`mail.smartusb.com.cn`

DNSSEC

⚠️ Not signed

`smartusb.com.cn`

DNSSEC

⚠️ Not signed

Previously MX for

smartusb.com.cn

Same first word

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mail.direct

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mail.sh.cn

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mail.gov.mz

mail.gov.ph

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mail.ee

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mail.ox.rs

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mail.toray

mail.pt

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mail.club

mail.news

mail.daa.jp

mail.sd

mail.co.id

mail.top

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mail.dvrcam.info

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mail.pa

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mail.(0x6c6f6c697461)punk.jp

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DNS History

4 records (0 active, 4 former)

○NSsmartusb.com.cn2017-01-02 → 2017-01-02 · 3 obs

● 2017-01-02 00:40:46
○ 2026-05-14 06:42:10
○ 2026-05-14 06:42:14

○A121.201.37.282017-01-02 → 2017-01-02 · 3 obs

● 2017-01-02 00:40:46
○ 2026-05-14 06:42:10
○ 2026-05-14 06:42:14

○A38.12.179.2142026-05-14 → 2026-05-14 · 2 obs

○ 2026-05-14 06:42:10
○ 2026-05-14 06:42:14

○CNAMEvip01.host-diy.com2017-01-02 → 2017-01-02 · 3 obs

● 2017-01-02 00:40:46
○ 2026-05-14 06:42:10
○ 2026-05-14 06:42:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	e.dns.cn, a.dns.cn, c.dns.cn, d.dns.cn...	-

✅ Authoritative Response

Server:203.119.28.1

NS records: e.dns.cn, a.dns.cn, c.dns.cn, d.dns.cn, b.dns.cn

🔒 DNSSEC Status

❌ Bogus (DNSSEC validation failed)

Validation error at cn: Error: DNS query timeout: 203.119.29.1 for DNSKEY cn

⏱️ Timing

Total: 4247ms | Queries: -

📄 Records

Type	Count	Sample Data

mail.smartusb.com.cn - robtex.com