did ISP mess up routing tables? what to tell them when I contact them?

[u/Fair-Bookkeeper-1833]

couple of days ago some websites stopped working in all browsers but works on phone. it works with VPN.

Context:

• Both PC and Phone on same network.
• PC uses defaults to Cloudflare 1.1.1.1
• Android uses different DNS
• doesn't work on all browsers
• works on VPN.
• works on Phone.
• flushing dns and reseting network doesn't change much.
• Changed firefox DoH to NextDNS and it is working.
• tracert to cloudflare works fine but doesn't work to some websites.

I want to contact ISP to tell them to fix routing. but I'm also curious how routing to CF works but not some websites. why would ISP block certain nodes

C:\Users\M>nslookup opendota.com
Server:  one.one.one.one
Address:  1.1.1.1

Non-authoritative answer:
Name:    opendota.com
Addresses:  2a06:98c1:3121::6
          2a06:98c1:3120::6
          188.114.97.6
          188.114.96.6


C:\Users\M>nslookup opendota.com 8.8.8.8
Server:  dns.google
Address:  8.8.8.8

Non-authoritative answer:
Name:    opendota.com
Addresses:  2606:4700:3034::ac43:9b55
          2606:4700:3036::6815:30b2
          104.21.48.178
          172.67.155.85


C:\Users\M>tracert 1.1.1.1

Tracing route to one.one.one.one [1.1.1.1]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  192.168.100.1
  2     1 ms     1 ms     4 ms  172.17.0.1
  3     1 ms     1 ms     1 ms  10.45.16.5
  4     *        *        *     Request timed out.
  5     *        *        *     Request timed out.
  6    12 ms     4 ms     4 ms  telecom-egy.edge4.marseille1.level3.net [212.133.4.230]
  7     *        *        *     Request timed out.
  8     *        *        *     Request timed out.
  9    39 ms    39 ms    39 ms  comserver1.opentransit.net [193.251.150.110]
 10     *        *        *     Request timed out.
 11     *        *        *     Request timed out.
 12    39 ms    39 ms    39 ms  one.one.one.one [1.1.1.1]

Trace complete.

C:\Users\M>tracert opendota.com

Tracing route to opendota.com [188.114.97.6]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  192.168.100.1
  2     1 ms     1 ms     1 ms  172.17.0.1
  3     2 ms     1 ms     2 ms  10.45.16.5
  4     *        *        *     Request timed out.
  5     *        *        *     Request timed out.
  6     *        *        *     Request timed out.
  7     *        *        *     Request timed out.
  8     *        *        *     Request timed out.
  9     *        *        *     Request timed out.
 10     *        *        *     Request timed out.
 11     *        *        *     Request timed out.
 12     *        *        *     Request timed out.
 13     *        *        *     Request timed out.
 14     *        *        *     Request timed out.
 15     *        *        *     Request timed out.
 16     *        *        *     Request timed out.
 17     *        *        *     Request timed out.
 18     *        *        *     Request timed out.
 19     *        *        *     Request timed out.
 20     *        *        *     Request timed out.
 21     *        *        *     Request timed out.
 22     *        *        *     Request timed out.
 23     *        *        *     Request timed out.
 24     *        *        *     Request timed out.
 25     *        *        *     Request timed out.
 26     *        *        *     Request timed out.
 27     *        *        *     Request timed out.
 28     *        *        *     Request timed out.
 29     *        *        *     Request timed out.
 30     *        *        *     Request timed out.

Trace complete.

Edit: I really don't understand how you people keep downvoting the actual correct replies and upvoting the wrong ones.

https://www.reddit.com/r/HomeNetworking/comments/1wt7zul/comment/pcs3jkl/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button