A current PageRank value gives you one observation from a link dataset. Its history lets you see how that value developed. OppAlerts shows Domain and Host PageRank separately, so first establish which measurement you're reading.
Enter a hostname or a list of up to 100. Full URLs are reduced to their hosts, and subdomains remain separate: blog.example.com and example.com are different lookups. A batch over the limit is rejected in full, with the counts shown. Split it before submitting again.
Domain uses the registrable-domain record. For each month, Host selects the larger available PageRank from the requested host and its www variant. It doesn't add them. That matters because the underlying graph began treating www hosts separately from bare hosts in January 2026.
Check whether the measurement explains the change
Here's an anonymized measured example. Through December 2025, the bare host had a value of 56 and www had 0. From January 2026, the values were 31 and 56. Looking only at the bare host would show a decline and miss the larger value now recorded for www.
The displayed Host value is 56 in both periods because it takes the larger available measurement each month. That explains how the chart handles this change. It doesn't prove everything about the website stayed the same; it shows why the bare-host value alone leaves part of the comparison out.
Check the scope and any missing observations when a prospect's history rises or falls. Charts begin in July 2017. The latest value is the most recent available monthly measurement, so it may not yet include a newly published link.
Then open the current site. Read recent articles, contact instructions, and contribution requirements. Those help you assess whether the publication fits your work. Link structure doesn't tell you who reads it, its editorial standards, or whether your article belongs there.
Use the history after you've found a plausible prospect. It adds context to a site you already have a reason to investigate. A favorable chart can't supply an audience or submission route the publication doesn't have.
Compare Domain and Host history with current publishing activity. Report the measured trend separately from your judgment of whether the site is suitable.
Related reading: deciding which prospects are worth the effort, PageRank history, how the measurements are produced, the Link Graph report.
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