dev.coursehero.com - dns.ninja
dev.coursehero.com
| CNAME | internal-a2c293152414111eab63b02f84701c5e-82471424.us-east-1.elb.amazonaws.com | ||||||
| DNSSEC | ⚠️ Not signed | ||||||
| A | 172.21.85.140UNSPECIFIED160.0.0.0/3 | ||||||
| A | 172.21.109.128UNSPECIFIED160.0.0.0/3 | ||||||
coursehero.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 104.17.142.115Cloudflare104.17.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.17.143.115Cloudflare104.17.128.0/20 , 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.comdns@cloudflare.com serial=2411390689 | ||||||
rank #4874 in the tld
🔒 HSTS Preload (+subdomains)
📈 Tranco rank: #14,988
Same first word
Similar names
DNS History
6 records (1 active, 5 former)
○A104.16.147.2242017-05-23 → 2017-05-23 · 3 obs
● 2017-05-23 06:46:30
○ 2021-10-20 05:29:56
○ 2026-08-13 01:36:44
○ 2021-10-20 05:29:56
○ 2026-08-13 01:36:44
○A104.16.148.2242017-05-23 → 2017-05-23 · 3 obs
● 2017-05-23 06:46:30
○ 2021-10-20 05:29:56
○ 2026-08-13 01:36:44
○ 2021-10-20 05:29:56
○ 2026-08-13 01:36:44
○A104.16.149.2242017-05-23 → 2017-05-23 · 3 obs
● 2017-05-23 06:46:30
○ 2021-10-20 05:29:56
○ 2026-08-13 01:36:44
○ 2021-10-20 05:29:56
○ 2026-08-13 01:36:44
○A104.16.150.2242017-05-23 → 2017-05-23 · 3 obs
● 2017-05-23 06:46:30
○ 2021-10-20 05:29:56
○ 2026-08-13 01:36:44
○ 2021-10-20 05:29:56
○ 2026-08-13 01:36:44
○A104.16.151.2242017-05-23 → 2017-05-23 · 3 obs
● 2017-05-23 06:46:30
○ 2021-10-20 05:29:56
○ 2026-08-13 01:36:44
○ 2021-10-20 05:29:56
○ 2026-08-13 01:36:44
●CNAMEinternal-a2c293152414111eab63b02f84701c5e-82471424.us-east-1.elb.amazonaws.com2021-10-20 → 2026-08-13 · 2 obs
● 2021-10-20 05:29:56
● 2026-08-13 01:36:44
● 2026-08-13 01:36:44
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.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: 743ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| TXT | 1 | google-site-verification=D0zk5vMBD1mf3xs |
| CNAME | 1 | internal-a2c293152414111eab63b02f84701c5 |
📌 Glue Records Collected
Total: 12
Out-of-bailiwick: 12 (bob.ns.cloudflare.com, bob.ns.cloudflare.com, bob.ns.cloudflare.com...)
Analysis
IP Addresses
dev.coursehero.com has two IP addresses: 172.21.85.140 and 172.21.109.128