yknet.ed.jp - robtex.com
yknet.ed.jp
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns5.yknet.ed.jp ⭐ | ||||||
| A | 153.246.20.197🇯🇵 OCN153.240.0.0/13 (AS4713) CIDR BLOCK 98 NTT Communications Corporation 1-1-6 Uchisaiwai-cho, Chiyoda-ku Tokyo 100-8019 JAPAN | ||||||
| NS | ns6.yknet.ed.jp | ||||||
| A | 153.246.20.198🇯🇵 OCN153.240.0.0/13 (AS4713) CIDR BLOCK 98 NTT Communications Corporation 1-1-6 Uchisaiwai-cho, Chiyoda-ku Tokyo 100-8019 JAPAN | ||||||
| MX | mx1.hc1483-23.ap.iphmx.com ⭐ | ||||||
| A | 139.138.42.124🇺🇸 CISCOHPS-APAC139.138.42.0/24 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| A | 139.138.43.179🇺🇸 CISCOHPS-APAC139.138.43.0/24 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| MX | mx2.hc1483-23.ap.iphmx.com(20) | ||||||
| A | 139.138.42.124🇺🇸 CISCOHPS-APAC139.138.42.0/24 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| A | 139.138.43.179🇺🇸 CISCOHPS-APAC139.138.43.0/24 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| TXT | v=spf1 exists:%{i}.spf.hc1483-23.ap.iphmx.com -all | ||||||
| TXT | MS=ms35411520 | ||||||
| SOA | ns5.yknet.ed.jppostmaster@yknet.ed.jp 2025-08-13 #2 | ||||||
ed.jp
| DNSSEC | ⚠️ Not signed | ||||||
| TXT | ed.jp. | ||||||
WOT: SAFE (74/100)
Previously NS for
yknet.ed.jp |
Subdomains
Same first word
Similar names
DNS History
8 records (4 active, 4 former)
●NSns5.yknet.ed.jp2015-08-05 → 2026-05-12 · 2 obs
● 2026-05-12 15:40:02
●NSns6.yknet.ed.jp2015-08-05 → 2026-05-12 · 2 obs
● 2026-05-12 15:40:02
○NSyknet.ed.jp2015-08-05 → 2018-01-16 · 4 obs
● 2018-01-16 01:35:16
○ 2026-03-26 09:09:48
○ 2026-05-12 15:40:02
●MXmx1.hc1483-23.ap.iphmx.com2026-03-26 → 2026-05-12 · 3 obs
● 2026-03-26 09:09:48
● 2026-05-12 15:40:02
●MXmx2.hc1483-23.ap.iphmx.com2026-03-26 → 2026-05-12 · 3 obs
● 2026-03-26 09:09:48
● 2026-05-12 15:40:02
○MXns5.yknet.ed.jp2015-08-05 → 2018-01-16 · 4 obs
● 2018-01-16 01:35:16
○ 2026-03-26 09:09:48
○ 2026-05-12 15:40:02
○MXns6.yknet.ed.jp2015-08-05 → 2018-01-16 · 4 obs
● 2018-01-16 01:35:16
○ 2026-03-26 09:09:48
○ 2026-05-12 15:40:02
○MXns7.yknet.ed.jp2015-08-05 → 2018-01-16 · 4 obs
● 2018-01-16 01:35:16
○ 2026-03-26 09:09:48
○ 2026-05-12 15:40:02
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| yknet.ed.jp | ns6.yknet.ed.jp, ns5.yknet.ed.jp | 2 records |
✅ Authoritative Response
Server:153.246.20.198
NS records: ns6.yknet.ed.jp, ns5.yknet.ed.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for yknet.ed.jp (unsigned zone)
⏱️ Timing
Total: 737ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | ns6.yknet.ed.jp, ns5.yknet.ed.jp |
| MX | 2 | mx1.hc1483-23.ap.iphmx.com (pri: 10), mx2.hc1483-23.ap.iphmx.com (pri: 20) |
| TXT | 2 | v=spf1 exists:%{i}.spf.hc1483-23.ap.iphm, MS=ms35411520 |
| SOA | 1 | ns5.yknet.ed.jp postmaster.yknet.ed.jp |
📌 Glue Records Collected
Total: 2
In-bailiwick: 2 (ns5.yknet.ed.jp, ns6.yknet.ed.jp)
Analysis
Hierarchy
yknet.ed.jp is a parent of ns6.yknet.ed.jp, ns7.yknet.ed.jp and ns5.yknet.ed.jp.
Name Servers
yknet.ed.jp's delegation uses two name servers: ns5.yknet.ed.jp and ns6.yknet.ed.jp.
Host names with a single IP address: ns5.yknet.ed.jp points to 153.246.20.197; ns6.yknet.ed.jp points to 153.246.20.198.
Mail Servers
yknet.ed.jp is served by two mail servers mx1.hc1483-23.ap.iphmx.com and mx2.hc1483-23.ap.iphmx.com.
yknet.ed.jp shares the same mail server setup as other domains, for example edu.city.yokosuka.kanagawa.jp.
Host names with two IP numbers
mx1.hc1483-23.ap.iphmx.com points to 139.138.42.124 and 139.138.43.179.
mx2.hc1483-23.ap.iphmx.com points to 139.138.42.124 and 139.138.43.179.
Names pointing to 139.138.42.124: mx1.hc1483-23.ap.iphmx.com and mx2.hc1483-23.ap.iphmx.com.
Names pointing to 139.138.43.179: mx1.hc1483-23.ap.iphmx.com and mx2.hc1483-23.ap.iphmx.com.