How to check ASN diversity across paid niche edits

A paid niche edit is not independent just because it appears on a different domain. If many placements resolve to the same hosting infrastructure, your list may be less diverse than the vendor’s domain count suggests.

An ASN, or Autonomous System Number, identifies a network that announces routes on the internet. Comparing the ASNs behind placement URLs can help reveal concentration. It cannot, by itself, prove common ownership, editorial control or a private blog network. Treat it as evidence to investigate alongside the actual links, host data and subnet patterns.

Here is a practical way to audit that footprint with bklink, then decide what the findings do and do not support.

1. Gather the placement URLs

Start with the URLs the vendor says contain your niche edits. Use the live article URLs where possible, rather than only a list of publication homepages. Keep each vendor’s placements in a separate file or audit. Mixing vendors makes it harder to tell whose delivery has a concentrated footprint.

bklink accepts a domain scan or uploads in CSV, PDF and spreadsheet formats. If your records are already in a legacy report, you can use that as a starting point; the useful step is to make sure the placement URLs are identifiable and attributable to the right vendor.

2. Audit each vendor’s list on its own

Run each vendor’s file separately. The audit checks links and reports hosting details, including host, IP and ASN, as well as follow state. It also detects dead URLs and link rot, and provides agency or vendor attribution for audited placements.

Do not treat a URL that no longer resolves as evidence of hosting diversity. First separate live placements from dead ones. A link that has disappeared cannot contribute current value, and its old host may no longer describe the infrastructure serving the placement today.

bklink uses a pay-per-use prepaid wallet rather than a recurring subscription. New accounts receive $1 in credit without adding a card; wallet top-ups have a $10 minimum. Check the current audit scope and cost before running a larger list.

3. Compare ASNs, then look below the domain count

Count the distinct ASNs among the resolvable placement URLs and compare that number with the number of live placements. A list with many domains but few ASNs deserves a closer look. Then check whether those placements also fall into shared-IP or subnet C-block clusters. Multiple domains on one IP or a tight subnet cluster can expose concentration that a domain count hides.

Do not reduce the finding to “same ASN equals same network.” Large hosting providers can serve unrelated publishers, and a reseller may place separate customers on infrastructure associated with one upstream network. A CDN can also obscure the origin server. ASN overlap is a screening signal, not a verdict on editorial independence or site quality.

Look for combinations: repeated ASN, repeated IP or subnet, and a high share of the vendor’s placements concentrated in a small number of clusters. Then inspect the affected URLs and ask the vendor for an explanation. A broad footprint across networks is not proof that placements are worthwhile, either; the links still need to be live, relevant and worth their cost.

4. Put the finding in context

Record the denominator as well as the cluster count. For example, say how many placements were submitted, how many were resolvable, how many were live, and how many shared infrastructure. That is more useful than saying only that a list has “many ASNs.” If a portion of the list sits behind shared hosting, state the proportion and name the observed pattern without claiming it proves a PBN.

bklink estimates market value for audited placements. Use that as an additional comparison with what you paid, not as a substitute for checking relevance, traffic or business outcomes. A low estimate or a shared-host cluster should prompt questions; neither alone establishes intent.

For more context on why domains can hide a concentrated footprint, see our earlier guide to shared-hosting clusters in link placements. It is a useful reminder to examine infrastructure as well as the visible publication list.

5. Make the decision vendor by vendor

Use the audit to create a short record for each vendor: submitted placements, live and followed links, dead URLs, distinct ASNs, notable shared-IP or subnet clusters, and estimated placement value. Compare vendors on the same basis. If one delivery is concentrated, ask for replacement placements or a clear account of the hosting pattern before you renew. If a link is dead, ask what remedy applies under your agreement.

Keep the conclusion narrow. An ASN backlink footprint tells you where the audited sites appear to sit in network terms at the time of the check. It does not certify a placement as independent, safe or valuable. The point of a niche edit audit is to replace a vendor’s domain count with evidence you can question, compare and use before the next invoice.