IPv4 Addresses
TTL
coursera.org. 60 IN A 13.249.39.78 coursera.org. 60 IN A 13.249.39.8 coursera.org. 60 IN A 13.249.39.95 coursera.org. 60 IN A 13.249.39.98
Name Servers
TTL
NS
AWS Route53
1d
NS
AWS Route53
1d
NS
AWS Route53
1d
NS
AWS Route53
1d
coursera.org. 86400 IN NS ns-1481.awsdns-57.org. coursera.org. 86400 IN NS ns-1590.awsdns-06.co.uk. coursera.org. 86400 IN NS ns-258.awsdns-32.com. coursera.org. 86400 IN NS ns-688.awsdns-22.net.
Mail Servers
TTL
MX
Google
10
5m
MX
Google
20
5m
MX
Google
20
5m
MX
Google
30
5m
MX
Google
30
5m
MX
Google
30
5m
MX
Google
30
5m
coursera.org. 300 IN MX 10 aspmx.l.google.com. coursera.org. 300 IN MX 20 alt2.aspmx.l.google.com. coursera.org. 300 IN MX 20 alt1.aspmx.l.google.com. coursera.org. 300 IN MX 30 aspmx2.googlemail.com. coursera.org. 300 IN MX 30 aspmx3.googlemail.com. coursera.org. 300 IN MX 30 aspmx4.googlemail.com. coursera.org. 300 IN MX 30 aspmx5.googlemail.com.
SOA Details
TTL
SOA
Primary NS
Responsible
awsdns-hostmaster.amazon.com
0m
Serial
1
0m
Times
Refresh
2h
Retry
15m
Expire
14d
Minimum TTL
1d
coursera.org. 900 IN SOA ns-1590.awsdns-06.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
DMARC
TTL
DMARC
Policy
reject
5m
Subdomain Policy
Percentage
100
0m
RUA
RUF
coursera.org. 300 IN DMARC v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=0; pct=100