Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
isoc.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-30 18:56:34 UTC · ↺ Refresh
MX Hostnames
- mxe86f.netcup.net
- mail.isoc.de
MX Priorities
- mail.isoc.de: 10
- mxe86f.netcup.net: 50
A / AAAA Records
- 202.61.232.109 ↩ ae86d.netcup.net
- 2a03:4000:61:1433::17:2048 (no PTR)
Mail Server IPs
- 202.61.232.111 ↩ mxe86f.netcup.net
- 2a03:4000::523:14fe:afff:fed9:8e3f ↩ mxe86f.netcup.net
SOA Record
Raw SOA
root-dns.netcup.net dnsadmin.netcup.net 2025112524 28800 7200 1209600 86400
Primary NS (mname)
root-dns.netcup.net
Admin Email (rname)
dnsadmin@netcup.net
Serial
2025112524
Refresh
28800s
Retry
7200s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
second-dns.netcup.net
third-dns.netcup.net
root-dns.netcup.net
SPF Record
✓ Soft Fail (~all)
v=spf1 mx a include:_spf.webhosting.systems ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate 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- The German Chapter of the Internet Society
- SPFv=spf1 mx a include:_spf.webhosting.systems ~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 isoc.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits