List of Yandex robots and User-Agents for website optimization

Optimization of a website includes tracking of the regularity of attendance of a website by search robots by analyzing attendance logs on the server level. PHP uses $_SERVER["HTTP_USER_AGENT"]. We determine the moment starting from which the search engine can take into account optimized site content and start tracing the search results.

The list of Yandex robots

Yandex robots are classified according to the tasks they perform:

• Yandex/1.01.001 (compatible; Win16; I) text indexing
• Yandex/1.01.001 (compatible; Win16; P) images indexing
• Yandex/1.01.001 (compatible; Win16; H) detection of mirror sites
• Yandex/1.02.000 (compatible; Win16; F) favicons indexing
• Yandex/1.03.003 (compatible; Win16; D) indexing of a site page on request
• Yandex/1.03.000 (compatible; Win16; M) indexing of a page by “found words” link
• YaDirectBot/1.0 (compatible; Win16; I) indexing of a page connected to Yandex.Direct
• YandexBlog/0.99.101 (compatible; DOS3.30; Mozilla/5.0; B; robot) — indexing of blogs and comments

Yandex does not disclose the list of IP addresses of robots.

The list of Yandex User-Agents

User-Agents of Yandex evaluate the availability of a site or a document which is referred to by a link in the corresponding service.

• Yandex/2.01.000 (compatible; Win16; Dyatel; C) — checks the availability of links from Yandex.Catalogue. The site is removed from publication if it has been unavailable for several days and appears again as soon as it becomes available.
• Yandex/2.01.000 (compatible; Win16; Dyatel; Z) —checks the availability of links from Yandex.Bookmarks. Unavailable links are marked in gray.
• Yandex/2.01.000 (compatible; Win16; Dyatel; D) —checks the availability of links from advertisements for Yandex.Direct before moderation.
• Yandex/2.01.000 (compatible; Win16; Dyatel; N) checks the availability of links for Yandex.News, forms reports for content managers and informs about possible problems of partners-providers of news.

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TAGS
search engine optimization, yandex robots, yandex user agents, site indexing, link indexing, site optimization