cogentco.com

Valid Email Server
Domain Lookup › cogentco.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
cogentco.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-17 22:41:04 UTC · ↺ Refresh

MX Hostnames

  • cogentco-com.mail.protection.outlook.com

MX Priorities

  • cogentco-com.mail.protection.outlook.com: 5

A / AAAA Records

  • 38.100.128.10 ↩ cogentco.com
  • 2001:550:1::cc01 ↩ cogentco.com

Mail Server IPs

  • 52.101.41.28 ↩ mail-sj0pr03cu01504.inbound.protection.outlook.com
  • 52.101.194.4 ↩ mail-ch4pr04cu00104.inbound.protection.outlook.com
  • 52.101.41.0 ↩ mail-byapr05cu00400.inbound.protection.outlook.com
  • 52.101.41.26 ↩ mail-sj0pr03cu01702.inbound.protection.outlook.com
  • 2a01:111:f403:f805::1 ↩ mail-co1pr03cu00301.inbound.protection.outlook.com
  • 2a01:111:f403:c902::6 ↩ mail-sj0pr21cu00106.inbound.protection.outlook.com
  • 2a01:111:f403:c927::1 ↩ mail-bn8pr05cu00301.inbound.protection.outlook.com
  • 2a01:111:f403:c92c::2 ↩ mail-dm2pr04cu00102.inbound.protection.outlook.com

SOA Record

Raw SOA auth1.dns.cogentco.com dns.cogentco.com 2026030909 10800 3600 604800 43200
Primary NS (mname)
auth1.dns.cogentco.com
Admin Email (rname)
dns@cogentco.com
Serial
2026030909
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
43200s

Nameservers (NS)

auth1.dns.cogentco.com
auth2.dns.cogentco.com

SPF Record

✓ Soft Fail (~all)
v=spf1 mx a:engtools.sys.cogentco.com a:mx1.cogentco.com a:mx2.cogentco.com a:mx3.cogentco.com a:mx4.cogentco.com a:mx5.cogentco.com ip6:2001:550:1:304::247 include:cvent-planner.com include:_spf.act-on.net ~all
📊 DNS lookups: 9/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)

DKIM Selectors

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

7 records
  • ZOOM_verify_6LoiHccIcBeiFmEkJmfiR4
  • ifs3oocjo6h5920nr11c1325f9
  • adobe-idp-site-verification=f26b18445e54e1e7da0ebc2c299a9f1c63820cf9ab98c8be839829c2247503cc
  • 2btc923933rlmtmu3eie8bpc65
  • SPFv=spf1 mx a:engtools.sys.cogentco.com a:mx1.cogentco.com a:mx2.cogentco.com a:mx3.cogentco.com a:mx4.cogentco.com a:mx5.cogentco.com ip6:2001:550:1:304::247 include:cvent-planner.com include:_spf.act-on.net ~all
  • cisco-ci-domain-verification=563e6ea9960b89d45e298278ab2c8f2ed5c7bea8277648dd997262491c1f4fd
  • cofnduj090qcu5jbup8c39bovo
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