Live data — DNS records and disposable check were just fetched and saved.
Domain Overview
DNS: ⚡ live
Checker: ⚡ live
ctb.ne.jp
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-05-21 08:36:04 UTC · ↺ Refresh
MX Hostnames
- aspmx.ctb.ne.jp
MX Priorities
- aspmx.ctb.ne.jp: 10
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
- 202.214.233.73 ↩ ogo073.orion-as.jp
SOA Record
Raw SOA
ctb.ne.jp root.ctb.ne.jp 1 3600 3600 604800 86400
Primary NS (mname)
ctb.ne.jp
Admin Email (rname)
root@ctb.ne.jp
Serial
1
Refresh
3600s
Retry
3600s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
dns11.ctb.ne.jp
dns12.ctb.ne.jp
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:211.15.112.64/26 ip4:211.15.117.0/26 ip4:202.214.233.0/24 ~all
📊 DNS lookups: 0/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; adkim=s; aspf=s; rua=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected]
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 ip4:211.15.112.64/26 ip4:211.15.117.0/26 ip4:202.214.233.0/24 ~all
- MS=F98EA4969C23DEE9CD629CFD096DBEE4A2651874
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 · Customize →
See demo & docs
Deep verification
Full email verification for ctb.ne.jp
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits