course.work - dns.ninja

`course.work`

DNSSEC	⚠️ Not signed
A	18.224.238.59^{🇺🇸 Amazon18.224.0.0/14 EC2 CMH prefix}
		PTR	`ec2-18-224-238-59.us-east-2.compute.amazonaws.com`
NS	`marjory.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3ac1^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`marjory.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0c1^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`marjory.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20c1^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`marjory.ns.cloudflare.com`
		A	108.162.192.193^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`marjory.ns.cloudflare.com`
		A	172.64.32.193^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`marjory.ns.cloudflare.com`
		A	173.245.58.193^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`marjory.ns.cloudflare.com`
NS	`phil.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b89^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`phil.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c189^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`phil.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2189^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`phil.ns.cloudflare.com`
		A	108.162.193.137^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`phil.ns.cloudflare.com`
		A	172.64.33.137^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`phil.ns.cloudflare.com`
		A	173.245.59.137^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`phil.ns.cloudflare.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c1f::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`pd-in-f27.1e100.net`
		A	192.178.155.27^{🇺🇸 Google192.178.155.0/24}
			PTR	`yuiadrs-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1a^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.27^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f27.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2a00:1450:400b:c02::1a^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f26.1e100.net`
		A	172.253.116.26^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f26.1e100.net`
MX	`aspmx2.googlemail.com`⁽¹⁰⁾
		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	`aspmx3.googlemail.com`⁽¹⁰⁾
		A	2a00:1450:400b:c02::1b^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f27.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
TXT	`google-site-verification=mtiMfQKBa4jUtWbAKvsgr16ddJTatSWBTj2HIa6hQjE`
TXT	`v=spf1 include:_spf.google.com include:spf.mandrillapp.com ~all`
SOA	`marjory.ns.cloudflare.com`dns@cloudflare.com serial=2409733781

`work`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.nic.work` ⭐
	NS	`b.nic.work`
	NS	`c.nic.work`
	NS	`x.nic.work`
	NS	`y.nic.work`
	NS	`z.nic.work`
	SOA	`a.nic.work`admin@tldns.godaddy serial=1784276023

Same first word

course.chat

course.ru

course.online

course.co.uk

course.cc

course.fr

course.us

course.pro

course.co.za

course.org

course.world

course.dk

course.center

course.rs

course.work

course.link

course.ist

course.ca

course.is

course.cn

course.biz

course.school

course.eu

course.tv

course.academy

course.camp

course.guru

course.be

course.ltd

course.net

course.care

course.com.tr

course.istanbul

course.ch

course.run

course.nl

course.ws

course.de

course.tours

course.pl

course.io

course.studio

course.im

course.lk

course.plus

course.gr

course.design

course.place

course.city

course.by

course.com

course.network

course.guide

course.org.il

course.media

course.mobi

course.edu.vn

course.company

course.kz

course.xyz

course.co

course.market

course.cafe

course.london

course.tc

course.la

course.it

course.am

course.info

course.institute

course.id

course.com.cn

course.coach

course.pub

course.careers

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source.azureedge.net

coeurs.fr

source.now

socure.io

source.clothing

ecours.es

source.org.au

source.engineering

uscore.no

source.family

ecours.ru

cueros.cl

crusoe.live

crouse.ca

source.lv

couser.net

sureco.it

source.co.kr

source.net

source.pm

sucore.com

source.ai

cureos.blogspot.ch

source.nl

escour.eu

eurocs.com.vn

source.black

crusoe.net

crusoe.it

resuco.com

securo.cz

ecosur.net

source.gg

source.tools

ucoser.net

source.es

source.org

roscue.de

rusceo.com

crusoe.biz

source.immo

scoure.com

source.xyz

source.la

source.s3.amazonaws.com

source.dk

sureco.com

sureco.life

source.nu

crusoe.com

source.tv

escour.be

source.holdings

source.it

cueros.es

crouse.cloud

serocu.org.uk

securo.nl

esourc.org

suorec.com.cn

ruesco.com

securo.in

source.gr

scoure.de

securo.org

securo.de

crouse.name

serocu.police.uk

oursec.com

source.mobi

source.hk

crouse.com

socure.biz

crusoe.com.br

securo.it

crusoe.ai

ecorus.dk

source.co

DNS History

11 records (8 active, 3 former)

●NSmarjory.ns.cloudflare.com2020-12-11 → 2026-07-17 · 3 obs

○ 2016-12-13 02:56:20
● 2020-12-11 20:39:52
● 2026-07-17 08:17:12

○NSns13.domaincontrol.com2016-12-13 → 2016-12-13 · 3 obs

● 2016-12-13 02:56:20
○ 2020-12-11 20:39:52
○ 2026-07-17 08:17:12

○NSns14.domaincontrol.com2016-12-13 → 2016-12-13 · 3 obs

● 2016-12-13 02:56:20
○ 2020-12-11 20:39:52
○ 2026-07-17 08:17:12

●NSphil.ns.cloudflare.com2020-12-11 → 2026-07-17 · 3 obs

○ 2016-12-13 02:56:20
● 2020-12-11 20:39:52
● 2026-07-17 08:17:12

●MXalt1.aspmx.l.google.com2016-12-13 → 2026-07-17 · 2 obs

● 2016-12-13 02:56:20
● 2026-07-17 08:17:12

●MXalt2.aspmx.l.google.com2016-12-13 → 2026-07-17 · 2 obs

● 2016-12-13 02:56:20
● 2026-07-17 08:17:12

●MXaspmx.l.google.com2016-12-13 → 2026-07-17 · 2 obs

● 2016-12-13 02:56:20
● 2026-07-17 08:17:12

●MXaspmx2.googlemail.com2016-12-13 → 2026-07-17 · 2 obs

● 2016-12-13 02:56:20
● 2026-07-17 08:17:12

●MXaspmx3.googlemail.com2016-12-13 → 2026-07-17 · 2 obs

● 2016-12-13 02:56:20
● 2026-07-17 08:17:12

●A18.224.238.592026-02-28 → 2026-07-17 · 3 obs

○ 2020-12-11 20:39:52
● 2026-02-28 12:02:32
● 2026-07-17 08:17:12

○A50.63.202.42016-12-13 → 2016-12-13 · 3 obs

● 2016-12-13 02:56:20
○ 2020-12-11 20:39:52
○ 2026-07-17 08:17:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
work	a.nic.work, b.nic.work, c.nic.work, x.nic.work...	12 records
course.work	phil.ns.cloudflare.com, marjory.ns.cloudflare.com	-

✅ Authoritative Response

Server:173.245.58.193

NS records: phil.ns.cloudflare.com, marjory.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for course.work (unsigned zone)

⏱️ Timing

Total: 596ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`18.224.238.59`
NS	2	`marjory.ns.cloudflare.com, phil.ns.cloudflare.com`
MX	5	`aspmx.l.google.com (pri: 1), aspmx2.googlemail.com (pri: 10)...`
TXT	2	`google-site-verification=mtiMfQKBa4jUtWb, v=spf1 include:_spf.google.com include:s`
SOA	1	`marjory.ns.cloudflare.com dns.cloudflare`

📌 Glue Records Collected

Total: 12

In-bailiwick: 12 (a.nic.work, a.nic.work, b.nic.work...)

Analysis

IP Addresses

course.work has exactly one IP address — 18.224.238.59.

Other host names share IP numbers with course.work; ec2-18-224-238-59.us-east-2.compute.amazonaws.com is one such example.

Name Servers

course.work is served by two delegated name servers, marjory.ns.cloudflare.com and phil.ns.cloudflare.com.

The name server configuration of course.work is shared with other domains, for instance tourmientaynambo.com, abnaamro.nl, wwwamazon.it and two others.

course.work partially shares its NS delegation with several other domains, including certifiedcleaningnyc.com, regards-connectes.fr, jlsm.org and two others.

These name servers are regularly seen alongside ray.ns.cloudflare.com and keenan.ns.cloudflare.com as name servers.

Hosts with 6 IP addresses each:

marjory.ns.cloudflare.com carries IP addresses 108.162.192.193, 172.64.32.193 and 173.245.58.193, with 3 other addresses beyond those.

phil.ns.cloudflare.com carries IP addresses 108.162.193.137, 172.64.33.137 and 173.245.59.137, with 3 other addresses beyond those.

Mail Servers

course.work is handled by five mail servers: aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com and two others.

At least some of the mail servers used by course.work are shared with other domains: ns500742.ns500754.ns500742.ns500731.ns500754.ns500754.ns500742.ns500704.ns500704.ns500704.ns500705.ns500671.lustychickser.com, kvplast.ru, fiti-oameni.ro and two others among them.

These mail servers are often deployed together with alt2.aspmx.l.google.com, alt1.aspmx.l.google.com, alt3.aspmx.l.google.com and 3 other mail servers.

Host names pointing to two IP addresses:

aspmx2.googlemail.com maps to two IP addresses — 108.177.123.26 and 2800:3f0:4003:c0f::1a.

aspmx3.googlemail.com maps to two IP addresses — 172.253.116.27 and 2a00:1450:400b:c02::1b.

aspmx.l.google.com maps to two IP addresses — 192.178.155.27 and 2607:f8b0:4004:c1f::1b.

alt1.aspmx.l.google.com maps to two IP addresses — 108.177.123.27 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::1a.

These two host names — aspmx2.googlemail.com and alt1.aspmx.l.google.com — each point to 2800:3f0:4003:c0f::1a IP addresses.