Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
fairfaxcounty.gov
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 03:46:37 UTC · ↺ Refresh
MX Hostnames
- fairfaxcounty-gov.mail.protection.outlook.com
MX Priorities
- fairfaxcounty-gov.mail.protection.outlook.com: 5
A / AAAA Records
- 166.94.11.36 ↩ www.fairfaxcounty.gov
Mail Server IPs
- 52.101.11.12 ↩ mail-sa9pr09cu00104.inbound.protection.outlook.com
- 52.101.8.50 ↩ mail-dm6pr09cu00202.inbound.protection.outlook.com
- 52.101.8.52 ↩ mail-ds0pr09cu00104.inbound.protection.outlook.com
- 52.101.9.19 ↩ mail-blapr09cu00103.inbound.protection.outlook.com
- 2a01:111:f403:f900::1 ↩ mail-blapr09cu00101.inbound.protection.outlook.com
- 2a01:111:f403:f904::1 ↩ mail-ds0pr09cu00101.inbound.protection.outlook.com
- 2a01:111:f403:f904:: ↩ mail-dm6pr09cu00200.inbound.protection.outlook.com
- 2a01:111:f403:f90e::1 ↩ mail-sa9pr09cu00101.inbound.protection.outlook.com
SOA Record
Raw SOA
ns31.fairfaxcounty.gov hostmaster.fairfaxcounty.gov 2026031710 14400 1800 604800 300
Primary NS (mname)
ns31.fairfaxcounty.gov
Admin Email (rname)
hostmaster@fairfaxcounty.gov
Serial
2026031710
Refresh
14400s
Retry
1800s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
ns31.fairfaxcounty.gov
ns21.fairfaxcounty.gov
ns11.fairfaxcounty.gov
ns13.fairfaxcounty.gov
SPF Record
✓ Strict (-all)
v=spf1 a:mail.fairfaxcounty.gov include:spf.protection.outlook.com include:%{d}.0d.spf-protect.agari.com exists:%{i}._i.%{d}._d.espf.agari.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=none; fo=1; ri=3600; rua=mailto:[email protected]; ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✓ 5 found
selector1._domainkey
selector2._domainkey
k1._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 392 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
14 records- docusign=7aacd89f-feca-4c4d-a78d-ca68853b7ceb
- google-gws-recovery-domain-verification=38041389
- airtable-verification=dc7f1e6ed900d98d8a0c913ee1e71cd3
- google-site-verification=MoadPrKlNU94WpvpohVrAC5_chyD4jmy-kEZWuGXnKc
- OSIAGENTREGURL=https://mdm.fairfaxcounty.gov:444/athena/enrollment/athenaiOSEnroll.aspx
- Dynatrace-site-verification=f772f294-0837-4ab1-8159-ef2dc1ff8599__1blair5bs40b67achalko2bgff
- cisco-ci-domain-verification=c10e25235087c3313d488e6f05b4ea42a291dc066e1a916b6822df7c643dfe8
- android-mdm-enroll=https://mdm.fairfaxcounty.gov:444/athena/enrollment/athenaandroidenroll.aspx
- SPFv=spf1 a:mail.fairfaxcounty.gov include:spf.protection.outlook.com include:%{d}.0d.spf-protect.agari.com exists:%{i}._i.%{d}._d.espf.agari.com -all
- 1FxGHoUK6ffX/Aa5iRzWoD1NK5D4X1r0I97+P1HAYA9D4pa4NOFf1DKOo4kjSdGL2G1Gc5+wuKfapkJszDX7ag==
- smartsheet-site-validation=d6V2yUm6XoguE2TzGOAKX67nHKAD7uR4
- MS=ms93555380
- nintex.5d03f4fa32d0b40d1fe55809
- apple-domain-verification=vM40oG6fznnFKvnf
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for fairfaxcounty.gov
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits