This document is a companion to the article 1.1.1.1: Fast, but not so accurate (yet).
"A" response records for YouTube, and network connectivity and latency to the answers, from Comcast in Memphis, TN. Tests conducted 2018-04-04.
Querying the A record for youtube.com, 1.1.1.1 gives the poorest answer:
inexplicably, a server in Bogota, Colombia, South America. The most
optimal results were returned by Comcast and Level3, which both gave the
same IP for a server in Dallas.
1.1.1.1 resolved youtube.com to 216.58.222.238 (bog02s06-in-f14.1e100.net) in Bogota, Colombia (!), 18 hops, ping average 86.6 ms.
[parse@word ~]$ dig +short A youtube.com @1.1.1.1
216.58.222.238
[parse@word ~]$ mtr -c 100 216.58.222.238
Host Loss% Snt Last Avg Best Wrst StDev
1. router-external.home.lan 0.0% 100 13.2 1.5 0.8 25.3 2.7
2. 96.120.15.nnn 0.0% 100 11.6 11.8 9.4 38.7 3.6
3. 68.85.55.249 0.0% 100 25.4 12.3 9.3 37.3 3.8
4. be-92-ar02.dannythomas.tn.malt.co 0.0% 100 12.7 13.3 10.9 24.8 2.3
5. be-22258-cr02.dallas.tx.ibone.com 0.0% 100 24.1 23.4 20.3 34.3 2.5
6. be-12495-pe03.1950stemmons.tx.ibo 0.0% 100 21.2 23.3 20.0 51.4 5.3
7. 66.208.228.66 0.0% 100 20.9 22.6 19.9 38.9 3.2
8. 108.170.252.162 0.0% 100 20.3 23.8 19.9 63.7 6.0
9. 108.170.228.91 0.0% 100 22.3 22.7 19.8 46.9 3.8
10. 209.85.249.139 0.0% 100 43.5 45.5 41.9 73.3 4.8
11. 108.170.231.78 0.0% 100 43.0 44.6 42.3 63.8 2.7
12. 108.170.231.79 0.0% 100 44.9 45.6 42.8 68.9 4.4
13. 108.170.231.85 0.0% 100 44.3 48.1 42.7 103.6 9.5
14. 74.125.37.174 0.0% 100 68.9 71.1 67.4 95.7 4.8
15. 64.233.175.234 1.0% 100 86.6 87.8 85.3 116.2 3.6
16. 108.170.253.193 1.0% 100 87.0 87.6 85.0 106.6 3.6
17. 216.239.54.133 0.0% 100 85.7 85.7 83.2 102.2 3.3
18. bog02s06-in-f14.1e100.net 0.0% 100 85.2 86.6 83.9 107.9 3.8
4.2.2.4 resolved youtube.com to 172.217.9.14 (dfw28s02-in-f14.1e100.net) in Dallas, 11 hops, ping average 21.4 ms. The same result was returned by Comcast's DNS.
[parse@word ~]$ dig +short A youtube.com @4.2.2.4
172.217.9.14
[parse@word ~]$ mtr -c 100 172.217.9.14
Host Loss% Snt Last Avg Best Wrst StDev
1. router-external.home.lan 0.0% 100 1.2 1.7 0.8 29.9 3.3
2. 96.120.15.nnn 0.0% 100 11.3 12.0 9.6 35.1 3.8
3. Te5-1-ur01.bartlett.tn.malt.comca 0.0% 100 10.2 12.8 9.6 47.7 5.5
4. 68.86.242.157 0.0% 100 12.1 12.1 9.4 40.1 3.7
5. be-92-ar02.dannythomas.tn.malt.co 0.0% 100 11.8 13.7 10.7 36.1 4.0
6. be-22258-cr02.dallas.tx.ibone.com 0.0% 100 20.7 23.6 20.4 42.8 3.6
7. be-12495-pe03.1950stemmons.tx.ibo 0.0% 100 21.6 23.5 19.9 49.9 5.7
8. 66.208.228.66 0.0% 100 22.6 23.1 19.5 57.8 5.2
9. ???
10. 108.170.231.69 0.0% 100 21.7 22.4 19.4 41.5 3.8
11. dfw28s02-in-f14.1e100.net 0.0% 100 19.6 21.4 19.1 40.9 3.5
8.8.8.8 resolved youtube.com to 172.217.6.174 (dfw25s17-in-f174.1e100.net) in Dallas, 12 hops, ping average 21.5 ms.
[parse@word ~]$ dig +short A youtube.com @8.8.8.8
172.217.6.174
[parse@word ~]$ mtr -c 100 172.217.6.174
Host Loss% Snt Last Avg Best Wrst StDev
1. router-external.home.lan 0.0% 100 1.2 2.1 0.9 26.5 3.7
2. 96.120.15.nnn 0.0% 100 10.3 11.9 9.6 25.3 2.7
3. Te5-4-ur01.bartlett.tn.malt.comca 0.0% 100 11.7 12.6 9.4 34.8 4.3
4. 68.86.242.157 0.0% 100 11.3 11.8 9.4 33.9 3.5
5. be-92-ar02.dannythomas.tn.malt.co 0.0% 100 12.5 13.9 10.8 34.2 4.0
6. be-22258-cr02.dallas.tx.ibone.com 0.0% 100 22.3 24.6 20.5 44.6 4.4
7. be-12441-pe01.1950stemmons.tx.ibo 0.0% 100 20.6 22.5 20.1 45.8 3.8
8. 75.149.231.222 0.0% 100 20.4 22.7 19.9 48.4 4.5
9. ???
10. 209.85.242.54 0.0% 100 22.3 22.3 19.4 49.4 4.2
11. 216.239.35.161 0.0% 100 40.3 22.1 19.9 40.3 3.0
12. dfw25s17-in-f174.1e100.net 0.0% 100 20.5 21.5 18.6 46.0 4.4
9.9.9.9 resolved youtube.com to 172.217.0.142 (atl14s77-in-f14.1e100.net) in Atlanta, 14 hops, ping average 32.4 ms.
[parse@word ~]$ dig +short A youtube.com @9.9.9.9
172.217.0.142
[parse@word ~]$ mtr -c 100 172.217.0.142
Host Loss% Snt Last Avg Best Wrst StDev
1. router-external.home.lan 0.0% 100 0.9 2.0 0.8 26.1 4.1
2. 96.120.15.nnn 0.0% 100 10.5 12.3 9.3 37.0 4.9
3. 68.85.55.249 0.0% 100 10.8 11.9 9.4 30.0 3.0
4. be-92-ar02.dannythomas.tn.malt.co 0.0% 100 13.4 13.9 10.9 39.2 4.6
5. be-22258-cr02.dallas.tx.ibone.com 0.0% 100 23.2 23.7 20.4 47.9 3.9
6. be-12495-pe03.1950stemmons.tx.ibo 0.0% 100 21.2 22.5 19.4 48.5 4.1
7. 66.208.228.66 0.0% 100 19.8 23.3 19.8 58.4 6.4
8. 108.170.240.209 0.0% 100 21.5 23.4 19.7 74.3 5.9
9. 108.170.228.84 0.0% 100 24.5 23.2 20.2 44.3 4.2
10. 209.85.249.50 0.0% 100 40.5 33.7 30.9 62.2 4.7
11. 209.85.250.69 0.0% 100 31.7 33.2 30.4 63.1 3.8
12. 108.170.249.161 0.0% 100 32.9 32.8 30.1 45.2 2.4
13. 108.170.225.127 0.0% 100 31.7 33.4 30.1 57.8 4.1
14. atl14s77-in-f14.1e100.net 0.0% 100 30.8 32.4 29.3 58.3 4.5
75.75.75.75 (Comcast's DNS) resolved youtube.com to 172.217.9.14 (dfw28s02-in-f14.1e100.net) in Dallas, 11 hops, ping average 20.9 ms. The same result was returned by Level3's DNS.
[parse@word ~]$ dig +short A youtube.com @75.75.75.75
172.217.9.14
[parse@word ~]$ mtr -c 100 172.217.9.14
Host Loss% Snt Last Avg Best Wrst StDev
1. router-external.home.lan 0.0% 100 1.2 1.6 0.8 27.1 2.7
2. 96.120.15.nnn 0.0% 100 10.1 13.0 9.6 35.7 6.0
3. Te5-1-ur01.bartlett.tn.malt.comca 0.0% 100 11.7 12.0 9.6 33.6 3.3
4. 68.86.242.157 0.0% 100 10.9 12.0 9.4 38.8 3.7
5. be-92-ar02.dannythomas.tn.malt.co 0.0% 100 22.7 13.1 11.0 42.3 3.3
6. be-22258-cr02.dallas.tx.ibone.com 0.0% 100 23.8 23.6 20.9 40.9 3.3
7. be-12495-pe03.1950stemmons.tx.ibo 0.0% 100 21.7 22.4 20.2 46.2 4.0
8. 66.208.228.66 0.0% 100 22.0 22.4 19.7 42.9 4.0
9. ???
10. 108.170.231.69 0.0% 100 22.4 22.6 19.7 46.0 4.4
11. dfw28s02-in-f14.1e100.net 0.0% 100 22.8 20.9 19.0 40.0 2.5
DNS server | Answer RR | City | Avg Latency
-------------|------------------|------------------|------------
1.1.1.1 | 216.58.222.238 | Bogota, Colombia | 86.6 ms
4.2.2.4 | 172.217.9.14 | Dallas, TX | 21.4 ms
8.8.8.8 | 172.217.6.174 | Dallas, TX | 21.5 ms
9.9.9.9 | 172.217.0.142 | Atlanta, GA | 32.4 ms
75.75.75.75 | 172.217.9.14 | Dallas, TX | 20.9 ms
Best results: 75.75.75.75, 4.2.2.4, 8.8.8.8
Worst results: 1.1.1.1