colearn.com - dns.ninja

`colearn.com`

DNSSEC	⚠️ Not signed
A	3.131.150.69^{🇺🇸 Amazon3.131.0.0/16 EC2 CMH prefix}
		PTR	`ec2-3-131-150-69.us-east-2.compute.amazonaws.com`
NS	`ns1.dnsimple.com` ⭐
		A	2620:111:8004::53^{🇺🇸 AS327712620:111:8004::/48 DNSimple Corporation}
		A	199.247.152.53^{🇺🇸 AS32771199.247.152.0/24 DNSimple Corporation}
NS	`ns2.dnsimple.com`
		A	2620:111:8005::53^{🇺🇸 AS327712620:111:8005::/48 Vultr Customer Route}
		A	199.247.153.53^{🇺🇸 AS32771199.247.153.0/24 Vultr Customer Route}
NS	`ns3.dnsimple.com`
		A	2620:111:8006::53^{🇺🇸 AS327712620:111:8006::/48 DNSimple Corporation}
		A	199.247.154.53^{🇺🇸 AS32771199.247.154.0/24 DNSimple Corporation}
NS	`ns4.dnsimple.com`
		A	2620:111:8007::53^{🇺🇸 AS327712620:111:8007::/48 Vultr Customer Route}
		A	199.247.155.53^{🇺🇸 AS32771199.247.155.0/24 Vultr Customer Route}
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c1f::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`pd-in-f27.1e100.net`
		A	172.253.139.27^{🇺🇸 Google172.253.139.0/24}
			PTR	`yuiadsk-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1a^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.26^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f26.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2a00:1450:400b:c02::1b^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f27.1e100.net`
		A	172.253.116.26^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f26.1e100.net`
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:4009:c0f::1b^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f27.1e100.net`
		A	192.178.223.27^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f27.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:400c:c23::1b^{🇧🇪 Google2a00:1450:400c::/48}
			PTR	`yubrupd-in-f27.1e100.net`
		A	172.253.157.26^{🇺🇸 Google172.253.0.0/16}
			PTR	`yubrupd-in-f26.1e100.net`
TXT	`google-site-verification=Pq_Yqfj-rKbISk9nlGhuLE59n-4-_ylM1iR7-vv50V0`
TXT	`google-site-verification=pfRPoLTLTnr8o0wbw9_vlZDAgVx3nksjzh3aHSn-Ugo`
TXT	`v=spf1 include:spf.mandrillapp.com include:21491723.spf02.hubspotemail.net in...`
SOA	`ns1.dnsimple.com`admin@dnsimple.com serial=1597226268

`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=1784122737

WOT: SAFE (70/100)

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DNS History

25 records (10 active, 15 former)

○NScss-dc1.css.local2015-11-29 → 2017-03-28 · 5 obs

○ 2015-08-05 07:35:58
● 2015-11-29 05:26:18
● 2017-03-28 15:45:02
○ 2026-02-17 00:44:50
○ 2026-07-15 14:03:06

○NScss-dc2.css.local2015-11-29 → 2017-03-28 · 5 obs

○ 2015-08-05 07:35:58
● 2015-11-29 05:26:18
● 2017-03-28 15:45:02
○ 2026-02-17 00:44:50
○ 2026-07-15 14:03:06

○NSdc1.css.local2015-08-05 → 2017-03-28 · 5 obs

● 2015-08-05 07:35:58
○ 2015-11-29 05:26:18
● 2017-03-28 15:45:02
○ 2026-02-17 00:44:50
○ 2026-07-15 14:03:06

○NSdc2.css.local2015-08-05 → 2017-03-28 · 5 obs

● 2015-08-05 07:35:58
○ 2015-11-29 05:26:18
● 2017-03-28 15:45:02
○ 2026-02-17 00:44:50
○ 2026-07-15 14:03:06

○NSmid8.ns1.sslparking.com2026-02-17 → 2026-02-20 · 5 obs

○ 2017-03-28 15:45:02
● 2026-02-17 00:44:50
● 2026-02-20 03:32:42
○ 2026-02-21 16:29:00
○ 2026-07-15 14:03:06

○NSmid8.ns2.sslparking.com2026-02-17 → 2026-02-20 · 5 obs

○ 2017-03-28 15:45:02
● 2026-02-17 00:44:50
● 2026-02-20 03:32:42
○ 2026-02-21 16:29:00
○ 2026-07-15 14:03:06

○NSns1.csscenter.com2015-08-05 → 2017-03-28 · 4 obs

● 2015-08-05 07:35:58
● 2017-03-28 15:45:02
○ 2026-02-17 00:44:50
○ 2026-07-15 14:03:06

●NSns1.dnsimple.com2026-02-21 → 2026-07-15 · 4 obs

○ 2026-02-17 00:44:50
○ 2026-02-20 03:32:42
● 2026-02-21 16:29:00
● 2026-07-15 14:03:06

○NSns2.csscenter.com2015-08-05 → 2017-03-28 · 4 obs

● 2015-08-05 07:35:58
● 2017-03-28 15:45:02
○ 2026-02-17 00:44:50
○ 2026-07-15 14:03:06

●NSns2.dnsimple.com2026-02-21 → 2026-07-15 · 4 obs

○ 2026-02-17 00:44:50
○ 2026-02-20 03:32:42
● 2026-02-21 16:29:00
● 2026-07-15 14:03:06

○NSns3.csscenter.com2015-08-05 → 2017-03-28 · 4 obs

● 2015-08-05 07:35:58
● 2017-03-28 15:45:02
○ 2026-02-17 00:44:50
○ 2026-07-15 14:03:06

●NSns3.dnsimple.com2026-02-21 → 2026-07-15 · 4 obs

○ 2026-02-17 00:44:50
○ 2026-02-20 03:32:42
● 2026-02-21 16:29:00
● 2026-07-15 14:03:06

●NSns4.dnsimple.com2026-02-21 → 2026-07-15 · 4 obs

○ 2026-02-17 00:44:50
○ 2026-02-20 03:32:42
● 2026-02-21 16:29:00
● 2026-07-15 14:03:06

●MXalt1.aspmx.l.google.com2026-02-17 → 2026-07-15 · 5 obs

○ 2017-03-28 15:45:02
● 2026-02-17 00:44:50
○ 2026-02-20 03:32:42
● 2026-02-21 16:29:00
● 2026-07-15 14:03:06

●MXalt2.aspmx.l.google.com2026-02-17 → 2026-07-15 · 5 obs

○ 2017-03-28 15:45:02
● 2026-02-17 00:44:50
○ 2026-02-20 03:32:42
● 2026-02-21 16:29:00
● 2026-07-15 14:03:06

●MXalt3.aspmx.l.google.com2026-02-17 → 2026-07-15 · 5 obs

○ 2017-03-28 15:45:02
● 2026-02-17 00:44:50
○ 2026-02-20 03:32:42
● 2026-02-21 16:29:00
● 2026-07-15 14:03:06

●MXalt4.aspmx.l.google.com2026-02-17 → 2026-07-15 · 5 obs

○ 2017-03-28 15:45:02
● 2026-02-17 00:44:50
○ 2026-02-20 03:32:42
● 2026-02-21 16:29:00
● 2026-07-15 14:03:06

●MXaspmx.l.google.com2026-02-17 → 2026-07-15 · 5 obs

○ 2017-03-28 15:45:02
● 2026-02-17 00:44:50
○ 2026-02-20 03:32:42
● 2026-02-21 16:29:00
● 2026-07-15 14:03:06

○MXcolearn-com.mail.protection.outlook.com2017-03-28 → 2026-02-17 · 5 obs

○ 2016-07-16 00:48:10
● 2017-03-28 15:45:02
● 2026-02-17 00:44:50
○ 2026-02-20 03:32:42
○ 2026-07-15 14:03:06

○MXinbound10.us.elephantoutlook.com2015-08-05 → 2016-07-16 · 4 obs

● 2015-08-05 07:35:58
● 2016-07-16 00:48:10
○ 2017-03-28 15:45:02
○ 2026-07-15 14:03:06

○MXinbound20.us.elephantoutlook.com2015-08-05 → 2016-07-16 · 4 obs

● 2015-08-05 07:35:58
● 2016-07-16 00:48:10
○ 2017-03-28 15:45:02
○ 2026-07-15 14:03:06

○MXinbound30.us.elephantoutlook.com2015-08-05 → 2016-07-16 · 4 obs

● 2015-08-05 07:35:58
● 2016-07-16 00:48:10
○ 2017-03-28 15:45:02
○ 2026-07-15 14:03:06

○A198.31.197.1522015-08-05 → 2017-03-28 · 4 obs

● 2015-08-05 07:35:58
● 2017-03-28 15:45:02
○ 2026-02-17 00:44:50
○ 2026-07-15 14:03:06

●A3.131.150.692026-02-21 → 2026-07-15 · 4 obs

○ 2026-02-17 00:44:50
○ 2026-02-20 03:32:42
● 2026-02-21 16:29:00
● 2026-07-15 14:03:06

○A65.21.178.242026-02-17 → 2026-02-20 · 5 obs

○ 2017-03-28 15:45:02
● 2026-02-17 00:44:50
● 2026-02-20 03:32:42
○ 2026-02-21 16:29:00
○ 2026-07-15 14:03:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	b.gtld-servers.net, j.gtld-servers.net, a.gtld-servers.net, l.gtld-servers.net...	-
colearn.com	ns1.dnsimple.com, ns2.dnsimple.com, ns3.dnsimple.com, ns4.dnsimple.com	8 records

✅ Authoritative Response

Server:199.247.154.53

NS records: ns1.dnsimple.com, ns2.dnsimple.com, ns3.dnsimple.com, ns4.dnsimple.com

🔒 DNSSEC Status

❌ Bogus (DNSSEC validation failed)

Validation error at com: Error: DNS query timeout: 192.33.14.30 for DNSKEY com

⏱️ Timing

Total: 3175ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`3.131.150.69`
NS	4	`ns1.dnsimple.com, ns2.dnsimple.com...`
MX	5	`aspmx.l.google.com (pri: 1), alt1.aspmx.l.google.com (pri: 5)...`
TXT	3	`google-site-verification=Pq_Yqfj-rKbISk9, google-site-verification=pfRPoLTLTnr8o0w...`
SOA	1	`ns1.dnsimple.com admin.dnsimple.com`

📌 Glue Records Collected

Total: 8

Out-of-bailiwick: 8 (ns1.dnsimple.com, ns1.dnsimple.com, ns2.dnsimple.com...)

Analysis

IP Addresses

colearn.com has exactly one IP address — 3.131.150.69.

www.sectioncut.com, freightview2.com, correlation1.com plus two other host names have IP numbers in common with colearn.com.

Name Servers

Four name servers handle the delegation for colearn.com: ns1.dnsimple.com, ns2.dnsimple.com, ns3.dnsimple.com and ns4.dnsimple.com.

The name servers of colearn.com overlap at least partially with those of other domains — among them aaerfusion.com.au, lovableedge.com, agelessrx.com and two more.

The name servers ns4.dnsimple-edge.org, ns2.dnsimple-edge.net and axfr.dnsimple.com are commonly seen alongside these name servers.

Each of the four hosts ns1.dnsimple.com, ns2.dnsimple.com, ns3.dnsimple.com and ns4.dnsimple.com has two IP addresses. ns1.dnsimple.com points to 199.247.152.53 and 2620:111:8004::53. ns2.dnsimple.com points to 199.247.153.53 and 2620:111:8005::53. ns3.dnsimple.com points to 199.247.154.53 and 2620:111:8006::53. ns4.dnsimple.com points to 199.247.155.53 and 2620:111:8007::53.

Mail Servers

Five mail servers handle colearn.com: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

At least some of the mail servers used by colearn.com are shared with other domains: nejmatech.com, tsjh.tc.edu.tw, csjh.tc.edu.tw and two others among them.

These mail servers are often deployed together with alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx2.googlemail.com and 3 other mail servers.

Host names pointing to two IP addresses:

aspmx.l.google.com maps to two IP addresses — 172.253.139.27 and 2607:f8b0:4004:c1f::1b.

alt1.aspmx.l.google.com maps to two IP addresses — 108.177.123.26 and 2800:3f0:4003:c0f::1a.

alt2.aspmx.l.google.com maps to two IP addresses — 172.253.116.26 and 2a00:1450:400b:c02::1b.

alt3.aspmx.l.google.com maps to two IP addresses — 192.178.223.27 and 2a00:1450:4009:c0f::1b.

alt4.aspmx.l.google.com maps to two IP addresses — 172.253.157.26 and 2a00:1450:400c:c23::1b.