Your ISP's resolver is misbehaving. Some sites load, others do not — a classic symptom.
- You want privacy. Public resolvers (Cloudflare 1.1.1.1, Google 8.8.8.8, Quad9 9.9.9.9) publish their logging policies openly; most ISPs do not.
- You want filtering. Quad9 blocks known malicious domains, and some services block ads or adult content at the DNS level.
What not to expect:
| Expectation | Reality |
|---|---|
| Download speed goes up | It does not |
| Upload speed goes up | It does not |
| In-game ping drops | It does not |
| Pages begin loading sooner | Yes, if your ISP's resolver is slow |
| Dropouts stop | No — that is a line problem |
| Video buffers less | No — that is bandwidth and Wi-Fi |
Which DNS is fastest? Only you can answer that
Be sceptical of "the fastest DNS is X" lists. Resolver speed depends on where you are and who your ISP is: the nearest Cloudflare node might answer you in 8 ms while someone two cities over gets a better result from a different service. Sometimes your ISP's own resolver wins precisely because it sits inside their network.
To measure roughly, time a few candidate resolvers with nslookup or dig
from a terminal, or use a DNS benchmarking tool. After you switch, flush your
browser and OS caches — otherwise stale answers will fool you into thinking
nothing changed.
Before you switch: is it really DNS?
There is a simple isolation test. Type a raw IP address into your browser (1.1.1.1, for example). If that opens instantly while sites you reach by domain name crawl, suspicion points at DNS. If both are slow, DNS is innocent — the problem is your line, your Wi-Fi or your modem.
To rule those out, run the step-by-step diagnosis in why is my internet slow. And take a measurement before and after any change: run the speed test and write down download, upload and ping. Without numbers, "it feels faster" is usually a placebo.
Summary
- DNS is a phone book. It works at the start of a connection and does not set your speed.
- Changing DNS does not raise download or upload speed, and does not lower in-game ping.
- If your ISP's resolver is slow, pages can start loading sooner — the gain is measured in milliseconds, not megabits.
- Privacy and filtering are the strongest honest reasons to switch.
- Test with a raw IP first, then measure before and after so you know whether anything really changed.