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	`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=1776993843

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 → 2026-04-24 · 2 obs

● 2015-08-14 23:08:30
● 2026-04-24 01:57:08

●NSns2.linode.com2015-08-14 → 2026-04-24 · 2 obs

● 2015-08-14 23:08:30
● 2026-04-24 01:57:08

●NSns3.linode.com2015-08-14 → 2026-04-24 · 2 obs

● 2015-08-14 23:08:30
● 2026-04-24 01:57:08

●NSns4.linode.com2015-08-14 → 2026-04-24 · 2 obs

● 2015-08-14 23:08:30
● 2026-04-24 01:57:08

●NSns5.linode.com2015-08-14 → 2026-04-24 · 2 obs

● 2015-08-14 23:08:30
● 2026-04-24 01:57:08

○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
○ 2026-04-24 01:57:08

○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
○ 2026-04-24 01:57:08

○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
○ 2026-04-24 01:57:08

○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
○ 2026-04-24 01:57:08

○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
○ 2026-04-24 01:57:08

●MXmail.protonmail.ch2026-02-24 → 2026-04-24 · 3 obs

○ 2017-04-04 09:17:36
● 2026-02-24 21:01:12
● 2026-04-24 01:57:08

●MXmailsec.protonmail.ch2026-02-24 → 2026-04-24 · 3 obs

○ 2017-04-04 09:17:36
● 2026-02-24 21:01:12
● 2026-04-24 01:57:08

●A104.237.159.632026-02-24 → 2026-04-24 · 3 obs

○ 2017-04-04 09:17:36
● 2026-02-24 21:01:12
● 2026-04-24 01:57:08

○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
○ 2026-04-24 01:57:08

●A2600:3c01::f03c:93ff:fefc:8fa02026-02-24 → 2026-04-24 · 3 obs

○ 2017-04-04 09:17:36
● 2026-02-24 21:01:12
● 2026-04-24 01:57:08

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org	-
stackoverflow.org	ns3.linode.com, ns5.linode.com, ns4.linode.com, ns2.linode.com...	-

✅ Authoritative Response

Server:92.123.95.3

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for stackoverflow.org (unsigned zone)

⏱️ Timing

Total: 1318ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`104.237.159.63`
AAAA	1	`2600:3c01::f03c:93ff:fefc:8fa0`
NS	5	`ns1.linode.com, ns4.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 has stackoverflow.org as its parent.

IP Addresses

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

Other host names, for instance netninja.org, www.stackoverflow.org, mail.vanishingpointwiki.com, mail.perplexcitywiki.com and mail.nja.me share IP numbers with stackoverflow.org.

Name Servers

stackoverflow.org delegates to five name servers: ns1.linode.com, ns2.linode.com, ns3.linode.com, ns4.linode.com and ns5.linode.com.

stackoverflow.org at least partially shares name servers with other domains such as guzcloud.com, ryanlainchbury.com, trinix.com.br, student.fi and niagarabnb.ca.

Two IPs per host name:

ns1.linode.com points to: 2600:14c0:6::2 and 92.123.94.2

ns2.linode.com points to: 2600:14c0:6::3 and 92.123.94.3

ns3.linode.com points to: 2600:14c0:7::3 and 92.123.95.3

ns4.linode.com points to: 2600:14c0:7::4 and 92.123.95.4

ns5.linode.com points to: 2600:14c0:7::2 and 92.123.95.2

Pattern: left IDs ascend by 9 (12, 21, 30, 39, 48); each pair of targets ascend by 9 (15/18, 24/27, 33/36, 42/45, 51/54)

Mail Servers

Two mail servers handle stackoverflow.org: 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, void-x.com and bighefty.com.

stackoverflow.org shares mail servers with other domains at least in part, for instance elektropost.net, behzad.email, dns10.com, rotating.equipment and mcgrandle.com.

Host names with three IP numbers:

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.

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`