Bulk DA PA & Backlink Checker
Audit up to 10 domains or URLs simultaneously: Domain Authority, Page Authority, Total Backlinks, Quality Ratio, MozRank, and Spam Score.
Understanding Domain Authority (DA) and Page Authority (PA)
Domain Authority (DA) and Page Authority (PA) are algorithmic search engine ranking metrics developed by Moz to predict a website or webpage’s likelihood of ranking in search engine results pages (SERPs). Both scores operate on a 1-to-100 logarithmic scale, meaning advancing a score from 20 to 30 is considerably easier than advancing from 70 to 80.
While Google does not use Moz Domain Authority as a direct organic ranking signal—relying instead on its proprietary PageRank algorithm and AI-driven quality systems—DA and PA serve as industry-standard benchmarks for estimating relative competitive strength, backlink profile maturity, and overall search footprint.
| Metric | Evaluation Scope | Scale | Primary Drivers | Strategic Purpose |
|---|---|---|---|---|
| Domain Authority (DA) | Entire root domain or subdomain | 1 – 100 (Logarithmic) | Unique referring root domains, total inbound link equity, trust graph proximity | Competitor benchmarking, guest post evaluation, domain acquisition analysis |
| Page Authority (PA) | Individual target URL | 1 – 100 (Logarithmic) | Direct inbound backlinks to the exact URL, internal link architecture, anchor text relevance | Keyword difficulty assessment, landing page ranking audits, internal link distribution |
| MozRank / Moz Score | Link popularity score | 0.0 – 10.0 (Logarithmic) | Global link graph popularity, weighted importance of linking nodes | Mathematical raw link equity measurement comparable to historical Google PageRank |
| Spam Score | Subdomain penalty risk | 0% – 100% (Percentage) | 27 common signals correlated with penalized or banned websites | Link profile cleanup, toxic backlink audits, disavow file preparation |
Moz Score vs. Spam Score: Decoding Link Quality Signals
Evaluating an authority metric in isolation can lead to misinformed SEO decisions. A website might boast millions of backlinks but suffer from an elevated Spam Score due to automated link farming or low-quality directory syndication. Conversely, an authoritative technical blog might possess a modest link count with an impeccable, low-risk link graph.
1. The 27 Spam Score Factors
Moz’s Spam Score models 27 correlation signals shared by websites that have experienced manual penalties or algorithmic demotions by Google. Key signals evaluated include:
- Large backlink volume from few referring domains: Indicates repetitive site-wide footers, blogrolls, or paid widget syndication.
- Skewed anchor text distribution: Excessive exact-match commercial keywords versus branded terms trigger over-optimization filters.
- Uncommon TLD extensions: Cheap top-level domains frequently abused by spam networks (.xyz, .top, .click, .loan) receive higher baseline spam scrutiny.
- Absence of HTTPS / SSL Certificates: Modern secure web standards correlate with legitimate webmasters investing in technical infrastructure.
- Extreme ratio of external links to internal content: Thin sites functioning solely as link farms or link exchange networks.
2. Spam Score Risk Tiers
- 1% – 30% (Low Risk): Pristine backlink profile. Natural organic link graph suitable for digital PR, outreach, and partnerships.
- 31% – 60% (Medium Risk): Moderate warning. Manual audit recommended to examine anchor text velocity and eliminate disreputable scraping links.
- 61% – 100% (High Risk): Severe danger. The domain exhibits patterns consistent with penalized PBNs (Private Blog Networks) or automated spam schemes.
Total Backlinks vs. Quality Backlinks & Referring Domains
One of the most common misunderstandings in technical SEO is treating raw backlink counts as the primary measure of link equity. In modern search engine algorithms, referring root domains and DoFollow link quality far outweigh aggregate link quantities.
If Domain A receives 50,000 links from a single external forum sidebar, search engines treat those 50,000 instances as originating from one single source, with rapidly diminishing link value after the first crawl. Conversely, if Domain B receives 250 editorial DoFollow links across 250 distinct authoritative engineering websites, Domain B captures significantly greater link diversity and search authority.
How to Conduct a Bulk SEO Authority Audit (Step-by-Step)
- Collect Target URLs: Gather up to 10 URLs or domains representing competitors, backlink outreach prospects, or your own digital properties.
- Paste Into the Input Console: Enter one URL per line into the input area. You may input root domains (e.g.,
example.com) or specific deep pages (e.g.,example.com/blog/article-slug/). - Execute the Audit: Click Run Authority & Backlink Audit. The diagnostic engine queries DNS, evaluates link graph parameters, and generates real-time authority scores.
- Review the Executive Summary: Check the 4 top cards displaying Batch Average DA, Average PA, Combined Inbound Links, and Overall Spam Profile.
- Inspect the Comparison Matrix: Sort by Domain Authority, Backlinks, or Spam Score to prioritize the strongest link targets or identify toxic outliers.
- Export & Share: Click Export CSV to download a complete spreadsheet or Copy Markdown to share formatted tables in technical documentation or Slack.
SEO Authority Benchmark Reference Matrix
| Authority Tier | DA Range | Typical Referring Domains | Organic Competitive Potential | Link Building Target Priority |
|---|---|---|---|---|
| Tier 1: Global Giants | 85 – 100 | 100,000+ | Dominates broad head terms, instant indexing, massive crawl allocation | Aspirational / Brand Mentions |
| Tier 2: Established Industry Leaders | 60 – 84 | 2,500 – 100,000 | Ranks competitive commercial queries; strong topical authority | High Priority Editorial Target |
| Tier 3: Niche Authorities | 40 – 59 | 300 – 2,500 | Ranks long-tail and medium-competition niche keywords consistently | Prime Outreach & Guest Post Target |
| Tier 4: Growing Websites | 20 – 39 | 50 – 300 | Ranks specific low-competition terms; building topical depth | Peer Exchange & Collaborative PR |
| Tier 5: New / Unindexed Sites | 1 – 19 | < 50 | Requires foundational links, technical SEO fixes, and content velocity | Foundational Directory & Social Proof |
Frequently Asked Questions (FAQ)
How often is Domain Authority updated?
Domain Authority calculations depend on underlying web index updates. Major link graph providers refresh their web crawling index every 30 to 45 days. Fluctuations of 1 to 3 points are normal as the global web graph expands and links across the internet are added or removed.
Can a low DA website outrank a high DA website in Google?
Yes. Domain Authority measures aggregate domain strength, but Google evaluates individual page relevance, search intent satisfaction, E-E-A-T credentials, and targeted internal link signals. A website with a DA of 35 that produces an exceptional, comprehensive technical answer can frequently outrank a general DA 80 portal that offers only generic or thin coverage.
What is the difference between DoFollow and NoFollow links?
A standard hyperlink is “DoFollow,” meaning search engine crawlers pass link equity (PageRank) to the destination. Hyperlinks with rel="nofollow", rel="sponsored", or rel="ugc" instruct search engines to treat the link as a hint rather than a direct endorsement. A healthy link profile typically maintains 65% to 85% DoFollow links.
How do I reduce my website’s Spam Score?
To reduce an elevated Spam Score, conduct a full link audit using Google Search Console, submit a disavow file for spammy or automated scraper networks, resolve domain redirect chains, ensure valid SSL certificates are installed, and avoid participating in automated link schemes.