Solve DNS Tests facebook.com
    

All Tools  |  DNS Speed Test  |  Traceroute  |  Ping  |  Reverse DNS  |  DNS Analytics  |  DNS Comparison  |  Statistics  |  Blog  |  RBL  |  DNS Propagation

Facebook.com DNS Tests

  
TLD ▼  |  Name Servers ▼  |  A Records ▼  |  Speed and Health ▼  |  AAAA Records ▼  |  MX Records ▼  |  SOA Record ▼
Top Level Domain

INFO
Using Root Server l.root-servers.net
PASS
Your TLD is recognized at the root servers.
INFO
Got redirected to a.gtld-servers.net
INFO
Got redirected to a.ns.facebook.com
PASS
You have 2 name servers. Anything more than 1 is good.

Name Servers

INFO
Name Server (NS) records at the TLD name server a.gtld-servers.net:

a.ns.facebook.com
b.ns.facebook.com
PASS
The TLD name server a.gtld-servers.net sent A records (GLUE) for the name servers of facebook.com in the additional section of the response. This speeds up the computation by avoiding an additional DNS query for the A records of the name servers.
INFO
a.ns.facebook.com has the following A Records:

69.171.239.12, located at Palo Alto, United States
INFO
b.ns.facebook.com has the following A Records:

69.171.255.12, located at Palo Alto, United States
PASS
All of your name servers have A records.
PASS
All of your name servers are on seperate IP addresses.
INFO
The A records of your name servers indicate that your name servers are not geo distributed. It is recommended that your name servers be in different geographical locations to ensure the best availability.
PASS
Your name server a.ns.facebook.com is responding to DNS queries.
PASS
Your name server a.ns.facebook.com is responding with the same set of NS records as compared to the TLD server a.gtld-servers.net.
PASS
Name server a.ns.facebook.com sent A records (GLUE) along with the response for the NS records query for facebook.com.
PASS
Your name server b.ns.facebook.com is responding to DNS queries.
PASS
Your name server b.ns.facebook.com is responding with the same set of NS records as compared to the TLD server a.gtld-servers.net.
PASS
Name server b.ns.facebook.com sent A records (GLUE) along with the response for the NS records query for facebook.com.
PASS
All of your name servers return the same NS records.
PASS
Your name server a.ns.facebook.com is authoritative for the domain name facebook.com.
PASS
Your name server b.ns.facebook.com is authoritative for the domain name facebook.com.
PASS
The SOA serial is the same at all your name servers.
PASS
None of your name servers seem to allow recursive queries.

A Records

INFO
facebook.com has the following A Records:

157.240.2.35 (TTL: 300 seconds) is located at New York, United States
INFO
The WWW record for facebook.com (www.facebook.com) is a CNAME Record. An A record is recommended. The CNAME for www.facebook.com points to star-mini.c10r.facebook.com. star-mini.c10r.facebook.com does not have an A Record! There could be multiple levels of indirection which have not been followed.

AAAA Records

INFO
facebook.com has the following AAAA Records:

2a03:2880:f127:83:face:b00c:0:25de (TTL: 300 seconds). The IPv6 address is valid.

SOA Record

INFO
SOA Record:

Serial: 1537469788
Refresh: 14400 seconds
Retry: 1800 seconds
Expire: 604800 seconds
Minimum TTL: 300 seconds
Primary Name Server: a.ns.facebook.com
Contact: [email protected]
PASS
Your SOA Refresh value 14400 is OK. The recommended value is between 1200 and 86400.
PASS
Your SOA Retry value 1800 is OK. The recommended value is between 120 and 7200.
PASS
Your SOA Expire value 604800 is OK. The recommended value is between 604800 and 2419200.
WARNING
Your SOA Minimum TTL value is 300. This might be a little low. The recommended value is between 1800 and 86400.
PASS
The primary name server in the SOA record (a.ns.facebook.com) is sent by the TLD name server a.gtld-servers.net for queries on facebook.com.

MX Records

INFO
facebook.com has the following MX records:

msgin.vvv.facebook.com
PASS
Your name servers sent A Records (GLUE) for your mail servers for MX queries. This speeds up the DNS lookups.
INFO
Mail Server msgin.vvv.facebook.com has the following A Records:

66.220.151.224 (TTL: 300 seconds), located at Palo Alto, United States.
PASS
All of your MX servers have A records.
PASS
All of your MX records are on different IP addresses. This is the recommended way of creating A Records for MX servers.
WARNING
You have only 1 MX Record for facebook.com. At least 2 is recommended.
PASS
Your domain name has an SPF record (v=spf1 redirect=_spf.facebook.com). This prevents email spoofing.

Name Server Speed and Health

PASS
After 9 lookups, the average response time of your name server a.ns.facebook.com is 5.33 milliseconds:

Los Angeles:11.15 ms
Dallas:6.35 ms
New York:1.92 ms
Singapore:2.37 ms
London:3.09 ms
Amsterdam:8.67 ms
San Francisco:3.77 ms
INFO
Health: Across all queries that we sent to a.ns.facebook.com, the success rate is 99.85% (uptime).
PASS
After 11 lookups, the average response time of your name server b.ns.facebook.com is 3.09 milliseconds:

Los Angeles:1.41 ms
Dallas:1.9 ms
New York:0.88 ms
Singapore:1.49 ms
London:1.64 ms
Amsterdam:1.24 ms
San Francisco:13.06 ms
INFO
Health: Across all queries that we sent to b.ns.facebook.com, the success rate is 99.86% (uptime).

DNS Rating

A
Rating by SolveDNS
facebook.com DNS tests had 0 failed tests and 2 warnings.

92.86% out of 100



DNS Speed Test  |  SolveDNS Blog  |  NameServer Analytics  |  DNS Speed Comparison  |  Web Statistics  |  DNS Reviews

Contact: infoATsolvedns.com

© Copyright SolveDNS, All Rights Reserved