Depending on what kind of problems you're seeing, you probably want to do a traceroute from a network where you have good performance/reliability to someplace distant (I use slashdot.org (:-)), land then again from the doubtful network.
The names you see are sometimes clear...
[davecb@miles Networking]$ traceroute slashdot.org traceroute to slashdot.org (216.105.38.15), 30 hops max, 60 byte packets
1 _gateway (192.168.7.1) 0.409 ms 0.402 ms 0.246 ms
2 10.0.0.1 (10.0.0.1) 2.168 ms 2.784 ms 2.962 ms
3 99.240.238.1 (99.240.238.1) 19.416 ms 14.751 ms 14.897 ms
4 8081-dgw01.ym.rmgt.net.rogers.com (67.231.222.137) 19.446 ms 14.282 ms 14.152 ms
5 69.63.249.221 (69.63.249.221) 19.653 ms 19.892 ms 19.737 ms
6 209.148.235.218 (209.148.235.218) 14.454 ms 18.395 ms 18.287 ms
7 ae58.bar3.Toronto1.Level3.net (4.59.180.41) 34.759 ms 34.188 ms 34.265 ms
8 ae-2-3611.edge2.NewYork6.Level3.net (4.69.209.82) 40.920 ms 41.218 ms 41.547 ms
9 * * *
10 los-edge-08.inet.qwest.net (67.14.22.202) 103.209 ms 96.349 ms 102.989 ms
11 65-126-18-126.dia.static.qwest.net (65.126.18.126) 94.487 ms 94.216 ms 83.169 ms
12 br05-te0-0-1-6.lwdc.americanis.net (207.158.62.109) 82.873 ms 82.800 ms 83.479 ms
13 ar07-te13-3.lwdc.americanis.net (209.216.192.66) 83.737 ms * *
14 216.105.38.15 (216.105.38.15) 89.270 ms 83.401 ms 83.303 ms
For example, 8081-dgw01.ym.rmgt.net.rogers.com is Rogers, etc. For missing or more obscure names, use command-line whois with the IP address:
[davecb@miles Networking]$ whois 69.63.249.221
[Querying whois.arin.net]
[whois.arin.net]
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2020, American Registry for Internet Numbers, Ltd.
#
NetRange: 69.63.240.0 - 69.63.255.255
CIDR: 69.63.240.0/20
NetName: ROGERS-COM-INFR
NetHandle: NET-69-63-240-0-1
Parent: NET69 (NET-69-0-0-0-0)
NetType: Direct Allocation
OriginAS: AS812
Organization: Rogers Communications Canada Inc. (RCC-184)
RegDate: 2008-05-01
Updated: 2017-01-06
Ref: https://rdap.arin.net/registry/ip/69.63.240.0
You will get two things:
I have a script that subtracts the lines of three sample times from one another, but eyeballs work well, too (;-))
I'd be curious to see which Utopia you get: Mumbai or Utah (;-))
--dave
Sorry. My wife and I are trying to discern if my BIL's network was a problem in the past. It has been the family's network. The kids and her computer in the past had routed via utopia.net when we entered in addresses or search terms. I am trying to see if there is anything wrong with my BIL's network now. I am a bit suspicious based on what I read about utopia.net. My wife wants me to find more significant findings before she allows herself to question matters. I don't know all that much except that utopia.net was noted as a malware site on many searches I've done.
Nov 22, 2020, 2:29 PM by talk@gtalug.org:
On 2020-11-22 2:13 p.m., Joseph Rocklin via talk wrote:
Hi all,
I just tried a reverse dns lookup on whoismydns.com for my wife's computer on a family-member's network.
Result:
DNS Server: 67.231.208.167
Reverse DNS: pub-cdns3-wlfdle-eth1.rpub.net.rogers.com
IP Owner: Rogers
Does this seem correct? I have my dns settings set on my machine and I get my expected DNS results on my machine on this family member's network. Is there any reason to be concerned here?
I had noticed a while back, before upgrades on this family member's network, that utopia.net was being used as the DNS server. It was on more than one machine that used that network. Now I'm wondering if somehow this network was routing, in a still-problematic way, but just via a local address?
I may have confused some concepts as I am just getting my feet wet with this topic of DNS servers.
If anyone has suggestions to confirm if the network is properly setup, please let me know.
Why are you looking up the DNS, when you want to look up your wife's computer? Look up her WAN address.
Her host name should be something like cpe<router MAC>-cm<modem MAC>.cpe.net.cable.rogers.com. Host name changed to protect the guilty. ;-)
She should also have IPv6 addresses.
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