Is Your Domain Being Blocked by a Country?
Kirt's Cogitations™ #275 test of - RF CafeCA Technologies "App Synthetic Monitor" for - RF CafeRecently, a company based in China contacted me about advertising on RF Cafe. After doing a lot of up-front work for them creating advertising materials (Highlighted Ad, 160x600-px banner graphic, etc.), the representative informed me that he cannot access the domain from his location. It is really difficult to conduct business when the customer cannot review your work, so at least for now, I am going to pass on the opportunity. The obvious question that arises from the experience is whether is being blocked by China, and how do I find out?

Fortunately, a few options exist with websites that will perform the check for you by pinging your URL from servers within multiple countries. Some, such as, tests from inside China using servers in Beijing, Shenzhen, Inner Mongolia, Heilongjiang Province, and Yunnan Province. looks good from China according to this service, so I wonder why the aforementioned China-based company cannot reach

Wanting to try at least one other domain resolution service to make certain access from China was possible, I used CA Technologies' "App Synthetic Monitor." It tests from numerous countries. The free version checks from servers in China, the UK, Germany, Italy, Spain, Sweden, Poland, Switzerland, and the U.S. looks good from all locations. There is a subscription service that monitors access status from up to 48 countries.

For kicks, I typed in a few domains into to see who might be blocked. News websites are the best candidates for trial since China is known to block sources considered generally unfavorable to their policies. is blocked - no surprise there. is also blocked, as is (Wall Street Journal). Those having access include,, (very surprised),,, and Testing some U.S. government websites produced varied results. is banned, along with and (LOL).,,,, and are allowed. Go figure.

If your company markets products and/or services to countries outside your homeland, you should test access occasionally to make sure you are not being blocked. If you are blocked, I have no idea what to do about it, but at least you will know.

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These original Kirt's Cogitations™ may be reproduced (no more than 5, please) provided proper credit is given to me, Kirt Blattenberger.

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   Cog·i·ta·tion [koj-i-tey'-shun] – noun: Concerted thought or reflection; meditation; contemplation.
   Kirt [kert] – proper noun: RF Cafe webmaster.

These items are an archive of past Topical Smorgasbord items that have appeared on the RF Cafe homepage. In keeping with the "cafe" genre, these tidbits of information are truly a smorgasbord of topics. They all pertain to topics that are related to the general engineering and science theme of RF Cafe. Note: There is also a huge collection of my 'Factoids' (aka 'Kirt's Cogitations') that might interest you as well.

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Posted June 18, 2016