Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
coursera.org
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-30 12:02:59 UTC · ↺ Refresh
MX Hostnames
- alt1.aspmx.l.google.com
- aspmx3.googlemail.com
- aspmx5.googlemail.com
- aspmx.l.google.com
- aspmx4.googlemail.com
- aspmx2.googlemail.com
- alt2.aspmx.l.google.com
MX Priorities
- aspmx4.googlemail.com: 30
- aspmx5.googlemail.com: 30
- aspmx.l.google.com: 10
- alt1.aspmx.l.google.com: 20
- alt2.aspmx.l.google.com: 20
- aspmx2.googlemail.com: 30
- aspmx3.googlemail.com: 30
A / AAAA Records
- 18.164.116.34
- 18.164.116.73
- 18.164.116.5
- 18.164.116.69
Mail Server IPs
- 192.178.223.27 ↩ yulhrs-in-f27.1e100.net
- 2a00:1450:4009:c0f::1a ↩ yulhrs-in-f26.1e100.net
- 173.194.76.26 ↩ ws-in-f26.1e100.net
- 2a00:1450:400c:c00::1a ↩ ws-in-f26.1e100.net
- 142.251.111.27 ↩ bk-in-f27.1e100.net
- 2607:f8b0:4004:c25::1a ↩ yuiadtq-in-f26.1e100.net
- 108.177.123.27 ↩ lcscld-in-f27.1e100.net
- 2800:3f0:4003:c0f::1b (no PTR)
- 172.253.116.27 ↩ dj-in-f27.1e100.net
- 2a00:1450:400b:c02::1a ↩ dj-in-f26.1e100.net
SOA Record
Raw SOA
ns-1590.awsdns-06.co.uk awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-1590.awsdns-06.co.uk
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-258.awsdns-32.com
ns-688.awsdns-22.net
ns-1481.awsdns-57.org
ns-1590.awsdns-06.co.uk
SPF Record
✓ Strict (-all)
v=spf1 include:sendgrid.net ip4:24.6.102.21 ip4:50.16.53.44 include:_spf.google.com include:amazonses.com include:spf.mtasv.net include:_spf.salesforce.com -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=0; pct=100
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 3 found
google._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
39 records- rzp-site-verification=0e1f055c2e81430150efedded50e7992
- cisco-ci-domain-verification=5b418d2526e560d4ec96988886c86e7930c6936b68215183295356a4e4bf36d7
- openai-domain-verification=dv-ykQklEbL6szace8vG1l7ejkQ
- google-site-verification=H2oN7Mv4QCzOClwXz1j30f-4544byEDxyEk0o3eluE0
- cursor-domain-verification-kg2va5=P61NAJ77jH4Kuavd9jaD3I4Bw
- stripe-verification=0f6967e13ea84d76953d1c3f2dc9eb80e82f090fff99161cd2fa957f55a71d60
- google-site-verification=874wxzrE4FAJO81XTCXyH6WYnWZAMdlbMRXI3lfI0bw
- google-site-verification=l-IugqqOHDGlHpUHfv3e6z8J1koLgfGSem04lqBA_B8
- google-site-verification=BbSjFsQN-aTkQDOiar6q3O4fPzSlgepoOdM3fMuCXFA
- miro-verification=d5e807f40d602cde4051496eaaa95234e158ada0
- facebook-domain-verification=46dep9ql4m6it0wahwkhiou7xit57h
- 376174617-10056694
- anthropic-domain-verification-r913z0=qHfIpP1D8b5nWxj2rpstnqRZ1
- jamf-site-verification=AmVhIhwqDzkoVxg_B0K81w
- stripe-verification=34fd6b74183c244d59d572c162e5b77fe6eed5e5205296151f49dda7b68670eb
- google-site-verification=61uiBFuqY-MYJHWt_8qbU00Rsn7Nq_njU5eMUG0NlrY
- BthfBdp8W7Bqmm87eNGy
- paloaltonetworks-site-verification=3d8b8eeec8974a6c2b181f7decddc8a96d9cbdcb8f39e4923c53d477a96f6d37
- atlassian-domain-verification=pwnyCbGEmC6E08lYJGO/SYkQvbjFS+OXy03eVMG75U52Edj0vbZGBjdaorxh+PUE
- docker-verification=6792a290-383f-4d78-9f9b-71f46df7b6b2
- apple-domain-verification=8gxy28dzSlSOYkUI
- google-site-verification=fFsckLsIOub_171zkeWLBQ72SvjwGSPsz209wwTtmX4
- MS=ms91657421
- hubspot-domain-verification=ZTM1ZDk4NGEtNWU5Ny00NDJiLWIwNTQtZTA1NGJhZmU3MzZh
- stripe-verification=95449f6ae01b02ef7f65b59ee2f3ed14bac52c49aaa1519e57b864b70baede3a
- docusign=05d7ee1b-a029-4b94-912a-25bb3c4a2bed
- jamf-site-verification=Q2xELHJlL4PRcETKdUHldQ
- google-site-verification=PDgfi1HUgagq2NZOh86B3PpGnjDyNXdUr9iyWzDjONM
- elevenlabs=iuq-HrTSPpSbgooOeznbfY9bR-awTAYggzjFxD0Q6Rw
- google-site-verification=UGpuPtZLCcMKFmgAeN4q6EbvxJn56A8Jz0sgW3yVKmA
- atlassian-domain-verification=OwoxnU5JeeEeNB3PXqTmPOsZNFUYTd05tar4PX8ZNNjps+mMWto+OyyA/50W5+B1
- SPFv=spf1 include:sendgrid.net ip4:24.6.102.21 ip4:50.16.53.44 include:_spf.google.com include:amazonses.com include:spf.mtasv.net include:_spf.salesforce.com -all
- canva-site-verification=m3eGQL4tz88BqXJO92JRpw
- zoom-domain-verification=6fb6c268-238e-477b-ba40-2f0164695cd7
- google-site-verification=nLfEbuY6OaO0lfas7ywHqpPnOMnobNONSJ0hnbJO9co
- google-site-verification=tbpsWy5oBEvo-Kod36Lqsb3qRK0h_divcCGAeUdVZlk
- onetrust-domain-verification=bc353cda9f49402e8b2ac8a3b3e86286
- yandex-verification: 7472d03e746e191a
- spf2.0/pra include:amazonses.com include:sendgrid.net include:_spf.google.com include:spf.mtasv.net -all
Full email verification for coursera.org
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