stackoverflow.org - dns.ninja

`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	`protonmail-verification=924e9f97d85f4031ce786876fdd5e271ffc4cd24`
TXT	`v=spf1 include:_spf.protonmail.ch mx ~all`
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=1781421773

Subdomains

www.stackoverflow.org

Same first word

Similar names

overstackflow.blogspot.com

stackoverlfow.com

overflowstack.com

flowoverstack.com

wolfrevokcats.com

DNS History

15 records (9 active, 6 former)

●NSns1.linode.com2015-08-14 → 2026-06-14 · 2 obs

● 2015-08-14 23:08:30
● 2026-06-14 07:55:40

●NSns2.linode.com2015-08-14 → 2026-06-14 · 2 obs

● 2015-08-14 23:08:30
● 2026-06-14 07:55:40

●NSns3.linode.com2015-08-14 → 2026-06-14 · 2 obs

● 2015-08-14 23:08:30
● 2026-06-14 07:55:40

●NSns4.linode.com2015-08-14 → 2026-06-14 · 2 obs

● 2015-08-14 23:08:30
● 2026-06-14 07:55:40

●NSns5.linode.com2015-08-14 → 2026-06-14 · 2 obs

● 2015-08-14 23:08:30
● 2026-06-14 07:55:40

○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
○ 2026-06-14 07:55:40

○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
○ 2026-06-14 07:55:40

○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
○ 2026-06-14 07:55:40

○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
○ 2026-06-14 07:55:40

○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
○ 2026-06-14 07:55:40

●MXmail.protonmail.ch2026-02-24 → 2026-06-14 · 3 obs

○ 2017-04-04 09:17:36
● 2026-02-24 21:01:12
● 2026-06-14 07:55:40

●MXmailsec.protonmail.ch2026-02-24 → 2026-06-14 · 3 obs

○ 2017-04-04 09:17:36
● 2026-02-24 21:01:12
● 2026-06-14 07:55:40

●A104.237.159.632026-02-24 → 2026-06-14 · 3 obs

○ 2017-04-04 09:17:36
● 2026-02-24 21:01:12
● 2026-06-14 07:55:40

○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
○ 2026-06-14 07:55:40

●A2600:3c01::f03c:93ff:fefc:8fa02026-02-24 → 2026-06-14 · 3 obs

○ 2017-04-04 09:17:36
● 2026-02-24 21:01:12
● 2026-06-14 07:55:40

🔍 DNS Trace

📋 Delegation Chain

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

✅ Authoritative Response

Server:92.123.94.2

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: 841ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`104.237.159.63`
AAAA	1	`2600:3c01::f03c:93ff:fefc:8fa0`
NS	5	`ns5.linode.com, ns1.linode.com...`
MX	2	`mailsec.protonmail.ch (pri: 20), mail.protonmail.ch (pri: 10)`
TXT	2	`protonmail-verification=924e9f97d85f4031, v=spf1 include:_spf.protonmail.ch mx ~al`
SOA	1	`ns1.linode.com brian.netninja.com`

Analysis

Hierarchy

www.stackoverflow.org is delegated beneath stackoverflow.org.

IP Addresses

stackoverflow.org points to two IP numbers: 104.237.159.63 and 2600:3c01::f03c:93ff:fefc:8fa0.

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

Name Servers

stackoverflow.org has five name servers, which are ns1.linode.com, ns2.linode.com, ns3.linode.com and two others.

There is at least partial name server overlap between stackoverflow.org and other domains — guzcloud.com, ryanlainchbury.com, trinix.com.br and two more among them.

These name servers frequently co-occur with the name servers ns4.linode.com and ns5.linode.com.

Hostnames that resolve to two IP addresses:

ns1.linode.com maps to two IP addresses — 92.123.94.2 and 2600:14c0:6::2.

ns2.linode.com maps to two IP addresses — 92.123.94.3 and 2600:14c0:6::3.

ns3.linode.com maps to two IP addresses — 92.123.95.3 and 2600:14c0:7::3.

ns4.linode.com maps to two IP addresses — 92.123.95.4 and 2600:14c0:7::4.

ns5.linode.com maps to two IP addresses — 92.123.95.2 and 2600:14c0:7::2.

Mail Servers

Mail for stackoverflow.org is handled by two mail servers — mail.protonmail.ch and mailsec.protonmail.ch.

stackoverflow.org uses an identical mail server configuration to several other domains — among them theriana.com, zesik.com, vexilo.com and two more.

stackoverflow.org has at least partial mail server overlap with other domains such as elektropost.net, behzad.email, dns10.com and two more.

mail.protonmail.ch points to 176.119.200.128, 185.70.42.128 and 185.205.70.128. mailsec.protonmail.ch points to 176.119.200.129, 185.70.42.129 and 185.205.70.129. Both hosts resolve to three IP numbers.