Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
oltc.co
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-04-01 05:47:12 UTC · ↺ Refresh
MX Hostnames
- alt2.aspmx.l.google.com
- aspmx2.googlemail.com
- aspmx.l.google.com
- alt1.aspmx.l.google.com
MX Priorities
- aspmx2.googlemail.com: 30
- alt1.aspmx.l.google.com: 20
- aspmx.l.google.com: 10
- alt2.aspmx.l.google.com: 20
A / AAAA Records
- 74.208.236.39 ↩ 74-208-236-39.elastic-ssl.ui-r.com
- 2607:f1c0:100f:f000::2b6 ↩ 2607-f1c0-100f-f000-0000-0000-0000-02b6.elastic-ssl.ui-r.com
Mail Server IPs
- 108.177.123.27 ↩ lcscld-in-f27.1e100.net
- 2800:3f0:4003:c0f::1a (no PTR)
- 142.251.111.26 ↩ bk-in-f26.1e100.net
- 2607:f8b0:4004:c08::1b ↩ bi-in-f27.1e100.net
- 172.253.116.26 ↩ dj-in-f26.1e100.net
- 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net
SOA Record
Raw SOA
ns1100.ui-dns.org hostmaster.1and1.com 2018040210 28800 7200 604800 300
Primary NS (mname)
ns1100.ui-dns.org
Admin Email (rname)
hostmaster@1and1.com
Serial
2018040210
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
ns1103.ui-dns.de
ns1100.ui-dns.org
ns1027.ui-dns.biz
ns1055.ui-dns.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf-us.ionos.com ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✓ 1 found
k1._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: k1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- MS=C63ECE6CB314850DD73C651F602BE12C9CAEC64D
- SPFv=spf1 include:_spf-us.ionos.com ~all
Full email verification for oltc.co
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits