lets-think.com - dns.ninja

lets-think.com

DNSSEC⚠️ Not signed
A121.83.250.15🇯🇵 eo121.80.0.0/14 K-OPTI.COM
PTRv0015.cyclops.co.jp
NSns1.oftech.co.jp ⭐
A121.83.250.201🇯🇵 eo121.80.0.0/14 K-OPTI.COM
PTRns1.oftech.co.jp
NSns2.oftech.co.jp
A121.83.250.202🇯🇵 eo121.80.0.0/14 K-OPTI.COM
PTRns2.oftech.co.jp
MXmail.lets-think.com ⭐
A121.83.250.15🇯🇵 eo121.80.0.0/14 K-OPTI.COM
PTRv0015.cyclops.co.jp
TXTv=spf1 +ip4:121.83.250.0/23 ~all
SOAns1.oftech.co.jpsupport@oftech.co.jp 2023-05-09 #1

com

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1786470874

Subdomains

mail.lets-think.com

Same first word

lets-think.com

DNS History

9 records (4 active, 5 former)

20162017201820192020202120222023202420252026NSns1.oftech.co.jpns2.oftech.co.jpmaster.dns.ne.jpns1.dns.ne.jpns2.dns.ne.jpMXmail.lets-think.comlets-think.comA121.83.250.15182.48.0.202
○NSmaster.dns.ne.jp2015-08-19 → 2016-07-03 · 4 obs
● 2015-08-19 17:31:44
● 2016-07-03 13:37:36
○ 2017-03-26 22:54:06
○ 2026-08-11 17:58:32
○NSns1.dns.ne.jp2015-08-19 → 2016-07-03 · 4 obs
● 2015-08-19 17:31:44
● 2016-07-03 13:37:36
○ 2017-03-26 22:54:06
○ 2026-08-11 17:58:32
●NSns1.oftech.co.jp2017-03-26 → 2026-08-11 · 3 obs
○ 2016-07-03 13:37:36
● 2017-03-26 22:54:06
● 2026-08-11 17:58:32
○NSns2.dns.ne.jp2015-08-19 → 2016-07-03 · 4 obs
● 2015-08-19 17:31:44
● 2016-07-03 13:37:36
○ 2017-03-26 22:54:06
○ 2026-08-11 17:58:32
●NSns2.oftech.co.jp2017-03-26 → 2026-08-11 · 3 obs
○ 2016-07-03 13:37:36
● 2017-03-26 22:54:06
● 2026-08-11 17:58:32
○MXlets-think.com2015-08-19 → 2016-07-03 · 4 obs
● 2015-08-19 17:31:44
● 2016-07-03 13:37:36
○ 2017-03-26 22:54:06
○ 2026-08-11 17:58:32
●MXmail.lets-think.com2017-03-26 → 2026-08-11 · 3 obs
○ 2016-07-03 13:37:36
● 2017-03-26 22:54:06
● 2026-08-11 17:58:32
●A121.83.250.152017-03-26 → 2026-08-11 · 3 obs
○ 2016-07-03 13:37:36
● 2017-03-26 22:54:06
● 2026-08-11 17:58:32
○A182.48.0.2022015-08-19 → 2016-07-03 · 4 obs
● 2015-08-19 17:31:44
● 2016-07-03 13:37:36
○ 2017-03-26 22:54:06
○ 2026-08-11 17:58:32

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
lets-think.comns1.oftech.co.jp, ns2.oftech.co.jp-

✅ Authoritative Response

Server:121.83.250.201

NS records: ns1.oftech.co.jp, ns2.oftech.co.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for lets-think.com (unsigned zone)

⏱️ Timing

Total: 904ms | Queries: -

📄 Records

TypeCountSample Data
A1121.83.250.15
NS2ns2.oftech.co.jp, ns1.oftech.co.jp
MX1mail.lets-think.com (pri: 10)
TXT1v=spf1 +ip4:121.83.250.0/23 ~all
SOA1ns1.oftech.co.jp support.oftech.co.jp

Analysis

Hierarchy

The domain mail.lets-think.com falls under the parent lets-think.com.

IP Addresses

lets-think.com resolves to one IP address: 121.83.250.15.

lets-think.com shares its IP numbers with other host names, including mail.chernobyldatabase.com, chernobyldatabase.com, v0015.cyclops.co.jp and mail.lets-think.com.

Name Servers

The NS records for lets-think.com delegate to ns1.oftech.co.jp and ns2.oftech.co.jp.

lets-think.com uses the same name servers as several other domains — among them amust-net.com, testup.jp, joeforest.net and two more.

At least some of lets-think.com's name servers are shared with other domains, for example livedo.jp, oftech.co.jp, ym-k.co.jp and two more.

Each of ns1.oftech.co.jp and ns2.oftech.co.jp has one IP address: ns1.oftech.co.jp uses 121.83.250.201 and ns2.oftech.co.jp uses 121.83.250.202.

Mail Servers

Mail for lets-think.com is handled by a single mail server, mail.lets-think.com.

mail.lets-think.com resolves to 121.83.250.15 and no other IP number.