is-network.jp - robtex.com
is-network.jp
| DNSSEC | ⚠️ Not signed | ||||||
| NS | master.dns.ne.jp ⭐ | ||||||
| A | 210.224.172.18🇯🇵 SAKURA-C210.224.160.0/19 (1/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | master.dns.ne.jp | ||||||
| NS | ns1.dns.ne.jp | ||||||
| A | 61.211.236.1🇯🇵 SAKURA-B61.211.236.0/24 (4/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | ns1.dns.ne.jp | ||||||
| NS | ns2.dns.ne.jp | ||||||
| A | 133.167.21.1🇯🇵 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 | ||||||
| PTR | ns2.dns.ne.jp | ||||||
| MX | mgws241-1.kagoya.net ⭐ | ||||||
| A | 124.248.146.10🇯🇵 KAGOYAJAPAN124.248.144.0/20 KAGOYA Japan Inc. | ||||||
| PTR | mgws241-1.kagoya.net | ||||||
| MX | mgws241-2.kagoya.net(20) | ||||||
| A | 124.248.146.11🇯🇵 KAGOYAJAPAN124.248.144.0/20 KAGOYA Japan Inc. | ||||||
| PTR | mgws241-2.kagoya.net | ||||||
| TXT | v=spf1 +ip4:180.42.87.80/28 +ip4:124.248.146.12/32 +ip4:61.127.121.105/32 +ip... | ||||||
| TXT | google-site-verification=-c9nnLTegJ7cfU5HAjHgtktivMNMIJmk9MF_Ky1Wsc4 | ||||||
| SOA | master.dns.ne.jptech@sakura.ad.jp 2026-07-31 #1 | ||||||
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=1785726003 | ||||||
Subdomains
Same first word
is-network.co.jp |
is-network.jp |
is-network.it |
Similar names
DNS History
7 records (5 active, 2 former)
●NSmaster.dns.ne.jp2026-05-09 → 2026-08-03 · 3 obs
● 2026-05-09 11:53:16
● 2026-08-03 03:19:14
●NSns1.dns.ne.jp2026-05-09 → 2026-08-03 · 3 obs
● 2026-05-09 11:53:16
● 2026-08-03 03:19:14
●NSns2.dns.ne.jp2026-05-09 → 2026-08-03 · 3 obs
● 2026-05-09 11:53:16
● 2026-08-03 03:19:14
○NSns3.is-network.jp2017-11-08 → 2017-11-08 · 3 obs
○ 2026-05-09 11:53:16
○ 2026-08-03 03:19:14
●MXmgws241-1.kagoya.net2026-05-09 → 2026-08-03 · 3 obs
● 2026-05-09 11:53:16
● 2026-08-03 03:19:14
●MXmgws241-2.kagoya.net2026-05-09 → 2026-08-03 · 3 obs
● 2026-05-09 11:53:16
● 2026-08-03 03:19:14
○MXsmtp3.is-network.co.jp2017-11-08 → 2017-11-08 · 3 obs
○ 2026-05-09 11:53:16
○ 2026-08-03 03:19:14
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | b.dns.jp, h.dns.jp, f.dns.jp, c.dns.jp... | - |
| is-network.jp | ns1.dns.ne.jp, ns2.dns.ne.jp | 2 records |
✅ 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 is-network.jp (unsigned zone)
⏱️ Timing
Total: 1663ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | ns1.dns.ne.jp, ns2.dns.ne.jp |
| MX | 2 | mgws241-1.kagoya.net (pri: 10), mgws241-2.kagoya.net (pri: 20) |
| TXT | 2 | v=spf1 +ip4:180.42.87.80/28 +ip4:124.248, google-site-verification=-c9nnLTegJ7cfU5 |
| SOA | 1 | master.dns.ne.jp tech.sakura.ad.jp |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns1.dns.ne.jp, ns2.dns.ne.jp)
Analysis
Hierarchy
ns3.is-network.jp and ns.is-network.jp each fall under is-network.jp as their parent domain.
Name Servers
The authoritative name servers for is-network.jp are master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp — three in total.
is-network.jp has at least partial name server overlap with other domains, such as tossau.net, landscipe.sakura.ne.jp, debks.com and two others.
It is common to find these name servers paired 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
is-network.jp is served by two mail servers, mgws241-1.kagoya.net and mgws241-2.kagoya.net.
is-network.jp has mail servers in common with entprs.biz, horitomi.co.jp, lewsten.com and matohu.com, among others.
The mail servers of is-network.jp are at least partially shared with other domains, including is-network.co.jp.
These mail servers often co-occur with the mail servers smtp.google.com.
mgws241-1.kagoya.net directs to 124.248.146.10 and mgws241-2.kagoya.net directs to 124.248.146.11; each host name points to exactly one IP number.