opensource-workshop.jp - dns.ninja
opensource-workshop.jp
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=1783066502 | ||||||
Subdomains
Same first word
opensource-workshop.jp |
DNS History
12 records (9 active, 3 former)
●MXalt1.aspmx.l.google.com2026-02-15 → 2026-07-03 · 3 obs
● 2026-02-15 09:30:52
● 2026-07-03 09:11:38
●MXalt2.aspmx.l.google.com2026-02-15 → 2026-07-03 · 3 obs
● 2026-02-15 09:30:52
● 2026-07-03 09:11:38
●MXalt3.aspmx.l.google.com2026-02-15 → 2026-07-03 · 3 obs
● 2026-02-15 09:30:52
● 2026-07-03 09:11:38
●MXalt4.aspmx.l.google.com2026-02-15 → 2026-07-03 · 3 obs
● 2026-02-15 09:30:52
● 2026-07-03 09:11:38
●MXaspmx.l.google.com2026-02-15 → 2026-07-03 · 3 obs
● 2026-02-15 09:30:52
● 2026-07-03 09:11:38
○MXsakura-osws.opensource-workshop.jp2015-06-14 → 2016-09-18 · 4 obs
● 2016-09-18 00:42:54
○ 2026-02-15 09:30:52
○ 2026-07-03 09:11:38
●A163.43.183.2522026-02-15 → 2026-07-03 · 3 obs
● 2026-02-15 09:30:52
● 2026-07-03 09:11:38
○A27.133.129.622016-09-18 → 2016-09-18 · 4 obs
● 2016-09-18 00:42:54
○ 2026-02-15 09:30:52
○ 2026-07-03 09:11:38
○A49.212.144.772015-06-14 → 2016-04-13 · 4 obs
● 2016-04-13 03:16:54
○ 2016-09-18 00:42:54
○ 2026-07-03 09:11:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | d.dns.jp, c.dns.jp, a.dns.jp, b.dns.jp... | - |
| opensource-workshop.jp | ns2.dns.ne.jp, ns1.dns.ne.jp | 2 records |
✅ Authoritative Response
Server:133.167.21.1
NS records: ns2.dns.ne.jp, ns1.dns.ne.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for opensource-workshop.jp (unsigned zone)
⏱️ Timing
Total: 943ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 163.43.183.252 |
| NS | 2 | ns1.dns.ne.jp, ns2.dns.ne.jp |
| MX | 5 | aspmx.l.google.com (pri: 1), alt1.aspmx.l.google.com (pri: 5)... |
| TXT | 2 | v=spf1 mx a:www1146.sakura.ne.jp include, google-site-verification=1cCXDkqNvqZMFpQ |
| 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
edl01.opensource-workshop.jp and edl02.opensource-workshop.jp each fall under opensource-workshop.jp as their parent domain.
IP Addresses
opensource-workshop.jp resolves to just one IP address, 163.43.183.252.
Other host names share IP numbers with opensource-workshop.jp; www.yukiwari-sh.ed.jp is one such example.
Name Servers
Three name servers are authoritative for opensource-workshop.jp: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.
The name servers of opensource-workshop.jp overlap at least partially with those of other domains — among them bi-esu.com, happytogether.sakura.ne.jp, calm-haricom.sakura.ne.jp and two more.
Three hostnames, one IP address apiece: master.dns.ne.jp resolves to 210.224.172.18, ns1.dns.ne.jp resolves to 61.211.236.1 and ns2.dns.ne.jp resolves to 133.167.21.1.
Mail Servers
opensource-workshop.jp has five mail servers, which are aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.
There is at least a partial MX overlap between opensource-workshop.jp and other domains, including ns500698.ns500759.ns500698.ns500758.ns500735.ns500698.ns500735.ns500698.ns500735.ns500708.ns500698.ns500619.ns500619.ns500619.trackreceptor.com, ns500698.ns500759.ns500759.ns500758.ns500735.ns500698.ns500736.ns500736.ns500698.ns500735.ns500735.ns500619.ns500619.trackreceptor.com, totalpsi.com and two others.
These mail servers tend to appear in combination with mail servers alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx2.googlemail.com and 3 others.
Host names that have two IP addresses:
aspmx.l.google.com maps to two IP addresses — 192.178.218.27 and 2607:f8b0:4004:c0b::1b.
alt1.aspmx.l.google.com maps to two IP addresses — 108.177.123.26 and 2800:3f0:4003:c0f::1a.
alt2.aspmx.l.google.com maps to two IP addresses — 172.253.116.27 and 2a00:1450:400b:c02::1a.
alt3.aspmx.l.google.com maps to two IP addresses — 192.178.223.27 and 2a00:1450:4009:c0f::1a.
alt4.aspmx.l.google.com maps to two IP addresses — 172.253.157.27 and 2a00:1450:400c:c23::1b.