cybercore.co.jp

Valid Email Server
Domain Lookup › cybercore.co.jp

Domain Overview

DNS: ✓ 19d ago Checker: ✓ 19d ago
cybercore.co.jp
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-05-21 20:45:35 UTC · ↺ Refresh

Add email validation to your forms — free

Add our free script to block 10,000+ disposable domains + perform other checks. No signup, unlimited checks.

MX validation Disposable detection Role accounts
Add to your signup form
<script src="https://check.verifyswift.com/"></script>
One line · No registration · See full docs & demo → · Customize →

MX Hostnames

  • cybercore-co-jp.mail.protection.outlook.com

MX Priorities

  • cybercore-co-jp.mail.protection.outlook.com: 0

A / AAAA Records

  • 133.242.79.68 ↩ cybercore.co.jp
  • 2401:2500:109:104e::4 ↩ cybercore.co.jp

Mail Server IPs

  • 52.101.124.5 ↩ mail-tyvp286cu00305.inbound.protection.outlook.com
  • 52.101.157.10 ↩ mail-os0p286cu01302.inbound.protection.outlook.com
  • 52.101.157.40 ↩ mail-os9p286cu00100.inbound.protection.outlook.com
  • 52.101.124.0 ↩ mail-tycp286cu02600.inbound.protection.outlook.com
  • 2a01:111:f403:cc1f::1 ↩ mail-os0p286cu01201.inbound.protection.outlook.com
  • 2a01:111:f403:cc1a::1 ↩ mail-ty3p286cu00101.inbound.protection.outlook.com
  • 2a01:111:f403:cc1a::2 ↩ mail-tyvp286cu00302.inbound.protection.outlook.com
  • 2a01:111:f403:cc1a::3 ↩ mail-tyvp286cu00203.inbound.protection.outlook.com

SOA Record

Raw SOA ns1.cybercore.co.jp root.cybercore.co.jp 2025071616 28800 7200 604800 86400
Primary NS (mname)
ns1.cybercore.co.jp
Admin Email (rname)
root@cybercore.co.jp
Serial
2025071616
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
86400s

Nameservers (NS)

ns1.cybercore.co.jp
2nd.dnsv.jp

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

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

2 records
  • MS=ms56862279
  • SPFv=spf1 include:spf.protection.outlook.com -all
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 cybercore.co.jp

SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.

No credit card required
Get 1,000 Free Credits