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Public DNS Service Comparisons - www.facebook.com

This document is a companion to the article 1.1.1.1: Fast, but not so accurate (yet).

"A" response records for Facebook, and network connectivity and latency to the answers, from Comcast in Memphis, TN. Tests conducted 2018-04-04.

Querying the A record for www.facebook.com, 1.1.1.1 gives a tied-for-best answer, a low latency server in Dallas also returned by Comcast, Google, and Level3.

1.1.1.1, 4.2.2.4, 8.8.8.8, 75.75.75.75

These four DNS providers all resolved www.facebook.com to 157.240.19.35 (edge-star-mini-shv-01-dfw5.facebook.com) in Dallas, 11 hops, ping average 21.8 ms.

[parse@word ~/dns]$ dig +short A www.facebook.com @1.1.1.1
star-mini.c10r.facebook.com.
157.240.19.35
[parse@word ~/dns]$ dig +short A www.facebook.com @4.2.2.4
star-mini.c10r.facebook.com.
157.240.19.35
[parse@word ~/dns]$ dig +short A www.facebook.com @8.8.8.8
star-mini.c10r.facebook.com.
157.240.19.35
[parse@word ~/dns]$ dig +short A www.facebook.com @75.75.75.75
star-mini.c10r.facebook.com.
157.240.19.35

[parse@word ~]$ mtr -c 100 157.240.19.35

 Host                                 Loss%   Snt   Last   Avg  Best  Wrst StDev
 1. router-external.home.lan           0.0%   100    1.2   1.9   0.8  21.9   3.1
 2. 96.120.15.nnn                      0.0%   100   10.9  12.2   9.6  31.7   3.6
 3. Te5-1-ur01.bartlett.tn.malt.comca  0.0%   100    9.5  12.2   9.5  41.3   4.3
 4. 68.86.242.157                      0.0%   100   10.8  12.0   9.6  33.3   3.3
 5. be-92-ar02.dannythomas.tn.malt.co  0.0%   100   11.8  14.2  11.1  50.7   6.0
 6. be-22258-cr02.dallas.tx.ibone.com  0.0%   100   22.2  24.2  20.9  49.1   5.0
 7. be-12441-pe01.1950stemmons.tx.ibo  0.0%   100   22.9  22.9  19.8  42.8   3.3
 8. 173.167.58.158                     0.0%   100   24.8  32.2  20.1  86.5  11.7
 9. po102.psw04.dfw5.tfbnw.net         0.0%   100   24.0  22.8  19.7  45.1   4.5
10. 173.252.67.181                     0.0%   100   21.7  22.6  19.4  54.2   4.9
11. edge-star-mini-shv-01-dfw5.facebo  0.0%   100   20.8  21.8  19.1  49.9   4.8

9.9.9.9

9.9.9.9 resolved www.facebook.com to 31.13.65.36 (edge-star-mini-shv-01-atl3.facebook.com) in Atlanta, 11 hops, ping average 33.1 ms.

[parse@word ~]$ dig +short A youtube.com @9.9.9.9
31.13.65.36

[parse@word ~]$ mtr -c 100 31.13.65.36

 Host                                 Loss%   Snt   Last   Avg  Best  Wrst StDev
 1. router-external.home.lan           0.0%   100    1.4   1.8   0.8  23.4   2.9
 2. 96.120.15.nnn                      0.0%   100   12.0  13.3   9.5  37.6   4.9
 3. 68.85.55.249                       0.0%   100   11.1  12.6   9.2  42.7   4.8
 4. be-92-ar02.dannythomas.tn.malt.co  0.0%   100   19.8  13.9  10.8  30.8   3.6
 5. be-22258-cr02.dallas.tx.ibone.com  0.0%   100   23.1  23.3  20.4  51.9   3.5
 6. be-11424-cr02.56marietta.ga.ibone  0.0%   100   42.9  35.1  31.9  63.0   4.1
 7. be-11486-pe03.56marietta.ga.ibone  0.0%   100   33.3  33.6  31.1  60.4   4.2
 8. 23.30.206.90                       0.0%   100   31.9  37.1  31.4  69.9   8.8
 9. po103.psw01.atl3.tfbnw.net         0.0%   100   37.3  34.2  31.4  55.8   3.6
10. 173.252.67.33                      0.0%   100   33.0  34.2  31.6  55.5   3.9
11. edge-star-mini-shv-01-atl3.facebo  0.0%   100   35.7  33.1  30.4  50.1   3.0

Summary

DNS server   | Answer RR        | City             | Avg Latency
-------------|------------------|------------------|------------
1.1.1.1      | 157.240.19.35    | Dallas, TX       | 21.8 ms
4.2.2.4      | 157.240.19.35    | Dallas, TX       | 21.8 ms
8.8.8.8      | 157.240.19.35    | Dallas, TX       | 21.8 ms
9.9.9.9      | 31.13.65.36      | Atlanta, GA      | 33.1 ms
75.75.75.75  | 157.240.19.35    | Dallas, TX       | 21.8 ms

Best results: 1.1.1.1, 4.2.2.4, 8.8.8.8, 75.75.75.75

Worst results: 9.9.9.9

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