next-k.jp - robtex.com
next-k.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2403:3a00:101:23:49:212:243:54🇯🇵 SAKURA-C2403:3a00::/32 SAKURA Internet // OSAKA BACKBONE 1-8-14 Minami-Honmachi, Chuo-ku, Osaka 541-0054, Japan | ||||||
| PTR | www3544.sakura.ne.jp | ||||||
| A | 49.212.243.54🇯🇵 SAKURA-C49.212.0.0/16 (7/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| 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 | next-k.jp ⭐ | ||||||
| A | 2403:3a00:101:23:49:212:243:54🇯🇵 SAKURA-C2403:3a00::/32 SAKURA Internet // OSAKA BACKBONE 1-8-14 Minami-Honmachi, Chuo-ku, Osaka 541-0054, Japan | ||||||
| PTR | www3544.sakura.ne.jp | ||||||
| A | 49.212.243.54🇯🇵 SAKURA-C49.212.0.0/16 (7/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www3544.sakura.ne.jp | ||||||
| TXT | v=spf1 a:www3544.sakura.ne.jp mx ~all | ||||||
| SOA | master.dns.ne.jptech@sakura.ad.jp 2024-06-28 #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=1778734803 | ||||||
MX for
next-k.jp |
Same first word
next-k.jp |
Similar names
DNS History
6 records (6 active, 0 former)
●MXnext-k.jp2017-03-26 → 2026-05-14 · 2 obs
● 2026-05-14 05:14:40
●A2403:3a00:101:23:49:212:243:542017-03-26 → 2026-05-14 · 2 obs
● 2026-05-14 05:14:40
●A49.212.243.542017-03-26 → 2026-05-14 · 2 obs
● 2026-05-14 05:14:40
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | c.dns.jp, h.dns.jp, e.dns.jp, b.dns.jp... | - |
| next-k.jp | ns2.dns.ne.jp, ns1.dns.ne.jp | 2 records |
✅ Authoritative Response
Server:61.211.236.1
NS records: ns2.dns.ne.jp, ns1.dns.ne.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for next-k.jp (unsigned zone)
⏱️ Timing
Total: 434ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 49.212.243.54 |
| AAAA | 1 | 2403:3a00:101:23:49:212:243:54 |
| NS | 2 | ns1.dns.ne.jp, ns2.dns.ne.jp |
| MX | 1 | next-k.jp (pri: 10) |
| TXT | 1 | v=spf1 a:www3544.sakura.ne.jp mx ~all |
| 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
Mail Server Role
next-k.jp serves as the mail server for next-k.jp.
IP Addresses
next-k.jp points to two IP numbers: 2403:3a00:101:23:49:212:243:54 and 49.212.243.54.
Other host names such as forest-networks.com, jdg.co.jp, ur-sumai.co.jp, router.forest-networks.com and ayukitty2.sakura.ne.jp share IPs with next-k.jp.
Name Servers
next-k.jp is delegated to three name servers: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.
next-k.jp at least partially shares name servers with other domains, for instance alc-sasebo.sakura.ne.jp, s-aroma.tokyo, oshimadental.jp, h-rc.jp and yakanhiko.net.
these name servers are often used in conjunction with the name servers dns.sakura.ad.jp.
Host names with a single IP:
master.dns.ne.jp points to: 210.224.172.18.
ns1.dns.ne.jp points to: 61.211.236.1.
ns2.dns.ne.jp points to: 133.167.21.1.
Mail Servers
next-k.jp is handled by a single mail server, next-k.jp.
next-k.jp points to two IPs: 2403:3a00:101:23:49:212:243:54 and 49.212.243.54.