`o365microsoftonline.com`

DNSSEC	⚠️ Not signed
A	13.210.247.156^{🇦🇺 Amazon13.210.0.0/15 EC2 SYD prefix}
		PTR	`ec2-13-210-247-156.ap-southeast-2.compute.amazonaws.com`
NS	`ns-451.awsdns-56.com` ⭐
		A	2600:9000:5301:c300::1^{🇺🇸 Amazon2600:9000:5301::/48 - CloudFront}
			PTR	`ns-451.awsdns-56.com`
		A	205.251.193.195^{🇺🇸 Amazon205.251.193.0/24 prefix}
			PTR	`ns-451.awsdns-56.com`
NS	`ns-1390.awsdns-45.org`
		A	2600:9000:5305:6e00::1^{🇺🇸 Amazon2600:9000:5305::/48 - CloudFront}
			PTR	`ns-1390.awsdns-45.org`
		A	205.251.197.110^{🇺🇸 Amazon205.251.197.0/24 prefix}
			PTR	`ns-1390.awsdns-45.org`
NS	`ns-1757.awsdns-27.co.uk`
		A	2600:9000:5306:dd00::1^{🇺🇸 Amazon2600:9000:5306::/48 - CloudFront}
			PTR	`ns-1757.awsdns-27.co.uk`
		A	205.251.198.221^{🇺🇸 Amazon205.251.198.0/24 prefix}
			PTR	`ns-1757.awsdns-27.co.uk`
NS	`ns-979.awsdns-58.net`
		A	2600:9000:5303:d300::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-979.awsdns-58.net`
		A	205.251.195.211^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-979.awsdns-58.net`
SOA	`ns-451.awsdns-56.com`awsdns-hostmaster@amazon.com serial=1

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1786618539

Same first word

o365microsoftonline.com

Similar names

microsoftonlineo365.com

DNS History

5 records (5 active, 0 former)

●NSns-1390.awsdns-45.org2026-04-12 → 2026-08-13 · 2 obs

● 2026-04-12 10:47:14
● 2026-08-13 11:03:12

●NSns-1757.awsdns-27.co.uk2026-04-12 → 2026-08-13 · 2 obs

● 2026-04-12 10:47:14
● 2026-08-13 11:03:12

●NSns-451.awsdns-56.com2026-04-12 → 2026-08-13 · 2 obs

● 2026-04-12 10:47:14
● 2026-08-13 11:03:12

●NSns-979.awsdns-58.net2026-04-12 → 2026-08-13 · 2 obs

● 2026-04-12 10:47:14
● 2026-08-13 11:03:12

●A13.210.247.1562026-04-12 → 2026-08-13 · 2 obs

● 2026-04-12 10:47:14
● 2026-08-13 11:03:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
o365microsoftonline.com	ns-451.awsdns-56.com, ns-979.awsdns-58.net, ns-1757.awsdns-27.co.uk, ns-1390.awsdns-45.org	2 records

✅ Authoritative Response

Server:205.251.193.195

NS records: ns-451.awsdns-56.com, ns-979.awsdns-58.net, ns-1757.awsdns-27.co.uk, ns-1390.awsdns-45.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for o365microsoftonline.com (unsigned zone)

⏱️ Timing

Total: 227ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`13.210.247.156`
NS	4	`ns-1390.awsdns-45.org, ns-1757.awsdns-27.co.uk...`
SOA	1	`ns-451.awsdns-56.com awsdns-hostmaster.a`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-451.awsdns-56.com, ns-451.awsdns-56.com)

Analysis

IP Addresses

o365microsoftonline.com resolves to one IP address: 13.210.247.156.

The host names signin-okta.net, theultimatelistener.com, 0365microsoftonline.com and ec2-13-210-247-156.ap-southeast-2.compute.amazonaws.com all share IP numbers with o365microsoftonline.com.

Name Servers

The authoritative name servers for o365microsoftonline.com are ns-451.awsdns-56.com, ns-979.awsdns-58.net, ns-1390.awsdns-45.org and ns-1757.awsdns-27.co.uk.

There is at least partial name server overlap between o365microsoftonline.com and other domains — startenbrelplaquepsoriasis.com, pto.wa.gov.au, calendarium.de and two more among them.

All four hostnames — ns-451.awsdns-56.com, ns-979.awsdns-58.net, ns-1390.awsdns-45.org and ns-1757.awsdns-27.co.uk — resolve to two IP numbers apiece: ns-451.awsdns-56.com to 205.251.193.195 and 2600:9000:5301:c300::1; ns-979.awsdns-58.net to 205.251.195.211 and 2600:9000:5303:d300::1; ns-1390.awsdns-45.org to 205.251.197.110 and 2600:9000:5305:6e00::1; ns-1757.awsdns-27.co.uk to 205.251.198.221 and 2600:9000:5306:dd00::1.

o365microsoftonline.com - robtex.com