mail.nationaldts.com

SOA

Primary NS

Mailbox

dns.cloudflare.com

Serial

2407422255

Refresh

10000

Retry

2400

Expire

604800

Minimum TTL

1800

NS

MX

TXT

google-site-verification=1SRQefFq9DjpoYjpRyc0J77e2LUcVahSbOYN8s4ZUHA

google-site-verification=XhHyh2I48MBW9n0C1kh9lNo8BxoMAC6qz9ZGIfcmFIU

v=spf1 a mx include:courseinstruction.com ~all

A

AAAA

CNAME

Certificate Transparency Statistics

Total Certificates: 0

Total Domains: 0

Query Time: N/A

Hostname results link to the full Cert Search surface for deeper exploration.

IPs	Origin AS	Announcement	Description
2600:1f1c:5fb:3e00:87d0:adb5:7a87:3620	AS16509	2600:1f00::/24	Amazon.com, Inc.
2600:1f1c:5fb:3e00:87d0:adb5:7a87:3620	AS16509	2600:1f1c:400::/38	Amazon.com, Inc.
2600:1f1c:5fb:3e00:87d0:adb5:7a87:3620	AS16509	2600:1f1c::/36	Amazon.com, Inc.
54.219.13.191	AS16509	54.216.0.0/14	Amazon.com, Inc.
54.219.13.191	AS16509	54.219.0.0/17	Amazon.com, Inc.

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