arch.titech.ac.jp - robtex.com

arch.titech.ac.jp

DNSSEC⚠️ Not signed
NSdns-o.net.titech.ac.jp ⭐
A131.112.125.54🇯🇵 TITECH131.112.0.0/16 Tokyo Institute of Technology
NStitechdns-o.noc.titech.ac.jp
A2403:4440:40:997::125:57🇯🇵 TITECH2403:4440::/32 Tokyo Institute of Technology X-Keiro: as9367@noc.titech.ac.jp
A131.112.125.57🇯🇵 TITECH131.112.0.0/16 Tokyo Institute of Technology
NStitechdns-s.noc.titech.ac.jp
A2403:4440:50:947::181:57🇯🇵 TITECH2403:4440::/32 Tokyo Institute of Technology X-Keiro: as9367@noc.titech.ac.jp
A131.112.181.57🇯🇵 TITECH131.112.0.0/16 Tokyo Institute of Technology
MXfilter.nap.gsic.titech.ac.jp ⭐
A131.112.13.7🇯🇵 TITECH131.112.0.0/16 Tokyo Institute of Technology
SOAdns-o.net.titech.ac.jproot@dns-o.net.titech.ac.jp 2026-02-04 #0

titech.ac.jp

DNSSEC⚠️ Not signed
A131.112.125.17🇯🇵 TITECH131.112.0.0/16 Tokyo Institute of Technology
NSns1.noc.titech.ac.jp ⭐
NSns.fujisawa.wide.ad.jp
NStitechns2-o.noc.titech.ac.jp
NStitechns2-s.noc.titech.ac.jp
MXfilter.nap.gsic.titech.ac.jp ⭐
TXTv=spf1 include:_spf.m.titech.ac.jp ~all
TXTgoogle-site-verification=sEA5LrILIEApBN_TmrcwgzYpGxnjq6bV9lluZGkgTJE
SOAns1.noc.titech.ac.jpnoc-admin@noc.titech.ac.jp 2026-07-14 #1
WOT: SAFE (86/100)
rank #6505 globally
rank #120 in the tld
WOT: SAFE (85/100)
📈 Tranco rank: #17,679

Subdomains

okuyama01.arch.titech.ac.jp

Same first word

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arch.edu.pl
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Similar names

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achr.ro
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char.pe.kr
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rhac.org.au
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achr.eu
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char.cn
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rach.in
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char.nl
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rcah.org
hcra.ro
char.ws
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rhca.de

DNS History

7 records (4 active, 3 former)

201820192020202120222023202420252026NSdns-o.net.titech.ac.jptitechdns-o.noc.titech.ac.jptitechdns-s.noc.titech.ac.jpdns-s.net.titech.ac.jplegion.arch.titech.ac.jpns2.noc.titech.ac.jpMXfilter.nap.gsic.titech.ac.jp
●NSdns-o.net.titech.ac.jp2017-03-08 → 2026-07-22 · 2 obs
● 2017-03-08 15:48:48
● 2026-07-22 15:03:56
○NSdns-s.net.titech.ac.jp2017-03-08 → 2017-03-08 · 3 obs
● 2017-03-08 15:48:48
○ 2026-02-16 05:30:32
○ 2026-07-22 15:03:56
○NSlegion.arch.titech.ac.jp2017-03-08 → 2017-03-08 · 3 obs
● 2017-03-08 15:48:48
○ 2026-02-16 05:30:32
○ 2026-07-22 15:03:56
○NSns2.noc.titech.ac.jp2017-03-08 → 2017-03-08 · 3 obs
● 2017-03-08 15:48:48
○ 2026-02-16 05:30:32
○ 2026-07-22 15:03:56
●NStitechdns-o.noc.titech.ac.jp2026-02-16 → 2026-07-22 · 3 obs
○ 2017-03-08 15:48:48
● 2026-02-16 05:30:32
● 2026-07-22 15:03:56
●NStitechdns-s.noc.titech.ac.jp2026-02-16 → 2026-07-22 · 3 obs
○ 2017-03-08 15:48:48
● 2026-02-16 05:30:32
● 2026-07-22 15:03:56
●MXfilter.nap.gsic.titech.ac.jp2017-03-08 → 2026-07-22 · 2 obs
● 2017-03-08 15:48:48
● 2026-07-22 15:03:56

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
jpa.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...-
titech.ac.jptitechns2-s.noc.titech.ac.jp, titechns2-o.noc.titech.ac.jp, ns.fujisawa.wide.ad.jp2 records
arch.titech.ac.jptitechdns-s.noc.titech.ac.jp, titechdns-o.noc.titech.ac.jp4 records

✅ Authoritative Response

Server:131.112.125.57

NS records: titechdns-s.noc.titech.ac.jp, titechdns-o.noc.titech.ac.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for titech.ac.jp (unsigned zone)

⏱️ Timing

Total: 4095ms | Queries: -

📄 Records

TypeCountSample Data
NS2titechdns-s.noc.titech.ac.jp, titechdns-o.noc.titech.ac.jp
MX1filter.nap.gsic.titech.ac.jp (pri: 10)
SOA1dns-o.net.titech.ac.jp root.dns-o.net.ti

📌 Glue Records Collected

Total: 6

In-bailiwick: 2 (titechns2-o.noc.titech.ac.jp, titechns2-s.noc.titech.ac.jp)

Out-of-bailiwick: 4 (titechdns-o.noc.titech.ac.jp, titechdns-s.noc.titech.ac.jp, titechdns-o.noc.titech.ac.jp...)

Analysis

Hierarchy

okuyama01.arch.titech.ac.jp is delegated beneath arch.titech.ac.jp.

Name Servers

arch.titech.ac.jp carries NS records delegating to dns-o.net.titech.ac.jp, titechdns-o.noc.titech.ac.jp and titechdns-s.noc.titech.ac.jp.

There is at least partial name server overlap between arch.titech.ac.jp and other domains — alab.ip.titech.ac.jp, dis.titech.ac.jp, gakumu.titech.ac.jp and two more among them.

These name servers regularly appear alongside dns-o.noc.titech.ac.jp, dns-s.net.titech.ac.jp, ns2.noc.titech.ac.jp and 4 other name servers in NS record sets.

Hosts with two IP numbers each:

titechdns-o.noc.titech.ac.jp resolves to two addresses: 131.112.125.57 and 2403:4440:40:997::125:57.

titechdns-s.noc.titech.ac.jp resolves to two addresses: 131.112.181.57 and 2403:4440:50:947::181:57.

Hosts that resolve to one IP address:

The hostname dns-o.net.titech.ac.jp resolves to 131.112.125.54.

Mail Servers

arch.titech.ac.jp routes its mail through a single mail server, filter.nap.gsic.titech.ac.jp.

arch.titech.ac.jp has the same mail server arrangement as a number of other domains, for example apc.titech.ac.jp, ee.e.titech.ac.jp, enveng.titech.ac.jp and two more.

arch.titech.ac.jp and other domains — isl.titech.ac.jp for instance — share at least some mail servers.

filter.nap.gsic.titech.ac.jp carries a single IP number, which is 131.112.13.7.