要判断访问者是否是必应爬虫机器人,最靠谱方法还是要看访问者的IP地址,以下是必应爬虫机器人的IP地址段:

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    {
      "ipv4Prefix": "157.55.39.0/24"
    },
    {
      "ipv4Prefix": "207.46.13.0/24"
    },
    {
      "ipv4Prefix": "40.77.167.0/24"
    },
    {
      "ipv4Prefix": "13.66.139.0/24"
    },
    {
      "ipv4Prefix": "13.66.144.0/24"
    },
    {
      "ipv4Prefix": "52.167.144.0/24"
    },
    {
      "ipv4Prefix": "13.67.10.16/28"
    },
    {
      "ipv4Prefix": "13.69.66.240/28"
    },
    {
      "ipv4Prefix": "13.71.172.224/28"
    },
    {
      "ipv4Prefix": "139.217.52.0/28"
    },
    {
      "ipv4Prefix": "191.233.204.224/28"
    },
    {
      "ipv4Prefix": "20.36.108.32/28"
    },
    {
      "ipv4Prefix": "20.43.120.16/28"
    },
    {
      "ipv4Prefix": "40.79.131.208/28"
    },
    {
      "ipv4Prefix": "40.79.186.176/28"
    },
    {
      "ipv4Prefix": "52.231.148.0/28"
    },
    {
      "ipv4Prefix": "20.79.107.240/28"
    },
    {
      "ipv4Prefix": "51.105.67.0/28"
    },
    {
      "ipv4Prefix": "20.125.163.80/28"
    },
    {
      "ipv4Prefix": "40.77.188.0/22"
    },
    {
      "ipv4Prefix": "65.55.210.0/24"
    },
    {
      "ipv4Prefix": "199.30.24.0/23"
    },
    {
      "ipv4Prefix": "40.77.202.0/24"
    },
    {
      "ipv4Prefix": "40.77.139.0/25"
    },
    {
      "ipv4Prefix": "20.74.197.0/28"
    },
    {
      "ipv4Prefix": "20.15.133.160/27"
    },
    {
      "ipv4Prefix": "40.77.177.0/24"
    },
    {
      "ipv4Prefix": "40.77.178.0/23"
    }

要取得最新的必应爬虫机器的IP,可访问必应官方的必应爬虫IP地址接口:

https://www.bing.com/toolbox/bingbot.json