Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
prtc.us
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-31 06:56:48 UTC · ↺ Refresh
MX Hostnames
- prtc-us.mail.protection.outlook.com
MX Priorities
- prtc-us.mail.protection.outlook.com: 0
A / AAAA Records
- 198.12.93.67 ↩ 198-12-93-67-host.colocrossing.com
Mail Server IPs
- 52.101.41.54 ↩ mail-sj2pr05cu00506.inbound.protection.outlook.com
- 52.101.50.13 ↩ mail-mw2pr02cu00605.inbound.protection.outlook.com
- 52.101.11.9 ↩ mail-sn1pr02cu00101.inbound.protection.outlook.com
- 52.101.50.1 ↩ mail-co1pr05cu00401.inbound.protection.outlook.com
- 2a01:111:f403:c946::6 ↩ mail-ch5pr02cu00406.inbound.protection.outlook.com
- 2a01:111:f403:f913::1 ↩ mail-cy5pr05cu00101.inbound.protection.outlook.com
- 2a01:111:f403:c901::1 ↩ mail-bl2pr04cu00201.inbound.protection.outlook.com
- 2a01:111:f403:f90a::1 ↩ mail-bn8pr03cu00201.inbound.protection.outlook.com
SOA Record
Raw SOA
ns20.digicertdns.com dns.digicertdns.com 2009012188 43200 3600 1209600 180
Primary NS (mname)
ns20.digicertdns.com
Admin Email (rname)
dns@digicertdns.com
Serial
2009012188
Refresh
43200s
Retry
3600s
Expire
1209600s
Minimum TTL
180s
Nameservers (NS)
ns11.dnsmadeeasy.com
ns12.dnsmadeeasy.com
ns13.dnsmadeeasy.com
ns14.dnsmadeeasy.com
ns15.dnsmadeeasy.com
ns10.dnsmadeeasy.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:amazonses.com include:btmailer.com include:_spf.salesforce.com ip4:12.31.127.87/32 ip4:64.53.59.0/24 -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1:d:s
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
12 records- 806gdbppqph6vu63pi4vnk1rtd
- duo_sso_verification=gh5PMVVSpcBdlgfrZ3h0hF730SAJehwxqOjMVEGshxYk34Dw76psSvX47oMccasu
- HJI15AFR2G47EO1AS65SFA9H49
- dh5b5bbgorg211i2j54t5q0vb
- knowbe4-site-verification=ed5131c8a4f566274a1e72977393458a
- bw=Z0F1V2HdJCzATiqM3BqO9fejrcdBxsPPDGDOywdoVKrj
- apple-domain-verification=i5rCF3GZonR3rXfH
- atlassian-sending-domain-verification=98bd3f91-7576-44b9-aab1-41239769c26f
- J29F6VUxwUwg8uyofubYeI0G+baA0RXHkIxH3tXFc0wXJltER6c4JjqXl2djfTlq+iuolgG0L0zNCh7rs6O4zA==
- atlassian-domain-verification=c5xsXdPA44rrQKyq8dh2ELsvNYFHbcgCg4G4614E8Dacg9aUtfl5saGLv22itjzD
- SPFv=spf1 include:spf.protection.outlook.com include:amazonses.com include:btmailer.com include:_spf.salesforce.com ip4:12.31.127.87/32 ip4:64.53.59.0/24 -all
- MS=ms75906021
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