api.coursehero.com - dns.ninja

`api.coursehero.com`

CNAME	`d50ijvl6z7o2z.cloudfront.net`
DNSSEC	⚠️ Not signed
A	3.170.3.4^{🇺🇸 Amazon3.170.3.0/24}
		PTR	`server-3-170-3-4.iad55.r.cloudfront.net`
A	3.170.3.40^{🇺🇸 Amazon3.170.3.0/24}
A	3.170.3.58^{🇺🇸 Amazon3.170.3.0/24}
A	3.170.3.89^{🇺🇸 Amazon3.170.3.0/24}
NS	`ns-254.awsdns-31.com` ⭐
		A	2600:9000:5300:fe00::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-254.awsdns-31.com`
		A	205.251.192.254^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-254.awsdns-31.com`
NS	`ns-1239.awsdns-26.org`
		A	2600:9000:5304:d700::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1239.awsdns-26.org`
		A	205.251.196.215^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1239.awsdns-26.org`
NS	`ns-2014.awsdns-59.co.uk`
		A	2600:9000:5307:de00::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-2014.awsdns-59.co.uk`
		A	205.251.199.222^{🇺🇸 Amazon205.251.199.0/24 prefix}
			PTR	`ns-2014.awsdns-59.co.uk`
NS	`ns-598.awsdns-10.net`
		A	2600:9000:5302:5600::1^{🇺🇸 Amazon2600:9000:5302::/48 - CloudFront}
			PTR	`ns-598.awsdns-10.net`
		A	205.251.194.86^{🇺🇸 Amazon205.251.194.0/24 prefix}
			PTR	`ns-598.awsdns-10.net`
HTTPS	HTTP/2
SOA	`ns-254.awsdns-31.com`awsdns-hostmaster@amazon.com serial=1

`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` ⭐
NS	`bob.ns.cloudflare.com`
MX	`aspmx.l.google.com` ⭐
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
MX	`aspmx2.googlemail.com`⁽¹⁰⁾
MX	`aspmx3.googlemail.com`⁽¹⁰⁾
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

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

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DNS History

1 record (1 active, 0 former)

●CNAMEd50ijvl6z7o2z.cloudfront.net2018-05-09 → 2026-08-12 · 2 obs

● 2018-05-09 03:53:10
● 2026-08-12 19:33:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	e.gtld-servers.net, l.gtld-servers.net, k.gtld-servers.net, b.gtld-servers.net...	-
coursehero.com	bob.ns.cloudflare.com, ali.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.104

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: 190ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`d50ijvl6z7o2z.cloudfront.net`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

api.coursehero.com directs to four IP numbers, which are 3.170.3.4, 3.170.3.40, 3.170.3.58 and 3.170.3.89.

Additional host names — www.datacrunchglobal.com, daon.co.jp, 118944.com and two others — share IP numbers with api.coursehero.com.

Name Servers

api.coursehero.com has four authoritative name servers: ns-254.awsdns-31.com, ns-598.awsdns-10.net, ns-1239.awsdns-26.org and ns-2014.awsdns-59.co.uk.

There is at least partial name server overlap between api.coursehero.com and other domains — zayzoon.com, andrewtechllc.com, oncotypedx.info and two more among them.

All four hostnames — ns-254.awsdns-31.com, ns-598.awsdns-10.net, ns-1239.awsdns-26.org and ns-2014.awsdns-59.co.uk — resolve to two IP numbers apiece: ns-254.awsdns-31.com to 205.251.192.254 and 2600:9000:5300:fe00::1; ns-598.awsdns-10.net to 205.251.194.86 and 2600:9000:5302:5600::1; ns-1239.awsdns-26.org to 205.251.196.215 and 2600:9000:5304:d700::1; ns-2014.awsdns-59.co.uk to 205.251.199.222 and 2600:9000:5307:de00::1.