CDN77 is a content delivery network (CDN).
Websites Using CDN77
What Is CDN77?
CDN77 is a content delivery network (CDN) that speeds up websites and applications by caching and serving their content from a global network of edge servers located close to end users. Like other CDNs, it sits between a website's origin server and its visitors, storing copies of static assets, images, scripts, stylesheets, downloads, and video, at points of presence around the world so that requests are answered from a nearby location rather than from a single distant data center. The result is faster load times, reduced origin load, and better resilience under traffic spikes.
CDN77 is a European-based provider that has operated in the content delivery space for over a decade. It is generally positioned as a performance-focused, developer-friendly CDN, with particular strength in media delivery and video streaming alongside standard web acceleration. While the CDN market is dominated by a handful of very large players, CDN77 is an established independent provider known for transparent pricing and a global edge footprint, and it is one of the recognizable names that technology-detection tools track.
It is helpful to be clear about what a CDN like CDN77 does and does not do. A CDN is not where your website is hosted in the traditional sense; your application and its database still live on an origin server or platform somewhere. The CDN is a delivery layer in front of that origin. It caches and distributes content, terminates TLS at the edge, and shields the origin from much of the traffic, but the authoritative source of your content remains your own hosting. This distinction matters for detection: a CDN's fingerprints appear in the network path and response headers that sit between the visitor and the origin, not in the application's own markup.
CDN77 is a paid, hosted service that you configure to front your existing site or assets, not a piece of software you install or a browser tool. You point a hostname at CDN77, or serve specific assets from a CDN77 domain, and the network handles edge caching and delivery from there. Because the edge is what actually answers requests, CDN77's presence shows up in the headers and asset domains a site returns.
How CDN77 Works
A CDN works by replicating content across many geographically distributed edge servers, collectively called points of presence (PoPs). When a visitor requests a page or an asset, the network routes them, typically via anycast or DNS-based routing, to the nearest available PoP. If that edge has a cached copy of the requested resource, it serves it immediately; this is a cache hit, and it is fast because the data travels a short distance. If the edge does not have the resource, it fetches it from the origin server, returns it to the visitor, and stores a copy for subsequent requests; this is a cache miss, which populates the cache for everyone who follows.
CDN77 follows this standard model and layers performance and media features on top. For static assets, it applies caching rules that determine how long content is held at the edge and when it is revalidated against the origin. For dynamic or frequently changing content, it offers cache controls and purging so that updates propagate quickly. The network terminates TLS at the edge, supports modern protocols, and compresses responses, all of which reduce latency for the end user.
A particular focus for CDN77 is media and video delivery. CDNs are essential for streaming because video is bandwidth-intensive and latency-sensitive; serving segments and manifests from a nearby edge keeps playback smooth and reduces buffering. CDN77's positioning emphasizes this use case alongside general web acceleration, large file downloads, and software distribution.
In practice, integrating a CDN like CDN77 takes one of two common shapes. In the first, you serve specific assets from a CDN-provided hostname, so image, script, and media URLs point at a CDN77 domain while the main page still loads from your origin. In the second, you put the CDN in front of your whole site by pointing your domain's DNS at the CDN, so all traffic flows through the edge and the origin is hidden behind it. Either way, the edge caches what it can, forwards what it must to the origin, and returns responses to the visitor enriched with CDN-specific headers that describe cache behavior and identify the network.
Because the CDN is the component answering requests at the edge, the most reliable evidence of its use is found exactly there: in the response headers and in the domains that assets are served from. That is what makes CDN77 detectable from the outside even though the underlying application is hosted elsewhere.
How to Tell if a Website Uses CDN77
Detecting a CDN comes down to inspecting the network path, the response headers, and the asset domains a site uses, because those are the layers the CDN actually touches. StackOptic analyzes these signals from the server side, and you can verify them with curl, DevTools, or a DNS lookup.
CDN-specific response headers. CDNs add headers that reveal their presence and cache behavior. With CDN77, look for a Server header value associated with the network and cache-status headers such as X-Cache (reporting HIT or MISS) or X-Cache-Status on responses. Headers indicating the network handled and cached the request are a strong signal.
CDN77 asset and CNAME domains. When a site serves assets through CDN77 or points a hostname at it, you can often see CDN77-associated domains in the asset URLs or in the DNS resolution chain. Running a DNS lookup on the site's hostname and seeing it resolve through a CDN77 CNAME or network is a dependable indicator.
Cache and edge behavior. Repeated requests that return cache-hit headers, along with response headers describing edge caching and age, indicate that an intermediary CDN, rather than a bare origin, is serving the content. Combined with CDN77-specific header values, this confirms the provider.
DNS and IP ranges. Because CDN77 routes traffic through its own infrastructure, the IP addresses a site resolves to belong to the CDN rather than the origin host. Tools that map IP ownership can attribute those addresses to the network.
Here is how to check each signal yourself:
| Method | What to do | What CDN77 reveals |
|---|---|---|
| curl -I | curl -I https://example.com | Server value and cache headers like X-Cache: HIT from the edge |
| Browser DevTools | Network tab, inspect response headers and asset request domains | CDN-specific headers and assets served from CDN77 hostnames |
| DNS lookup | dig or an online DNS tool on the hostname | CNAME or IP resolution pointing to CDN77 infrastructure |
| Wappalyzer | Run the extension on the live page | Identifies "CDN77" under CDN when headers expose it |
| BuiltWith | Look up the domain | Current and historical CDN usage including CDN77 |
A quick check is curl -sI https://example.com | grep -iE "server|x-cache". Cache-status headers from the edge, combined with a CDN77 Server value, point to the network. For broader methodology, see our guides on how to tell if a website uses Cloudflare or another CDN and what is a CDN and do you need one.
A crucial caveat applies to all CDN detection: a CDN deliberately masks the origin. By design, CDN77 stands in front of the real server, so the headers and IP addresses you observe describe the edge, not where the application is actually hosted. This means a CDN scan tells you about the delivery layer with reasonable confidence but says little about the origin host hidden behind it. Header values can also be customized or stripped, and some sites use CDN77 only for a subset of assets, so the main document may not carry the network's headers even though images or video do. Because no single header is guaranteed, combining the response headers, the asset domains, and a DNS lookup yields the most reliable verdict. If you specifically want to know where the underlying site is hosted rather than which CDN fronts it, our guide on how to find out where a website is hosted covers how to look past the edge.
Key Features
- Global edge network. Points of presence worldwide that cache and serve content close to end users for lower latency.
- Media and video delivery. Strong support for streaming, large files, and software distribution, a core focus of the platform.
- Flexible caching controls. Granular cache rules, fast purging, and revalidation so updates propagate quickly.
- TLS termination and modern protocols. Encryption and current HTTP protocols handled at the edge for performance and security.
- Origin shielding. The CDN absorbs traffic and protects the origin from load spikes and direct exposure.
- Real-time analytics. Traffic, cache-hit, and performance reporting through the provider's dashboard and APIs.
- Developer-friendly configuration. Straightforward setup, API access, and transparent, usage-based pricing.
Pros and Cons
Pros
- Faster global load times by serving cached content from nearby edges.
- Reduced origin load and better resilience during traffic surges.
- Particularly capable for media, video, and large-file delivery.
- Transparent pricing and an established, independent provider reputation.
Cons
- A smaller edge footprint and brand presence than the largest hyperscale CDNs.
- As with any CDN, it adds a layer to configure, debug, and pay for.
- Misconfigured caching can serve stale content or fail to cache effectively.
- Origin still requires its own hosting and protection; the CDN is a delivery layer, not a host.
CDN77 vs Alternatives
CDN77 competes with both hyperscale CDNs and other independent providers. The table below clarifies its positioning.
| Provider | Scale | Notable strength | Typical users |
|---|---|---|---|
| CDN77 | Mid-size, global | Media and video delivery, transparent pricing | Performance-focused sites, streaming, downloads |
| Cloudflare | Very large | Integrated security and free tier | Sites of all sizes wanting CDN plus protection |
| Akamai | Very large | Enterprise scale and reliability | Large enterprises and media at massive scale |
| Fastly | Large | Real-time configurability and edge logic | Developer-led, high-performance applications |
| Amazon CloudFront | Very large | Tight AWS integration | Teams already on AWS infrastructure |
If a site uses a different CDN, the same header and DNS inspection identifies it. To compare an independent CDN with an integrated security-and-CDN platform, see Cloudflare, which bundles delivery and protection in one service.
Use Cases
CDN77 is most valuable wherever fast, reliable global delivery matters. Media and streaming services use it to deliver video segments and manifests from nearby edges so playback stays smooth for a worldwide audience. Software and game companies use it to distribute large downloads and updates efficiently without hammering a single origin.
It also fits content-heavy websites with international visitors, ecommerce sites that need fast asset delivery to protect conversion rates, and any application that experiences traffic spikes and benefits from origin shielding. For technology research, detecting CDN77 on a site indicates a deliberate investment in delivery performance and, often, a media or download-oriented workload, which is useful context when profiling a site's infrastructure priorities.
Consider a few representative adopters. A video platform might route all of its streaming traffic through CDN77 so that viewers across different continents pull segments from a local edge rather than a central origin, dramatically reducing buffering. A software vendor might serve installer downloads and update packages from CDN77 to handle release-day surges without overloading its servers. A global ecommerce brand might front its product imagery and front-end assets with the CDN to keep pages fast for shoppers everywhere, knowing that page speed directly affects conversions. In each case the motivation is the same: move content closer to users and shield the origin from the load.
From a competitive-intelligence standpoint, spotting CDN77 tells you a site cares about delivery performance and has chosen an independent, media-capable CDN rather than defaulting to a bundled option. For vendors selling performance, streaming, or infrastructure services, and for analysts mapping how a market handles content delivery, that signal is meaningful, and identifying it automatically across many domains is far more efficient than inspecting headers site by site. Just remember that the CDN tells you about the edge, not the hidden origin.
Frequently Asked Questions
Is CDN77 a web host?
No. CDN77 is a content delivery network, a layer that caches and serves your content from global edge servers, not a place where your website is fundamentally hosted. Your application and database still live on an origin server or platform; CDN77 sits in front of that origin to accelerate delivery and absorb traffic. That is why detecting CDN77 reveals your delivery layer, while finding the actual host requires looking past the CDN to the origin behind it.
How do I tell if a site uses CDN77?
Inspect the response headers and DNS. Run curl -I https://example.com and look for a CDN77-associated Server value and cache-status headers like X-Cache: HIT. Run a DNS lookup to see whether the hostname resolves through CDN77 infrastructure, and check the Network tab for assets served from CDN77 domains. Tools like Wappalyzer and BuiltWith confirm CDN77 when the headers expose it. Combining these signals is the most reliable approach.
Does a CDN hide where a site is really hosted?
Yes, and that is partly the point. A CDN like CDN77 deliberately stands between visitors and the origin, so the IP addresses and headers you see belong to the CDN edge rather than the underlying host. This protects and accelerates the origin but also masks it. To find the true host, you have to look past the CDN, which is harder and sometimes not possible from the outside. Detecting the CDN itself, however, is usually straightforward from the headers.
What do the X-Cache HIT and MISS headers mean?
These headers report whether the edge served the response from its cache. X-Cache: HIT means the requested resource was already cached at the edge and served directly, which is fast. X-Cache: MISS means the edge did not have it cached and had to fetch it from the origin, then typically stored a copy for next time. Seeing these cache-status headers is strong evidence that a CDN, rather than a bare origin server, is delivering the content.
Why would a site choose CDN77 over a bigger CDN?
Teams choose CDN77 for its focus on media and video delivery, its transparent, usage-based pricing, and its reputation as a capable independent provider. For workloads heavy in streaming or large downloads, a performance-oriented CDN can be a deliberate fit. Larger CDNs offer bigger footprints and bundled security, but some organizations prefer a specialized, straightforwardly priced provider. Detecting which CDN a site uses reveals these kinds of infrastructure preferences.
Want to detect CDN77 and the full delivery and hosting stack behind any site? Try StackOptic at https://stackoptic.com.