sharedmail.jp - dns.ninja
sharedmail.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 203.183.107.147🇯🇵 IDC203.183.0.0/17 Frontier Inc. | ||||||
| NS | ns1.dns-server.jp ⭐ | ||||||
| A | 210.239.65.38🇯🇵 IDC210.239.64.0/21 Frontier Inc. | ||||||
| PTR | ns1.dns-server.jp | ||||||
| NS | ns2.dns-server.jp | ||||||
| A | 18.177.45.193🇯🇵 Amazon18.176.0.0/15 EC2 NRT prefix | ||||||
| PTR | ec2-18-177-45-193.ap-northeast-1.compute.amazonaws.com | ||||||
| NS | ns3.dns-server.jp | ||||||
| A | 210.152.8.223🇯🇵 IDC210.152.0.0/20 Frontier Inc. | ||||||
| PTR | ns3.dns-server.jp | ||||||
| NS | ns4.dns-server.jp | ||||||
| A | 15.168.90.255🇯🇵 Amazon15.168.0.0/16 EC2 KIX Prefix | ||||||
| PTR | ec2-15-168-90-255.ap-northeast-3.compute.amazonaws.com | ||||||
| MX | filter1.mail.sharedmail.jp ⭐ | ||||||
| A | 210.239.64.224🇯🇵 IDC210.239.64.0/21 Frontier Inc. | ||||||
| PTR | filter11.mail.sharedmail.jp | ||||||
| MX | filter2.mail.sharedmail.jp ⭐ | ||||||
| A | 210.236.248.40🇯🇵 IDC210.236.240.0/20 Frontier Inc. | ||||||
| PTR | filter13.mail.sharedmail.jp | ||||||
| TXT | v=spf1 include:_spf.sharedmail.jp ~all | ||||||
| TXT | google-site-verification=aONVzefSpXYgzg10puLttHuNpxn1JFPMUsELFafTMZY | ||||||
| SOA | ns1.dns-server.jpdomain@seeds.ne.jp 2026-05-13 #3 | ||||||
jp
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | z.dns.jp ⭐ | ||||||
| NS | a.dns.jp | ||||||
| NS | b.dns.jp | ||||||
| NS | c.dns.jp | ||||||
| NS | d.dns.jp | ||||||
| NS | e.dns.jp | ||||||
| NS | f.dns.jp | ||||||
| NS | g.dns.jp | ||||||
| NS | h.dns.jp | ||||||
| SOA | z.dns.jproot@dns.jp serial=1785347103 | ||||||
Subdomains
a.sharedmail.jp |
mail.sharedmail.jp |
smtp.sharedmail.jp |
mail203.sharedmail.jp |
mx2.sharedmail.jp |
mail201.sharedmail.jp |
mail-tls1.sharedmail.jp |
www.sharedmail.jp |
mx1.sharedmail.jp |
Same first word
Similar names
DNS History
8 records (7 active, 1 former)
●NSns1.dns-server.jp2017-03-28 → 2026-07-29 · 2 obs
● 2026-07-29 18:12:42
●NSns2.dns-server.jp2017-03-28 → 2026-07-29 · 2 obs
● 2026-07-29 18:12:42
●NSns3.dns-server.jp2017-03-28 → 2026-07-29 · 2 obs
● 2026-07-29 18:12:42
●NSns4.dns-server.jp2017-03-28 → 2026-07-29 · 2 obs
● 2026-07-29 18:12:42
●MXfilter1.mail.sharedmail.jp2026-05-10 → 2026-07-29 · 2 obs
● 2026-07-29 18:12:42
●MXfilter2.mail.sharedmail.jp2026-05-10 → 2026-07-29 · 2 obs
● 2026-07-29 18:12:42
○A202.218.248.1702017-03-28 → 2017-03-28 · 3 obs
○ 2026-02-24 17:23:22
○ 2026-07-29 18:12:42
●A203.183.107.1472026-02-24 → 2026-07-29 · 3 obs
● 2026-02-24 17:23:22
● 2026-07-29 18:12:42
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| sharedmail.jp | ns3.dns-server.jp, ns1.dns-server.jp, ns2.dns-server.jp, ns4.dns-server.jp | 4 records |
✅ Authoritative Response
Server:210.152.8.223
NS records: ns3.dns-server.jp, ns1.dns-server.jp, ns2.dns-server.jp, ns4.dns-server.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for sharedmail.jp (unsigned zone)
⏱️ Timing
Total: 929ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 203.183.107.147 |
| NS | 4 | ns3.dns-server.jp, ns4.dns-server.jp... |
| MX | 2 | filter2.mail.sharedmail.jp (pri: 10), filter1.mail.sharedmail.jp (pri: 10) |
| TXT | 2 | v=spf1 include:_spf.sharedmail.jp ~all, google-site-verification=aONVzefSpXYgzg1 |
| SOA | 1 | ns1.dns-server.jp domain.seeds.ne.jp |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns4.dns-server.jp, ns3.dns-server.jp, ns2.dns-server.jp...)
Analysis
Hierarchy
sharedmail.jp is the parent domain of a.sharedmail.jp, mail.sharedmail.jp, smtp.sharedmail.jp, mail203.sharedmail.jp, mx2.sharedmail.jp and a few other host names.
IP Addresses
sharedmail.jp resolves to just one IP address, 203.183.107.147.
Other host names, such as www.sharedmail.jp, share IP numbers with sharedmail.jp.
Name Servers
The NS records for sharedmail.jp point to four name servers: ns1.dns-server.jp, ns2.dns-server.jp, ns3.dns-server.jp and ns4.dns-server.jp.
sharedmail.jp shares at least some of its name servers with other domains, including video-tech.co.jp, wan55.co.jp, taku-acuclinic.com and two others.
The hosts ns1.dns-server.jp, ns2.dns-server.jp, ns3.dns-server.jp and ns4.dns-server.jp all resolve to exactly one IP address each: 210.239.65.38, 18.177.45.193, 210.152.8.223 and 15.168.90.255 respectively.
Mail Servers
sharedmail.jp is served by two mail servers, filter1.mail.sharedmail.jp and filter2.mail.sharedmail.jp.
Mail server setup for sharedmail.jp matches that of other domains, among them creaf.co.jp.
There is at least a partial MX overlap between sharedmail.jp and other domains, including hri-usa.com, castella.co.jp, nsc-kk.co.jp and two others.
These mail servers often co-occur with the mail servers mx1.sharedmail.jp.
filter1.mail.sharedmail.jp and filter2.mail.sharedmail.jp each resolve to one IP number: filter1.mail.sharedmail.jp points to 210.239.64.224 and filter2.mail.sharedmail.jp points to 210.236.248.40.