A question about "unable to access this site"

the company network cannot access https://sourceforge.net/
has been confirmed:
1, the website has no forbidden access policy on the corporate network
2, the website is not walled
3, the mobile network can access
4, the domain name corresponds to IP: 216.105.38.13 can access

track as follows:

PS C:\Users\ydx\Desktop> tracert www.sourceforge.net

 30 
 www.sourceforge.net [216.105.38.13] :

  1     *        *        *     
  2     1 ms     1 ms     3 ms  10.0.0.2
  3     4 ms     3 ms     2 ms  58.63.60.81
  4    13 ms     2 ms     4 ms  113.98.80.2
  5     4 ms    12 ms    21 ms  183.56.31.73
  6    16 ms    10 ms     6 ms  117.176.37.59.broad.dg.gd.dynamic.163data.com.cn [59.37.176.117]
  7     7 ms     6 ms     6 ms  61.144.2.17
  8     4 ms     8 ms     *     202.97.91.98
  9     7 ms     8 ms     8 ms  202.97.91.137
 10   262 ms   268 ms   262 ms  202.97.58.218
 11   265 ms   262 ms   271 ms  202.97.49.166
 12     *      271 ms   271 ms  218.30.54.142
 13   272 ms   271 ms   304 ms  los-edge-08.inet.qwest.net [67.14.22.198]
 14   266 ms   267 ms   264 ms  65-126-18-126.dia.static.qwest.net [65.126.18.126]
 15   264 ms   268 ms   275 ms  br05-te0-0-1-6.lwdc.americanis.net [207.158.62.109]
 16     *      272 ms   319 ms  ar06-te13-3.lwdc.americanis.net [209.216.192.58]
 17   306 ms   283 ms   273 ms  216.105.38.13
 18     *      296 ms   279 ms  216.105.38.13
 19   273 ms   267 ms   270 ms  216.105.38.13

what is the reason why the website cannot be accessed properly?

Mar.11,2021

  1. Mobile networks are definitely different from corporate networks, unless you use Wifi to connect
  2. ip can be accessed and not counted by the wall under the same condition
  3. is the DNS distributed by the operator or set up by the operator? Then there's a problem here. It is recommended that you directly specify (DNS of DHCP) Ali's public DNS 223.5.5.5 and 223.6.6.6 , or short name upstart 1.1.1.1 and 1.0.0.1 .
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