On 31/03/2022 23:15, Bill Woodcock wrote:
…in a run-of-the-mill web hoster?
This is really a question specifically for folks with web-site-hosting businesses.
If you had, say, ten million web site customers, each with their own unique domain name, how many IPv4 addresses would you think was a reasonable number to host those on? HTTP name-based virtual-hosting means that you could, hypothetically, pile all ten million into a single IP address. At the other end of the spectrum, you could chew up ten million IPv4 addresses, giving a unique one to each customer. Presumably the actual practice lies somewhere in-between. But what ratio do people in that business think is reasonable? 10:1? 100:1? 1,000:1?
Not exactly in the web hosting side of the business but I do run a website to IP survey for the gTLDs, the new gTLDs and some ccTLDs each month that covers approximately 248.3 million domain names. It is a complex question because the use of IP addresses for websites has been changing. Some of the IPs with large numbers of websites are actually registrar/hoster holding page websites, sales or Pay Per Click parking, DDoS protection, redirectors or load balancers. There is also the dedicated versus shared hosting issue which sees large numbers of websites on shared hosting and fewer on dedicated hosting with single IPs. Virtual hosting also complicates things because it is not unusal to see multiple domain names in different TLDs (eg: .COM and .ccTLD) pointing to the same IP. There were 12,300,576 distinct IP addresses (IPv4) in the March 2022 survey. That also included a small number of private IPs, bogons and non-routed IPs. These are the counts for the top 20 IPs. 34.102.136.180 26308511 3.33.152.147 8897990 15.197.142.173 8896940 34.117.168.233 5920870 198.185.159.144 3614480 198.185.159.145 3601589 198.49.23.144 3600433 198.49.23.145 3600334 198.54.117.212 3143453 198.54.117.215 3143451 198.54.117.218 3143448 198.54.117.211 3143447 198.54.117.216 3143446 198.54.117.210 3143445 198.54.117.217 3143444 34.98.99.30 2929772 188.114.97.7 2708015 188.114.96.7 2708013 23.227.38.74 2535730 35.186.238.101 2152424 Some of those are load balancers/redirectors/holding/sales/PPC/DDoS protection IPs. The number of IPs with a single website was 6,943,207. The average number of sites per IP was 24.3414. The limitations are that despite the large number of domain names in the survey, it is not a complete survey of all TLDs (some ccTLDs are not covered). Even though websites may have IPs, that does not necessarily mean that there is an webserver running on the IP. (That's getting into Web Usage measurement which determines how websites are being used or not used.) Regards...jmcc -- ********************************************************** John McCormac * e-mail: jmcc@hosterstats.com MC2 * web: http://www.hosterstats.com/ 22 Viewmount * Domain Registrations Statistics Waterford * Domnomics - the business of domain names Ireland * https://amzn.to/2OPtEIO IE * Skype: hosterstats.com ********************************************************** -- This email has been checked for viruses by AVG. https://www.avg.com