`lifecycle.coursehero.com`

CNAME	`sparkpostmail.com`
DNSSEC	⚠️ Not signed
A	18.67.76.12^{🇺🇸 Amazon18.67.76.0/22}
		PTR	`server-18-67-76-12.iad89.r.cloudfront.net`
A	18.67.76.18^{🇺🇸 Amazon18.67.76.0/22}
A	18.67.76.70^{🇺🇸 Amazon18.67.76.0/22}
A	18.67.76.74^{🇺🇸 Amazon18.67.76.0/22}
NS	`ns-1855.awsdns-39.co.uk` ⭐
		A	2600:9000:5307:3f00::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-1855.awsdns-39.co.uk`
		A	205.251.199.63^{🇺🇸 Amazon205.251.199.0/24 prefix}
			PTR	`ns-1855.awsdns-39.co.uk`
NS	`ns-1361.awsdns-42.org`
		A	2600:9000:5305:5100::1^{🇺🇸 Amazon2600:9000:5305::/48 - CloudFront}
			PTR	`ns-1361.awsdns-42.org`
		A	205.251.197.81^{🇺🇸 Amazon205.251.197.0/24 prefix}
			PTR	`ns-1361.awsdns-42.org`
NS	`ns-304.awsdns-38.com`
		A	2600:9000:5301:3000::1^{🇺🇸 Amazon2600:9000:5301::/48 - CloudFront}
			PTR	`ns-304.awsdns-38.com`
		A	205.251.193.48^{🇺🇸 Amazon205.251.193.0/24 prefix}
			PTR	`ns-304.awsdns-38.com`
NS	`ns-775.awsdns-32.net`
		A	2600:9000:5303:700::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-775.awsdns-32.net`
		A	205.251.195.7^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-775.awsdns-32.net`
MX	`smtp.sparkpostmail.com` ⭐
		A	44.235.26.2^{🇺🇸 Amazon44.224.0.0/11 EC2 PDX prefix}
			PTR	`ec2-44-235-26-2.us-west-2.compute.amazonaws.com`
		A	52.43.60.44^{🇺🇸 Amazon52.40.0.0/14 EC2 PDX prefix}
			PTR	`ec2-52-43-60-44.us-west-2.compute.amazonaws.com`
		A	54.203.214.124^{🇺🇸 Amazon54.202.0.0/15 EC2 PDX prefix}
			PTR	`ec2-54-203-214-124.us-west-2.compute.amazonaws.com`
TXT	`202309142210142gjgf5fwokyagxwm41zux4qqpsky7k3ybnkqsbic1mlkhki0he`
TXT	`google-site-verification=yCMV3z3BhBaINi0V033HnfTi9xkQjpIZ4DM4ywSlwUs`
TXT	`v=spf1 exists:%{i}._spf.sparkpostmail.com ~all`
TXT	`yahoo-verification-key=3FbuT+COxdPHeqY8GDS1MS5lZ+Y4R0w0MCU5RmkGdic=`
SOA	`ns-1855.awsdns-39.co.uk`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	104.17.142.115, 104.17.143.115
SOA	`ali.ns.cloudflare.com`dns@cloudflare.com serial=2399264530

WOT: SAFE (74/100)
rank #8731 globally
rank #4299 in the tld
🔒 HSTS Preload (+subdomains)
WOT: SAFE (74/100)
📈 Tranco rank: #15,650

Subdomains

qwyz.lifecycle.coursehero.com

Same first word

Similar names

cyclelife.jp

cyclelife.be

cyclelife.co.uk

cyclefile.com

cyclelife.net

filecycle.com

DNS History

1 record (1 active, 0 former)

●CNAMEsparkpostmail.com2026-03-24 → 2026-03-24 · 2 obs

● 2026-03-24 06:32:46
● 2026-03-24 06:32:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	m.gtld-servers.net, h.gtld-servers.net, a.gtld-servers.net, l.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: 394ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`sparkpostmail.com`

📌 Glue Records Collected

Total: 12

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

Analysis

Hierarchy

The parent of qwyz.lifecycle.coursehero.com is lifecycle.coursehero.com.

IP Addresses

lifecycle.coursehero.com resolves to four IP numbers: 18.67.76.12, 18.67.76.18, 18.67.76.70 and 18.67.76.74.

Name Servers

lifecycle.coursehero.com is delegated to four name servers: ns-304.awsdns-38.com, ns-775.awsdns-32.net, ns-1361.awsdns-42.org and ns-1855.awsdns-39.co.uk.

lifecycle.coursehero.com at least partially shares name servers with other domains, for instance wincustomize.org, seiya.com.ar, californiaephemeraproject.org, signaturebydove.us and bmoregeo.com.

Host names with two IP numbers: ns-304.awsdns-38.com points to 2600:9000:5301:3000::1 and 205.251.193.48; ns-775.awsdns-32.net points to 2600:9000:5303:700::1 and 205.251.195.7; ns-1361.awsdns-42.org points to 2600:9000:5305:5100::1 and 205.251.197.81; ns-1855.awsdns-39.co.uk points to 2600:9000:5307:3f00::1 and 205.251.199.63.

Mail Servers

lifecycle.coursehero.com is handled by a single mail server, smtp.sparkpostmail.com.

The mail server setup for lifecycle.coursehero.com matches that of other domains, for instance mktg.myperfectresume.com, mail.grammarly.com, email.influitive.com, email.woodmagazine.com and mail.southernliving.com.

lifecycle.coursehero.com shares at least partially some mail servers with other domains, including urban.com.au, mail.skylum.com, freshprints.com, fiftyplus.com.tw and marketdeal.com.

these mail servers are often used with aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and alt4.aspmx.l.google.com.

Host smtp.sparkpostmail.com resolves to three IPs: 44.235.26.2, 52.43.60.44 and 54.203.214.124.

lifecycle.coursehero.com - robtex.com