stackoverflow.org

`stackoverflow.org`

DNSSEC	⚠️ Not signed
A	2600:3c01::f03c:93ff:fefc:8fa0^{🇺🇸 AKAMAI-LINODE-AP2600:3c01::/32 Akamai Technologies}
A	104.237.159.63^{🇺🇸 AKAMAI-LINODE-AP104.237.152.0/21 Akamai Technologies}
NS	`ns1.linode.com` ⭐
		A	2600:14c0:6::2^{🇺🇸 Akamai2600:14c0:6::/48 Technologies}
			PTR	`c1-2.akashield.net`
		A	92.123.94.2^{🇳🇱 Akamai92.123.94.0/24 Technologies}
			PTR	`c1-2.akashield.net`
NS	`ns2.linode.com`
		A	2600:14c0:6::3^{🇺🇸 Akamai2600:14c0:6::/48 Technologies}
			PTR	`c1-3.akashield.net`
		A	92.123.94.3^{🇳🇱 Akamai92.123.94.0/24 Technologies}
			PTR	`c1-3.akashield.net`
NS	`ns3.linode.com`
		A	2600:14c0:7::3^{🇺🇸 Akamai2600:14c0:7::/48 Technologies}
			PTR	`c2-3.akashield.net`
		A	92.123.95.3^{🇳🇱 Akamai92.123.95.0/24 Technologies}
			PTR	`c2-3.akashield.net`
NS	`ns4.linode.com`
		A	2600:14c0:7::4^{🇺🇸 Akamai2600:14c0:7::/48 Technologies}
			PTR	`c2-4.akashield.net`
		A	92.123.95.4^{🇳🇱 Akamai92.123.95.0/24 Technologies}
			PTR	`c2-4.akashield.net`
NS	`ns5.linode.com`
		A	2600:14c0:7::2^{🇺🇸 Akamai2600:14c0:7::/48 Technologies}
			PTR	`c2-2.akashield.net`
		A	92.123.95.2^{🇳🇱 Akamai92.123.95.0/24 Technologies}
			PTR	`c2-2.akashield.net`
MX	`mail.protonmail.ch` ⭐
		A	176.119.200.128^{🇨🇭 Proton176.119.200.0/24}
			PTR	`mail.protonmail.ch`
		A	185.70.42.128^{🇨🇭 Proton185.70.42.0/24}
			PTR	`mail.protonmail.ch`
		A	185.205.70.128^{🇫🇷 Proton185.205.70.0/24}
			PTR	`mail.protonmail.ch`
MX	`mailsec.protonmail.ch`⁽²⁰⁾
		A	176.119.200.129^{🇨🇭 Proton176.119.200.0/24}
			PTR	`mailsec.protonmail.ch`
		A	185.70.42.129^{🇨🇭 Proton185.70.42.0/24}
			PTR	`mailsec.protonmail.ch`
		A	185.205.70.129^{🇫🇷 Proton185.205.70.0/24}
			PTR	`mailsec.protonmail.ch`
TXT	`v=spf1 include:_spf.protonmail.ch mx ~all`
TXT	`protonmail-verification=924e9f97d85f4031ce786876fdd5e271ffc4cd24`
SOA	`ns1.linode.com`brian@netninja.com serial=2021000005

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1783928323

Subdomains

www.stackoverflow.org

Same first word

Similar names

overstackflow.blogspot.com

stackoverlfow.com

overflowstack.com

stackoverfolw.com

flowoverstack.com

wolfrevokcats.com

DNS History

15 records (9 active, 6 former)

●NSns1.linode.com2015-08-14 → 2026-07-13 · 2 obs

● 2015-08-14 23:08:30
● 2026-07-13 08:07:54

●NSns2.linode.com2015-08-14 → 2026-07-13 · 2 obs

● 2015-08-14 23:08:30
● 2026-07-13 08:07:54

●NSns3.linode.com2015-08-14 → 2026-07-13 · 2 obs

● 2015-08-14 23:08:30
● 2026-07-13 08:07:54

●NSns4.linode.com2015-08-14 → 2026-07-13 · 2 obs

● 2015-08-14 23:08:30
● 2026-07-13 08:07:54

●NSns5.linode.com2015-08-14 → 2026-07-13 · 2 obs

● 2015-08-14 23:08:30
● 2026-07-13 08:07:54

○MXalt1.aspmx.l.google.com2015-08-14 → 2017-04-04 · 4 obs

● 2015-08-14 23:08:30
● 2017-04-04 09:17:36
○ 2026-02-24 21:01:12
○ 2026-07-13 08:07:54

○MXalt2.aspmx.l.google.com2015-08-14 → 2017-04-04 · 4 obs

● 2015-08-14 23:08:30
● 2017-04-04 09:17:36
○ 2026-02-24 21:01:12
○ 2026-07-13 08:07:54

○MXaspmx.l.google.com2015-08-14 → 2017-04-04 · 4 obs

● 2015-08-14 23:08:30
● 2017-04-04 09:17:36
○ 2026-02-24 21:01:12
○ 2026-07-13 08:07:54

○MXaspmx2.googlemail.com2015-08-14 → 2017-04-04 · 4 obs

● 2015-08-14 23:08:30
● 2017-04-04 09:17:36
○ 2026-02-24 21:01:12
○ 2026-07-13 08:07:54

○MXaspmx3.googlemail.com2015-08-14 → 2017-04-04 · 4 obs

● 2015-08-14 23:08:30
● 2017-04-04 09:17:36
○ 2026-02-24 21:01:12
○ 2026-07-13 08:07:54

●MXmail.protonmail.ch2026-02-24 → 2026-07-13 · 3 obs

○ 2017-04-04 09:17:36
● 2026-02-24 21:01:12
● 2026-07-13 08:07:54

●MXmailsec.protonmail.ch2026-02-24 → 2026-07-13 · 3 obs

○ 2017-04-04 09:17:36
● 2026-02-24 21:01:12
● 2026-07-13 08:07:54

●A104.237.159.632026-02-24 → 2026-07-13 · 3 obs

○ 2017-04-04 09:17:36
● 2026-02-24 21:01:12
● 2026-07-13 08:07:54

○A198.74.50.152015-08-14 → 2017-04-04 · 4 obs

● 2015-08-14 23:08:30
● 2017-04-04 09:17:36
○ 2026-02-24 21:01:12
○ 2026-07-13 08:07:54

●A2600:3c01::f03c:93ff:fefc:8fa02026-02-24 → 2026-07-13 · 3 obs

○ 2017-04-04 09:17:36
● 2026-02-24 21:01:12
● 2026-07-13 08:07:54

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b2.org.afilias-nst.org, b0.org.afilias-nst.org, d0.org.afilias-nst.org	-
stackoverflow.org	ns5.linode.com, ns3.linode.com, ns4.linode.com, ns1.linode.com...	-

✅ Authoritative Response

Server:92.123.95.2

NS records: ns5.linode.com, ns3.linode.com, ns4.linode.com, ns1.linode.com, ns2.linode.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for stackoverflow.org (unsigned zone)

⏱️ Timing

Total: 822ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`104.237.159.63`
AAAA	1	`2600:3c01::f03c:93ff:fefc:8fa0`
NS	5	`ns3.linode.com, ns1.linode.com...`
MX	2	`mail.protonmail.ch (pri: 10), mailsec.protonmail.ch (pri: 20)`
TXT	2	`protonmail-verification=924e9f97d85f4031, v=spf1 include:_spf.protonmail.ch mx ~al`
SOA	1	`ns1.linode.com brian.netninja.com`

Analysis

Hierarchy

stackoverflow.org is a parent domain of www.stackoverflow.org.

IP Addresses

stackoverflow.org resolves to the IP addresses 104.237.159.63 and 2600:3c01::f03c:93ff:fefc:8fa0

Additional host names — netninja.org, www.stackoverflow.org, mail.vanishingpointwiki.com and two others — share IP numbers with stackoverflow.org.

Name Servers

Delegation for stackoverflow.org is to five name servers: ns1.linode.com, ns2.linode.com, ns3.linode.com and two others.

stackoverflow.org shares at least some of its name servers with other domains, including guzcloud.com, ryanlainchbury.com, trinix.com.br and two others.

These name servers are frequently paired with the name servers ns4.linode.com and ns5.linode.com.

Host names with two IP numbers:

ns1.linode.com resolves to two addresses: 92.123.94.2 and 2600:14c0:6::2.

ns2.linode.com resolves to two addresses: 92.123.94.3 and 2600:14c0:6::3.

ns3.linode.com resolves to two addresses: 92.123.95.3 and 2600:14c0:7::3.

ns4.linode.com resolves to two addresses: 92.123.95.4 and 2600:14c0:7::4.

ns5.linode.com resolves to two addresses: 92.123.95.2 and 2600:14c0:7::2.

Mail Servers

stackoverflow.org has two mail servers: mail.protonmail.ch and mailsec.protonmail.ch.

stackoverflow.org shares the same mail server setup as other domains, including theriana.com, zesik.com, vexilo.com and two others.

stackoverflow.org shares mail servers — at least in part — with other domains, including elektropost.net, behzad.email, dns10.com and two others.

mail.protonmail.ch and mailsec.protonmail.ch each resolve to three IP addresses. mail.protonmail.ch resolves to 176.119.200.128, 185.70.42.128 and 185.205.70.128. mailsec.protonmail.ch resolves to 176.119.200.129, 185.70.42.129 and 185.205.70.129.

stackoverflow.org - robtex.com

org

Subdomains

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

Hierarchy

IP Addresses

Name Servers

Mail Servers

`stackoverflow.org`

`org`