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Help Center 
Troubleshooting Problems with Ad Serving
How do I troubleshoot my ISP's nameservers?
The DNS servers for your local Internet service provider can block access to our ad servers or they do not resolve our domain name to the correct IP addresses.What is a nameserver?
Nameservers are used by ISPs (eg: Comcast, Time Warner, AOL, Yahoo, AT&T, etc.) to map hostnames (eg: www.adspeed.com) to IP addresses (eg: 127.0.0.1). If a nameserver server has problems, users of these servers will experience connection problems to any/many websites. In Firefox, the error message is normally "Server Not Found". When this happens, visitors using another working nameserver would be able to access the websites normally.Problem Identification
The following 2 images are the same file but use 2 different methods for access, one uses hostname and one uses a direct IP address.
Standard (Hostname)
IP Addresses
If you can see all 3 images, your ISP's DNS servers are working properly. If you can see only the two bottom images with direct IP addresses, you are having a DNS problem. Please continue with the verification process below.
Verification
To verify that your ISP nameservers are causing accessibility problems, you could ping our servers or perform a nameserver lookup on g.adspeed.net. To do this in Windows:- Windows: Click on Start/Run and type "cmd"
- Mac OS: Open the Terminal application (Finder/Utilities/Terminal)
- When the command-line window appears, type "ping g.adspeed.net"
- And perform a lookup of hostname "nslookup g.adspeed.net"
Solution
If the ping/nslookup results contain any error message or show some packet loss, you should contact your ISP and ask if they have or know of any issue with their nameservers or network. Or you can try to use another DNS server, we hear great things about OpenDNSOther Articles in Problems with Ad Serving
- Restrictions Failed
- No Ad Found In Rotation
- Invalid Ad Type
- Why do I see "Object Expected" error in Internet Explorer?
- Why isn't one of my ads showing?
- Why don't ads show? What is the system status?
- Why doesn't the status bar change?
- What does "Click to activate and use this control" message mean?
Cannot find an answer for your question? Ask our Customer Care team
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