81plus.co.jp - robtex.com
81plus.co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 49.212.243.77🇯🇵 SAKURA-C49.212.0.0/16 (7/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www3567.sakura.ne.jp | ||||||
| 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 | 81plus.co.jp ⭐ | ||||||
| A | 49.212.243.77🇯🇵 SAKURA-C49.212.0.0/16 (7/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www3567.sakura.ne.jp | ||||||
| TXT | v=spf1 a:www3567.sakura.ne.jp mx ~all | ||||||
| TXT | google-site-verification=dHjTPmFmLc1fDB1_U2dpbLG1qpV_XwO-Sy2CybkNvzw | ||||||
| SOA | master.dns.ne.jptech@sakura.ad.jp 2026-02-16 #1 | ||||||
co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| TXT | co.jp. | ||||||
MX for
81plus.co.jp |
Subdomains
www.81plus.co.jp |
Same first word
Similar names
DNS History
5 records (5 active, 0 former)
●MX81plus.co.jp2018-06-17 → 2026-07-18 · 2 obs
● 2026-07-18 19:33:52
●A49.212.243.772018-06-17 → 2026-07-18 · 2 obs
● 2026-07-18 19:33:52
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | d.dns.jp, e.dns.jp, f.dns.jp, h.dns.jp... | - |
| 81plus.co.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 81plus.co.jp (unsigned zone)
⏱️ Timing
Total: 639ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 49.212.243.77 |
| NS | 2 | ns1.dns.ne.jp, ns2.dns.ne.jp |
| MX | 1 | 81plus.co.jp (pri: 10) |
| TXT | 2 | v=spf1 a:www3567.sakura.ne.jp mx ~all, google-site-verification=dHjTPmFmLc1fDB1 |
| SOA | 1 | master.dns.ne.jp tech.sakura.ad.jp |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns2.dns.ne.jp, ns1.dns.ne.jp)
Analysis
Hierarchy
81plus.co.jp is a parent domain of www.81plus.co.jp.
Mail Server Role
81plus.co.jp serves as a mail server for 81plus.co.jp.
IP Addresses
81plus.co.jp has exactly one IP address — 49.212.243.77.
mail.n-stylehome.com, organo-science.com, muse-tokorozawa.or.jp plus two other host names have IP numbers in common with 81plus.co.jp.
Name Servers
The authoritative name servers for 81plus.co.jp are master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp — three in total.
81plus.co.jp shares at least some of its name servers with other domains, including lum-salon.com, isj-c.com, rikimarumama.sakura.ne.jp and two others.
These name servers are frequently seen alongside 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
81plus.co.jp uses exactly one mail server, which is 81plus.co.jp.
81plus.co.jp directs to just one IP number, 49.212.243.77.