mx2.sel.co.jp - robtex.com

mx2.sel.co.jp

DNSSEC⚠️ Not signed
A210.136.137.84🇯🇵 InfoSphere210.136.0.0/16 INFOSPHERE

sel.co.jp

DNSSEC⚠️ Not signed
NSns.sel.co.jp ⭐
NSns2.sphere.ad.jp
MXmx2.sel.co.jp ⭐
TXTapple-domain-verification=7qL81Ef8hSOzsLZn
TXTMS=5A1D30C4A6E9830FB1B8C1637CAF122FB069E242
TXTZOOM_verify_ws91ogwDC3632Tnw0n1TLN
TXTgoogle-site-verification=lHuCNdBr-27-6HGpYAC1gDqkPKq9fts2EmGUx4aF6G8
TXTv=spf1 ip4:210.136.137.64/27 ~all
SOAns.sel.co.jppostmaster@sel.co.jp 2026-06-04 #1

PTR for

84.sub64.137.136.210.in-addr.arpa

MX for

sel.co.jp

Same first word

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DNS History

1 record (1 active, 0 former)

202120222023202420252026A210.136.137.84
●A210.136.137.842020-02-28 → 2026-07-30 · 2 obs
● 2020-02-28 15:59:02
● 2026-07-30 23:45:46

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
jpa.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...-
sel.co.jpns2.sphere.ad.jp, ns.sel.co.jp3 records

✅ Authoritative Response

Server:202.239.113.26

NS records: ns2.sphere.ad.jp, ns.sel.co.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for sel.co.jp (unsigned zone)

⏱️ Timing

Total: 1021ms | Queries: -

📄 Records

TypeCountSample Data
A1210.136.137.84

📌 Glue Records Collected

Total: 3

In-bailiwick: 1 (ns.sel.co.jp)

Out-of-bailiwick: 2 (ns2.sphere.ad.jp, ns2.sphere.ad.jp)

Analysis

Mail Server Role

Mail for sel.co.jp is routed through the mail server mx2.sel.co.jp.

IP Addresses

mx2.sel.co.jp has exactly one IP address — 210.136.137.84.