coursehero.com - dns.ninja

`coursehero.com`

DNSSEC	⚠️ Not signed
A	104.17.142.115^{Cloudflare104.17.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.17.143.115^{Cloudflare104.17.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`ali.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a3b^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ali.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c03b^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`ali.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:203b^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`ali.ns.cloudflare.com`
		A	108.162.192.59^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ali.ns.cloudflare.com`
		A	172.64.32.59^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ali.ns.cloudflare.com`
		A	173.245.58.59^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ali.ns.cloudflare.com`
NS	`bob.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b68^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bob.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c168^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`bob.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2168^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`bob.ns.cloudflare.com`
		A	108.162.193.104^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bob.ns.cloudflare.com`
		A	172.64.33.104^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bob.ns.cloudflare.com`
		A	173.245.59.104^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bob.ns.cloudflare.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c09::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bh-in-f27.1e100.net`
		A	142.251.167.27^{🇺🇸 Google142.251.167.0/24}
			PTR	`ww-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c14::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	192.178.234.26^{🇺🇸 Google192.178.0.0/15}
			PTR	`ncsclj-in-f26.1e100.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	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:4009:c0f::1a^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f26.1e100.net`
		A	192.178.223.26^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f26.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:400c:c23::1a^{🇧🇪 Google2a00:1450:400c::/48}
			PTR	`yubrupd-in-f26.1e100.net`
		A	172.253.157.26^{🇺🇸 Google172.253.0.0/16}
			PTR	`yubrupd-in-f26.1e100.net`
MX	`aspmx2.googlemail.com`⁽¹⁰⁾
		A	2800:3f0:4003:c14::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	192.178.234.26^{🇺🇸 Google192.178.0.0/15}
			PTR	`ncsclj-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	`5652918DDF`
TXT	`ZOOM_verify_5AZchnB9Sbu3g5a7AT4-tQ`
TXT	`_globalsign-domain-verification=vfSqdWg_oFkzJ2vuWdXgelF4hXGoMazrjSFpCwGkIr`
TXT	`adobe-idp-site-verification=8b9b597326c953485203409a584c256ae5300d4628d2c614d...`
TXT	`anthropic-domain-verification-pf9xw7=KfxDXaYmxfEGnWRVFqIufoEmc`
TXT	`apple-domain-verification=J9HXwKKbosffcUqk`
TXT	`atlassian-domain-verification=HuZkEy3RvMSIX6gZ/iF9B/EYH1awgocgR2HXxCaOZLQhFSS...`
TXT	`beam-verification=ztlMjatDnztNkQvw8YU4sYwvBQQ6BpBswpmOGXUKrBHAnKhx`
TXT	`cursor-domain-verification-mqkys8=xlPNXlbiVQnaxZlmsW9WuEsaz`
TXT	`globalsign-domain-verification=2eaa5b27a77c2daddf7a4de4d1d0b631`
TXT	`globalsign-domain-verification=3C4ABCC9F5A84CF68ED95BDA94D6AA6F`
TXT	`globalsign-domain-verification=6902DC280BCC210C04267DF54E536CF3`
TXT	`globalsign-domain-verification=6I41XwGS3W3RH3qcFMFl4OEqtMzo9xTMeWN8-mrBax`
TXT	`globalsign-domain-verification=6f8ab1bf5972d1fec2bed8c50fc8f17f`
TXT	`globalsign-domain-verification=9AC94274374646C0309FBF52D4C347E5`
TXT	`globalsign-domain-verification=d02224fcdd31e8326ec4e62e02896e6e`
TXT	`google-site-verification=3pQ5xK_nyepze4YXPQl_B0s_ctK-MbTPs1wcsI4rtc0`
TXT	`google-site-verification=Gyhx5Lm9qP9uXBuUizeZ4rO-RyZBKZtClazCwKnDcek`
TXT	`hzlh1s4kn3zrz66vng5sdxkc1fc5088m`
TXT	`miro-verification=cd41ffb512f978da767f4d40547aad9ce48ac4e2`
TXT	`notion-domain-verification=GFEyibYsGkk66J48iv0lbsClXxUjI4AuMhpkEVzsWdV`
TXT	`v=spf1 a mx include:_spf.google.com include:mail.zendesk.com include:amazonse...`
HTTPS	HTTP/2 ✓ hints match
		IPv4 hints	104.17.142.115, 104.17.143.115
SOA	`ali.ns.cloudflare.com`dns@cloudflare.com serial=2411390689

`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=1786558434

rank #9939 globally
rank #4850 in the tld
🔒 HSTS Preload (+subdomains)
📈 Tranco rank: #14,988

PTR for

177.218.143.174.in-addr.arpa

Subdomains

support.coursehero.com

dev.coursehero.com

vpn.coursehero.com

interact2.coursehero.com

gtm.coursehero.com

wikinew.coursehero.com

events.coursehero.com

wiki.coursehero.com

api.coursehero.com

wss.coursehero.com

lifecycle.coursehero.com

assets.coursehero.com

mail.coursehero.com

mi.coursehero.com

www.coursehero.com

email.coursehero.com

websockets1.coursehero.com

Same first word

Similar names

herocourse.com

sourceheor.com

herosource.com

sourcehero.com

DNS History

29 records (11 active, 18 former)

○NSa1-13.akam.net2016-09-06 → 2017-03-07 · 5 obs

○ 2016-06-06 00:00:50
● 2016-09-06 22:57:30
● 2017-03-07 19:04:36
○ 2017-07-04 03:29:32
○ 2026-08-12 18:43:20

○NSa10-64.akam.net2016-09-06 → 2017-03-07 · 5 obs

○ 2016-06-06 00:00:50
● 2016-09-06 22:57:30
● 2017-03-07 19:04:36
○ 2017-07-04 03:29:32
○ 2026-08-12 18:43:20

○NSa11-65.akam.net2016-09-06 → 2017-03-07 · 5 obs

○ 2016-06-06 00:00:50
● 2016-09-06 22:57:30
● 2017-03-07 19:04:36
○ 2017-07-04 03:29:32
○ 2026-08-12 18:43:20

○NSa14-66.akam.net2016-09-06 → 2017-03-07 · 5 obs

○ 2016-06-06 00:00:50
● 2016-09-06 22:57:30
● 2017-03-07 19:04:36
○ 2017-07-04 03:29:32
○ 2026-08-12 18:43:20

○NSa4-67.akam.net2016-09-06 → 2017-03-07 · 5 obs

○ 2016-06-06 00:00:50
● 2016-09-06 22:57:30
● 2017-03-07 19:04:36
○ 2017-07-04 03:29:32
○ 2026-08-12 18:43:20

○NSa9-64.akam.net2016-09-06 → 2017-03-07 · 5 obs

○ 2016-06-06 00:00:50
● 2016-09-06 22:57:30
● 2017-03-07 19:04:36
○ 2017-07-04 03:29:32
○ 2026-08-12 18:43:20

●NSali.ns.cloudflare.com2017-07-04 → 2026-08-12 · 3 obs

○ 2017-03-07 19:04:36
● 2017-07-04 03:29:32
● 2026-08-12 18:43:20

●NSbob.ns.cloudflare.com2017-07-04 → 2026-08-12 · 3 obs

○ 2017-03-07 19:04:36
● 2017-07-04 03:29:32
● 2026-08-12 18:43:20

○NSns.rackspace.com2008-12-10 → 2016-09-06 · 4 obs

● 2008-12-10 04:06:06
● 2016-09-06 22:57:30
○ 2016-12-09 09:08:32
○ 2026-08-12 18:43:20

○NSns2.rackspace.com2008-12-10 → 2016-06-06 · 4 obs

● 2008-12-10 04:06:06
● 2016-06-06 00:00:50
○ 2016-09-06 22:57:30
○ 2026-08-12 18:43:20

●MXalt1.aspmx.l.google.com2008-12-10 → 2026-08-12 · 2 obs

● 2008-12-10 04:06:06
● 2026-08-12 18:43:20

●MXalt2.aspmx.l.google.com2008-12-10 → 2026-08-12 · 2 obs

● 2008-12-10 04:06:06
● 2026-08-12 18:43:20

●MXalt3.aspmx.l.google.com2026-03-13 → 2026-08-12 · 3 obs

○ 2020-01-25 22:52:14
● 2026-03-13 08:39:08
● 2026-08-12 18:43:20

●MXalt4.aspmx.l.google.com2026-03-13 → 2026-08-12 · 3 obs

○ 2020-01-25 22:52:14
● 2026-03-13 08:39:08
● 2026-08-12 18:43:20

●MXaspmx.l.google.com2008-12-10 → 2026-08-12 · 2 obs

● 2008-12-10 04:06:06
● 2026-08-12 18:43:20

●MXaspmx2.googlemail.com2008-12-10 → 2026-08-12 · 2 obs

● 2008-12-10 04:06:06
● 2026-08-12 18:43:20

●MXaspmx3.googlemail.com2008-12-10 → 2026-08-12 · 2 obs

● 2008-12-10 04:06:06
● 2026-08-12 18:43:20

○MXtmpmail.coursehero.com2015-07-15 → 2019-09-02 · 5 obs

○ 2008-12-10 04:06:06
● 2015-07-15 01:45:48
● 2019-09-02 02:22:24
○ 2020-01-25 22:52:14
○ 2026-08-12 18:43:20

○A104.16.147.2242017-07-04 → 2018-12-15 · 5 obs

○ 2017-03-07 19:04:36
● 2017-07-04 03:29:32
● 2018-12-15 23:19:26
○ 2019-05-25 23:09:26
○ 2026-08-12 18:43:20

○A104.16.148.2242017-07-04 → 2018-12-15 · 5 obs

○ 2017-03-07 19:04:36
● 2017-07-04 03:29:32
● 2018-12-15 23:19:26
○ 2019-05-25 23:09:26
○ 2026-08-12 18:43:20

○A104.16.149.2242017-07-04 → 2018-12-15 · 5 obs

○ 2017-03-07 19:04:36
● 2017-07-04 03:29:32
● 2018-12-15 23:19:26
○ 2019-05-25 23:09:26
○ 2026-08-12 18:43:20

○A104.16.150.2242017-07-04 → 2018-12-15 · 5 obs

○ 2017-03-07 19:04:36
● 2017-07-04 03:29:32
● 2018-12-15 23:19:26
○ 2019-05-25 23:09:26
○ 2026-08-12 18:43:20

○A104.16.151.2242017-07-04 → 2018-12-15 · 5 obs

○ 2017-03-07 19:04:36
● 2017-07-04 03:29:32
● 2018-12-15 23:19:26
○ 2019-05-25 23:09:26
○ 2026-08-12 18:43:20

●A104.17.142.1152026-03-13 → 2026-08-12 · 3 obs

○ 2021-12-03 17:51:48
● 2026-03-13 08:39:08
● 2026-08-12 18:43:20

●A104.17.143.1152026-03-13 → 2026-08-12 · 3 obs

○ 2021-12-03 17:51:48
● 2026-03-13 08:39:08
● 2026-08-12 18:43:20

○A104.17.92.472019-05-25 → 2021-12-03 · 5 obs

○ 2018-12-15 23:19:26
● 2019-05-25 23:09:26
● 2021-12-03 17:51:48
○ 2026-03-13 08:39:08
○ 2026-08-12 18:43:20

○A104.17.93.472019-05-25 → 2021-12-03 · 5 obs

○ 2018-12-15 23:19:26
● 2019-05-25 23:09:26
● 2021-12-03 17:51:48
○ 2026-03-13 08:39:08
○ 2026-08-12 18:43:20

○A174.143.218.1772015-07-15 → 2017-03-07 · 5 obs

○ 2008-12-10 04:06:06
● 2015-07-15 01:45:48
● 2017-03-07 19:04:36
○ 2017-07-04 03:29:32
○ 2026-08-12 18:43:20

○A98.129.60.2492008-12-10 → 2008-12-10 · 3 obs

● 2008-12-10 04:06:06
○ 2015-07-15 01:45:48
○ 2026-08-12 18:43:20

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	i.gtld-servers.net, d.gtld-servers.net, b.gtld-servers.net, f.gtld-servers.net...	-
coursehero.com	bob.ns.cloudflare.com, ali.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.192.59

NS records: bob.ns.cloudflare.com, ali.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for coursehero.com (unsigned zone)

⏱️ Timing

Total: 359ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.17.143.115, 104.17.142.115`
NS	2	`ali.ns.cloudflare.com, bob.ns.cloudflare.com`
MX	7	`aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)...`
TXT	22	`5652918DDF, ZOOM_verify_5AZchnB9Sbu3g5a7AT4-tQ...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h2"]`
SOA	1	`ali.ns.cloudflare.com dns.cloudflare.com`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (bob.ns.cloudflare.com, bob.ns.cloudflare.com, bob.ns.cloudflare.com...)

Analysis

Hierarchy

support.coursehero.com, dev.coursehero.com, vpn.coursehero.com, interact2.coursehero.com, gtm.coursehero.com and a few other host names are all children of coursehero.com.

IP Addresses

coursehero.com has two IP addresses: 104.17.142.115 and 104.17.143.115

Additional host names — vpn.coursehero.com, gtm.coursehero.com, wiki.coursehero.com and two others — share IP numbers with coursehero.com.

Name Servers

Two name servers handle the delegation for coursehero.com: ali.ns.cloudflare.com and bob.ns.cloudflare.com.

coursehero.com shares its name server setup with other domains, including craftanddesign.com, youthworkpathways.net, coursesidekick.com and two others.

The name servers of coursehero.com overlap at least partially with those of other domains — among them ministorage.com, you2md.com, hotellkajutan.se and two more.

These name servers commonly appear alongside the name servers earl.ns.cloudflare.com and matteo.ns.cloudflare.com.

Host names with 6 IP numbers:

ali.ns.cloudflare.com resolves to 108.162.192.59, 172.64.32.59 and 173.245.58.59 among others, with 3 other IP addresses in total.

bob.ns.cloudflare.com resolves to 108.162.193.104, 172.64.33.104 and 173.245.59.104 among others, with 3 other IP addresses in total.

Mail Servers

coursehero.com has 7 mail servers — aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com plus 4 other.

coursehero.com shares mail servers — at least in part — with other domains, including ns500731.ns500742.ns500731.ns500742.ns500754.ns500704.ns500704.ns500688.ns500671.ns500649.ns500688.ns500649.ns500291.ns500291.ns500291.ns500131.lustychickser.com, ns500768.ns500698.ns500698.ns500735.ns500698.ns500698.ns500698.ns500735.ns500735.ns500698.ns500736.ns500576.ns500698.ns500576.ns500652.trackreceptor.com, musikmittelschule-lambach.at and two others.

These mail servers are frequently used alongside mail servers alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and 3 other.

Host names with two IP numbers:

aspmx2.googlemail.com resolves to two addresses: 192.178.234.26 and 2800:3f0:4003:c14::1b.

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

aspmx.l.google.com resolves to two addresses: 142.251.167.27 and 2607:f8b0:4004:c09::1b.

alt1.aspmx.l.google.com resolves to two addresses: 192.178.234.26 and 2800:3f0:4003:c14::1b.

alt2.aspmx.l.google.com resolves to two addresses: 172.253.116.26 and 2a00:1450:400b:c02::1a.

alt3.aspmx.l.google.com resolves to two addresses: 192.178.223.26 and 2a00:1450:4009:c0f::1a.

alt4.aspmx.l.google.com resolves to two addresses: 172.253.157.26 and 2a00:1450:400c:c23::1a.

aspmx2.googlemail.com along with alt1.aspmx.l.google.com each resolve to 2800:3f0:4003:c14::1b IP addresses.

aspmx2.googlemail.com along with alt1.aspmx.l.google.com each resolve to 192.178.234.26 IP addresses.