Do search engines support

Do search engines support the ___ syntax?

Do search engines support sites:domain.com?

Question: is the site search syntax e.g. site:domain.com was supported by various search engines?

Google: Search operators - Search Help

• support site:domain.com: yes [Last visited: 2022-02-13]
• support site:sub.domain.com: yes(example)

Yahoo: Yahoo Search Engine Shortcuts

• support site:domain.com: yes the search result also contains the URLs matches sub.domain.com e.g. the search result of site:yahoo.com also contains hk.yahoo.com, news.yahoo.com and so on. [Last visited: 2022-02-13]
• support site:sub.domain.com: yes

百度一下

• support site:domain.com: yes also contains the URLs matches sub.domain.com
• support site:sub.domain.com: yes

Bing

• support site:domain.com: yes also contains the URLs matches sub.domain.com
• support site:sub.domain.com: yes

Gigablast - An Alternative Open Source Search Engine

• support site:domain.com: yes also contains the URLs matches sub.domain.com
• support site:sub.domain.com: yes

Ask.com - What's Your Question?

• support site:domain.com: yes also contains the URLs matches sub.domain.com
• support site:sub.domain.com: yes

Yandex 俄國搜尋引擎

• support site:domain.com or https://yandex.ru/yandsearch?surl=netload.biz&text=<keyword>: yes: yes also contains the URLs matches sub.domain.com
• support site:sub.domain.com: yes

DuckDuckGo — Privacy, simplified. [Last visited: 2018-07-10]

• support site:domain.com <keyword> (1) also contains the URLs matches sub.domain.com (2) Number of indexing page is less than expected. [Last visited: 2022-02-13]
• support site:sub.domain.com <keyword>: yes

Do search engines support -sites:domain.com?

To exclude the specific websites from the result of search engine. [Last visited: 2022-02-13]

• Google: support -sites:domain.com
• Yahoo奇摩 support -sites:domain.com
• Bing support -sites:domain.com
• DuckDuckGo support -sites:domain.com