mail.cert.dev - dns.ninja

mail.cert.dev

DNSSEC⚠️ Not signed
A2a03:6f00:a::1:4004🇷🇺 TimeWeb-AS2a03:6f00:a::/48
PTRmail.cert.dev
A81.19.135.20🇷🇺 TimeWeb-AS81.19.135.0/24
TXTv=spf1 a -all

cert.dev

DNSSEC🔒 Signed (DS record present)
A144.31.220.226🇺🇸 ENETWORKS128.0.0.0/2
NSdean.ns.cloudflare.com ⭐
NSsimone.ns.cloudflare.com
MXmail.cert.dev ⭐
TXTv=spf1 mx -all
SOAdean.ns.cloudflare.comdns@cloudflare.com serial=2406134929
📈 Tranco rank: #343,285

PTR for

20.135.19.81.in-addr.arpa
4.0.0.4.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.a.0.0.0.0.0.f.6.3.0.a.2.ip6.arpa

MX for

cert.dev

Same first word

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mail.dyn-vpn.de

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mail.select

DNS History

2 records (2 active, 0 former)

A2a03:6f00:a::1:400481.19.135.20
●A2a03:6f00:a::1:40042026-03-24 → 2026-06-06 · 2 obs
● 2026-03-24 21:53:40
● 2026-06-06 02:58:54
●A81.19.135.202026-03-24 → 2026-06-06 · 2 obs
● 2026-03-24 21:53:40
● 2026-06-06 02:58:54

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
devns-tld5.charlestonroadregistry.com, ns-tld1.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com...-
cert.devsimone.ns.cloudflare.com, dean.ns.cloudflare.com-

✅ Authoritative Response

Server:162.159.38.26

NS records: simone.ns.cloudflare.com, dean.ns.cloudflare.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 447ms | Queries: -

📄 Records

TypeCountSample Data
A181.19.135.20
AAAA12a03:6f00:a::1:4004
TXT1v=spf1 a -all

Analysis

Mail Server Role

mail.cert.dev is used as a mail server for cert.dev.

IP Addresses

mail.cert.dev points to two IP numbers: 81.19.135.20 and 2a03:6f00:a::1:4004.