Updated 21 October 2026
You can usually spot a private blog network (PBN) in about 15 minutes by checking four things: the domain’s history, its real organic traffic, who links to it and where it links out, and whether its content is written for readers or for links. One red flag proves little. Three or four together are a strong reason not to pay.
PBN links are often sold as “high authority” links at a good price. This guide shows what a PBN is, what Google says about sites like these, and a step-by-step check you can run before you buy any placement. It’s one part of the wider check in our guide to checking if a backlink is good before you buy it.
What is a private blog network?
A private blog network (PBN) is a group of websites controlled by one person or company and run mainly to pass links to other sites, often built on expired domains that still have links from their past life.
The “private” part is the point. The owner tries to make the sites look unrelated, so search engines don’t see them as one network. From the outside, a PBN site can look like an ordinary blog with a decent Domain Rating. That’s why it’s worth checking before you pay.
What does Google say about PBNs?
Google’s rules don’t use the term “PBN”, but they describe what PBNs do. Its spam policies list as link spam “creating low-value content primarily for the purposes of manipulating linking and ranking signals”, along with buying or selling links for ranking purposes. The same page describes expired domain abuse: buying an expired domain and repurposing it “primarily to manipulate search rankings by hosting content that provides little to no value to users.”
Google also says it can detect these sites automatically. When it announced its December 2022 link spam update, it said its SpamBrain system “can now detect both sites buying links, and sites used for the purpose of passing outgoing links.” The most common result is that the links are simply neutralized, so you’ve paid for something that does nothing. In worse cases, a site that relies on them can lose rankings or get a manual action.
The red flags, and how to check each one
| Red flag | How to check | Why it matters |
|---|---|---|
| The domain used to be something else | Look at old snapshots in the Wayback Machine | A former dentist’s site now posting about crypto and furniture is a classic expired-domain build |
| High DR, almost no organic traffic | Check estimated traffic and its trend in an SEO tool | Authority scores can be inflated with links. Real readers are much harder to fake |
| Traffic that spiked and collapsed | Look at the 12 to 24 month traffic chart | Often a sign the site was hit by a Google update |
| Outbound links to many unrelated businesses | Scan 10 recent posts and note who they link to | A site that exists to sell links links to everyone |
| Thin or generic content | Read three posts in full | Short, vague posts with no author, photos or real detail aren’t written for readers |
| No real owner | Check the About and Contact pages, and registration data in ICANN Lookup | Real publications say who runs them. Hidden ownership is common in networks |
| Look-alike sister sites | Compare footers, themes, author names and “write for us” pages across sites the seller offers | Shared templates and the same fake authors point to one owner |
| Links from other sites that look the same | Look at the site’s own backlinks in an SEO tool | Networks often link to each other to prop up their scores |
Some of these signs have innocent explanations. Domain registration privacy is normal, and plenty of small blogs have modest traffic. The pattern is what matters.
A 15-minute PBN check before you pay
- Get the exact domain first. If a seller won’t name the site until you’ve paid, walk away. You can’t check what you can’t see.
- Look at the domain’s past. Open the Wayback Machine and look at snapshots from a few years back. A sudden change of topic or language after a gap is a strong warning sign.
- Check real traffic, not just DR. Look up estimated organic traffic and its trend in an SEO tool. A DR 50 site with a few hundred visits a month is a common PBN profile.
- Read the latest posts. Are they written by named people with real knowledge? Or are they 600 words of filler, each with one commercial link?
- Count the outbound links. Note who the last 10 posts link to. Casino, loans, CBD and unrelated local businesses all on one “lifestyle” blog means the site sells to anyone.
- Look for the owner. A real business, editor or writer should be easy to find. An About page with stock photos and no names is a bad sign.
- Compare the seller’s other sites. If a seller offers 20 “different” blogs with the same theme, the same footer text or the same authors, you’re looking at a network.
- Check it’s indexed. Search Google for
site:followed by the domain. If few or no pages appear, Google may have dropped it.
A site that passes all eight steps still needs to fit your business and label your link honestly. The wider quality check covers both.
What doesn’t prove a site is a PBN
- Accepting guest posts. Many real publications take contributed articles. What matters is whether they edit, reject and label them.
- A “write for us” page. On its own, it just means the site takes pitches. A page that lists prices for casino and loan posts is a different story.
- Low DR. A small, real, local site with a loyal audience can be a better placement than a high-DR site with no readers.
- Some sponsored posts. Labeled sponsored content is a normal part of the web. Every single post being sponsored isn’t.
What if you already bought PBN links?
- Stop buying from that source.
- List the links. Note each URL, the date and what you paid.
- Ask for removal if you’re worried. Many sellers will remove a link on request.
- Only disavow if there’s a real problem. Google says to use its disavow tool only if you have a considerable number of spammy links and they “have caused a manual action, or likely will cause a manual action”, and warns that using it wrongly can harm your site.
- Watch Search Console. A manual action shows up in the Manual actions report.
How BuyLinks keeps PBNs out
We don’t take a seller’s word for any site. Only about 1 in 7 sites in our database passes our quality bar: 28,834 of the 199,791 publishers we track. Sites need real organic traffic, not just a high score, and we reject sites that sell to everyone, sites with collapsing traffic and sites Google has dropped. You can read how we grade sites, and see a sample plan with every site named and graded.
You see and approve every site before we buy anything. If a placement isn’t indexed within 30 days, or a link disappears in the 12 months after it goes live, our guarantee replaces it free.
Frequently asked questions
Are PBN links illegal?
No. Buying links isn’t a legal matter. It’s against Google’s spam policies when the links are meant to pass ranking credit, and the risk is to your search visibility and your money, not a legal penalty.
Do PBN links still work in 2026?
Some may pass value for a while, but Google says its systems can detect sites used to pass outgoing links, and the usual outcome is that those links are neutralized. You may pay for something that does nothing, with added risk if you rely on many of them.
Can a site with good traffic still be part of a PBN?
Yes, though it’s less common. Some networks include a few sites with real traffic to look legitimate. That’s why traffic alone isn’t enough: check the content, the outbound links and the owner too.
Is a site that sells guest posts automatically a PBN?
No. Many real magazines and blogs sell clearly labeled sponsored posts. A PBN exists mainly to pass links. A real publication exists for its readers and sells some space on the side.
Get your free plan
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