s-letter.com - robtex.com

s-letter.com

DNSSEC⚠️ Not signed
A182.48.49.70🇯🇵 SAKURA-C182.48.0.0/18 (6/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
NSmaster.dns.ne.jp ⭐
A210.224.172.18🇯🇵 SAKURA-C210.224.160.0/19 (1/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
PTRmaster.dns.ne.jp
NSns1.dns.ne.jp
A61.211.236.1🇯🇵 SAKURA-B61.211.236.0/24 (4/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
PTRns1.dns.ne.jp
NSns2.dns.ne.jp
A133.167.21.1🇯🇵 SAKURA-C133.167.21.0/24 (OSAKA) SAKURA Internet // WEST JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka, Osaka 530-0011, Japan
PTRns2.dns.ne.jp
MXs-letter.com ⭐
A182.48.49.70🇯🇵 SAKURA-C182.48.0.0/18 (6/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
TXTv=spf1 a:www2160.sakura.ne.jp mx ~all
SOAmaster.dns.ne.jptech@sakura.ad.jp 2025-03-05 #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=1782836966
WOT: SAFE (62/100)

MX for

s-letter.com

Same first word

s-letter.com

Similar names

ter-elst.nl
rest-let.com
tel-ster.pl
tel-ster.com.pl

DNS History

10 records (5 active, 5 former)

200920112013201520172019202120232025NSmaster.dns.ne.jpns1.dns.ne.jpns2.dns.ne.jpdns.i-board.comdns2.i-board.comns1.value-domain.comns2.value-domain.comMXs-letter.commx.s-letter.comA182.48.49.70
○NSdns.i-board.com2008-03-04 → 2008-03-04 · 3 obs
● 2008-03-04 21:29:16
○ 2015-05-15 21:32:50
○ 2026-06-30 16:45:28
○NSdns2.i-board.com2008-03-04 → 2008-03-04 · 3 obs
● 2008-03-04 21:29:16
○ 2015-05-15 21:32:50
○ 2026-06-30 16:45:28
●NSmaster.dns.ne.jp2026-02-19 → 2026-06-30 · 3 obs
○ 2016-12-04 19:45:26
● 2026-02-19 15:25:52
● 2026-06-30 16:45:28
●NSns1.dns.ne.jp2026-02-19 → 2026-06-30 · 3 obs
○ 2016-12-04 19:45:26
● 2026-02-19 15:25:52
● 2026-06-30 16:45:28
○NSns1.value-domain.com2015-05-15 → 2016-12-04 · 5 obs
○ 2008-03-04 21:29:16
● 2015-05-15 21:32:50
● 2016-12-04 19:45:26
○ 2026-02-19 15:25:52
○ 2026-06-30 16:45:28
●NSns2.dns.ne.jp2026-02-19 → 2026-06-30 · 3 obs
○ 2016-12-04 19:45:26
● 2026-02-19 15:25:52
● 2026-06-30 16:45:28
○NSns2.value-domain.com2015-05-15 → 2016-12-04 · 5 obs
○ 2008-03-04 21:29:16
● 2015-05-15 21:32:50
● 2016-12-04 19:45:26
○ 2026-02-19 15:25:52
○ 2026-06-30 16:45:28
○MXmx.s-letter.com2008-03-04 → 2008-03-04 · 3 obs
● 2008-03-04 21:29:16
○ 2015-05-15 21:32:50
○ 2026-06-30 16:45:28
●MXs-letter.com2026-02-19 → 2026-06-30 · 3 obs
○ 2015-05-15 21:32:50
● 2026-02-19 15:25:52
● 2026-06-30 16:45:28
●A182.48.49.702026-02-19 → 2026-06-30 · 2 obs
● 2026-02-19 15:25:52
● 2026-06-30 16:45:28

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
s-letter.comns1.dns.ne.jp, ns2.dns.ne.jp-

✅ Authoritative Response

Server:133.167.21.1

NS records: ns1.dns.ne.jp, ns2.dns.ne.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for s-letter.com (unsigned zone)

⏱️ Timing

Total: 1225ms | Queries: -

📄 Records

TypeCountSample Data
A1182.48.49.70
NS2ns1.dns.ne.jp, ns2.dns.ne.jp
MX1s-letter.com (pri: 10)
TXT1v=spf1 a:www2160.sakura.ne.jp mx ~all
SOA1master.dns.ne.jp tech.sakura.ad.jp

Analysis

Mail Server Role

s-letter.com serves as a mail server for s-letter.com.

IP Addresses

s-letter.com has exactly one IP address — 182.48.49.70.

maie.jp, murayama-zouenco.sakura.ne.jp, mail.onsensui.info plus two other host names have IP numbers in common with s-letter.com.

Name Servers

The authoritative name servers for s-letter.com are master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp — three in total.

There is at least partial name server overlap between s-letter.com and other domains — wo-corp.co.jp, 72.16.160.in-addr.arpa, holys.jp and two more among them.

These name servers are routinely deployed together with the name servers dns.sakura.ad.jp.

The hostnames master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp each resolve to a single IP: master.dns.ne.jp → 210.224.172.18, ns1.dns.ne.jp → 61.211.236.1, ns2.dns.ne.jp → 133.167.21.1.

Mail Servers

s-letter.com uses exactly one mail server, which is s-letter.com.

s-letter.com directs to just one IP number, 182.48.49.70.