Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
ci.irs.gov
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-26 05:12:08 UTC · ↺ Refresh
MX Hostnames
- emge.irs.gov
- emgw.irs.gov
- emgc.irs.gov
MX Priorities
- emge.irs.gov: 10
- emgw.irs.gov: 20
- emgc.irs.gov: 10
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
- 152.216.7.167 ↩ emge.irs.gov
- 2610:30:4000:25::167 ↩ emge.irs.gov
- 152.216.13.169 ↩ emgw.irs.gov
- 2610:30::13:0:0:0:169 ↩ emgw.irs.gov
- 152.216.11.139 ↩ emgc.irs.gov
- 2610:30:2000:25::167 ↩ emgc.irs.gov
SOA Record
Raw SOA
ns1.irs.gov it\.aciouns\.external\.dns\.admin.irs.gov 4982 7200 1800 2419200 900
Primary NS (mname)
ns1.irs.gov
Admin Email (rname)
it\@aciouns\.external\.dns\.admin.irs.gov
Serial
4982
Refresh
7200s
Retry
1800s
Expire
2419200s
Minimum TTL
900s
Nameservers (NS)
ns0161.secondary.cloudflare.com
ns0036.secondary.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:152.216.0.0/20 ip6:2610:30::/32 -all
📊 DNS lookups: 0/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✗ None detectedNo 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
2 records- SPFv=spf1 ip4:152.216.0.0/20 ip6:2610:30::/32 -all
- smartsheet-gov-site-validation=kqMLEuG8u8sFvg-I1M2JKvdEU4gr14Xq
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 ci.irs.gov
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits