merckmanuals.com
Link authority for merckmanuals.com (registrable domain: merckmanuals.com) from the Common Crawl web graph: PageRank and harmonic centrality history since 2017, current scores, and the site's top backlink sources.
Web-graph authority (0-100)
Domain scores measure merckmanuals.com as a whole: every subdomain's links rolled up into one node of Common Crawl's domain-level web graph. Host scores measure the exact hostname merckmanuals.com. WWW scores cover the www variant of that hostname, which the graph tracks as its own entry since January 2026 (before that, www and bare host were merged). A big gap between domain and host usually means the domain's authority lives on other subdomains. PageRank is link-endorsement authority: how much weight the sites linking here carry themselves. Harmonic centrality measures reach: how close this site sits to the rest of the web when following links, which favors broadly connected sites over ones boosted by a few heavy linkers. All are normalized 0 to 100 within each crawl snapshot; a dash means that series does not exist for this site.
Homepage
What merckmanuals.com presents on its own homepage: the page title, description, and the social share markup it publishes. Pulled from https://merckmanuals.com.
| Title | The Trusted Provider of Medical Information since 1899 |
|---|---|
| Description | The Merck Manuals are the global standard in medical reference for Doctors, Students & Consumers - since 1899. |
| OG Title | The Trusted Provider of Medical Information since 1899 |
| OG Site Name | Merck Manuals |
| Twitter Title | The Trusted Provider of Medical Information since 1899 |
| Twitter Card | summary_large_image |
Social accounts and contact points
Where this site maintains a presence and every reachable route its homepage exposes: social accounts, contact pages, addresses, and content feeds.
| MerckManualUS | |
| X | merckmanualpro |
| Youtube | UCWWp8kQL3G4hcOo5G-mqjTg (channel) |
| Contact pages | https://merckmanuals.com/professional/content/contact-us |
|---|
Structured data (JSON-LD)
The schema.org markup this homepage publishes: the machine-readable identity search engines and AI systems read. Types found: BreadcrumbList, Organization, WebSite.
JSON-LD block (244 bytes)
{
"@context": "https://schema.org",
"@type": "BreadcrumbList",
"itemListElement": [
{
"@type": "ListItem",
"item": {
"@type": "Thing",
"@id": "https://www.merckmanuals.com/",
"name": "Home"
},
"position": 1
}
]
}JSON-LD block (1,667 bytes)
{
"@context": "https://schema.org",
"@type": "Organization",
"name": "Merck Manuals",
"description": "At Merck (known as MSD outside the United States and Canada) we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. For more than 130 years, we have brought hope to humanity through the development of important medicines and vaccines. We aspire to be the premier research-intensive biopharmaceutical company in the world – and today, we are at the forefront of research to deliver innovative health solutions that advance the prevention and treatment of diseases in people and animals.First published in 1899 as a small reference book for physicians and pharmacists, The Merck Manual grew in size and scope to become one of the world's most widely used comprehensive medical resources for professionals and consumers. As The Manual evolved, it continually expanded the reach and depth of its offerings to reflect the mission of providing the best medical information to a wide cross-section of users, including medical professionals and students, veterinarians and veterinary students, and consumers. Learn more about our commitment toGlobal Medical Knowledge.",
"sameAs": [
"https://www.facebook.com/MerckManualHomeUS",
"https://www.facebook.com/MerckManualUS/",
"https://x.com/MerckManualHome",
"https://x.com/merckmanualpro",
"https://www.youtube.com/channel/UCWWp8kQL3G4hcOo5G-mqjTg"
],
"url": "https://www.merckmanuals.com",
"logo": "https://www.merckmanuals.com/_next/image?url=https://edge.sitecorecloud.io/mmanual-ssq1ci05/media/manual/brand-logos/mm_logo.svg&w=64&q=75"
}JSON-LD block (124 bytes)
{
"@context": "https://schema.org",
"@type": "WebSite",
"name": "Merck Manuals",
"url": "https://www.merckmanuals.com"
}Authority over time
Every Common Crawl web-graph release since 2017, roughly quarterly. The domain series goes back to 2017; Common Crawl only began publishing the host-level graph in 2020, so host lines start there. Click a legend entry to show or hide that line. Flat lines are normal for established sites; watch for sustained rises or drops, which track real gains or losses in who links here.
A note on www: through the end of 2025 the source web graph merged www and non-www hostnames into the bare name, so one host line covers both. Starting in January 2026 the graph splits them into separate entries, which is why www can carry its own scores going forward.
Backlink counts
Unique linking domains seen in Common Crawl's link graphs. This is a different dataset than the 0-100 authority scores above: these are raw counts, host-level for merckmanuals.com and domain-level for merckmanuals.com with all its subdomains combined. Common Crawl covers a large sample of the web, not all of it, so treat counts as comparable between sites rather than absolute totals.
Top backlinks in the domain graph
Common Crawl publishes two link graphs. The DOMAIN graph connects whole domains: every link from any page of one domain to any page of another. This table shows the highest-authority domains linking to merckmanuals.com (including its subdomains), ranked by the linker's PageRank. The table shows the top 1,000; the download carries the full stored list (up to 10,000 linkers) as JSON. Click a linker for its own site profile.
Top backlinks in the host graph
The HOST graph connects exact hostnames, so subdomains count separately. This table shows the highest-authority hosts linking to merckmanuals.com specifically, ranked by the linker's PageRank. The table shows the top 80; the download carries the full stored list (up to 10,000 linkers) as JSON. Click a linker for its own site profile.