根据 获取微信服务器 IP 地址

这里的指引https://developers.weixin.qq.com/doc/offiaccount/Basic_Information/Get_the_WeChat_server_IP_address.html

获取微信callback IP地址、获取微信 API 接口 IP地址：

{"ip_list":["106.55.206.146","106.55.206.211","106.55.207.148","106.55.207.31","118.126.124.186","118.126.124.246","119.29.180.49","119.29.9.101","124.223.151.119","129.226.105.242","162.62.80.57","162.62.80.8","162.62.81.123","175.24.211.142","175.24.211.157","175.24.211.198","175.24.211.31","175.24.211.4","175.24.212.10","175.24.212.185","175.24.212.195","175.24.213.149","175.24.214.150","175.24.214.222","175.27.64.215","175.27.65.216","42.192.0.152","42.192.0.224","42.192.6.57","43.132.112.30","43.132.141.238","43.137.147.169","43.143.52.12","43.143.59.119","81.69.101.193","81.69.101.225","81.69.101.233","81.69.101.237","81.69.103.129","81.69.103.147","81.69.103.163","81.69.103.205","81.69.103.236","81.69.103.238","81.69.103.37","81.69.103.74","81.71.140.59","81.71.19.101"]}

{"ip_list":["101.89.47.18","101.91.34.103","101.91.37.13","109.244.129.223","109.244.145.152","109.244.184.250","112.53.42.235","112.60.20.154","112.65.193.153","112.90.80.215","116.128.170.42","116.128.184.169","117.144.228.18","117.144.228.62","119.147.6.203","119.147.6.237","120.232.65.161","157.148.36.94","157.255.218.109","175.27.18.18","175.27.5.221","183.2.143.222","203.205.239.82","203.205.239.94","221.181.99.40","81.69.216.43"]}

配置到服务器白名单上，结果发现小程序访问后台不通。

取消服务器白名单，发现实际收到的小程序侧地址是220.152.145.208，根本不在上述地址中。

请问究竟怎样获取到正确的小程序访问业务服务器所使用的IP列表？

还是说这个指引以前能用，现在不行了？