403k.net - robtex.com
403k.net
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2001:e42:101:2:202:181:99:21🇯🇵 SAKURA-B2001:e40::/30 SAKURA Internet Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka 530-0011, JAPAN | ||||||
| PTR | www301.sakura.ne.jp | ||||||
| A | 202.181.99.21🇯🇵 SAKURA-B202.181.96.0/20 (6/TOKYO) SAKURA Internet // EAST 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 | 403k.net ⭐ | ||||||
| A | 2001:e42:101:2:202:181:99:21🇯🇵 SAKURA-B2001:e40::/30 SAKURA Internet Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka 530-0011, JAPAN | ||||||
| PTR | www301.sakura.ne.jp | ||||||
| A | 202.181.99.21🇯🇵 SAKURA-B202.181.96.0/20 (6/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www301.sakura.ne.jp | ||||||
| TXT | v=spf1 a:www301.sakura.ne.jp mx ~all | ||||||
| SOA | master.dns.ne.jptech@sakura.ad.jp 2025-12-08 #2 | ||||||
net
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1777007731 | ||||||
MX for
403k.net |
Same first word
403k.net |
Similar names
DNS History
10 records (6 active, 4 former)
●NSmaster.dns.ne.jp2026-04-03 → 2026-04-24 · 3 obs
● 2026-04-03 23:35:08
● 2026-04-24 05:32:46
○NSns01.yahoodomains.jp2015-06-17 → 2017-08-21 · 7 obs
● 2016-03-30 16:43:20
○ 2016-08-04 15:13:42
● 2016-09-08 21:56:28
● 2017-08-21 04:48:24
○ 2026-04-03 23:35:08
○ 2026-04-24 05:32:46
○NSns02.yahoodomains.jp2015-06-17 → 2017-08-21 · 7 obs
● 2016-03-30 16:43:20
○ 2016-08-04 15:13:42
● 2016-09-08 21:56:28
● 2017-08-21 04:48:24
○ 2026-04-03 23:35:08
○ 2026-04-24 05:32:46
●NSns1.dns.ne.jp2026-04-03 → 2026-04-24 · 3 obs
● 2026-04-03 23:35:08
● 2026-04-24 05:32:46
●NSns2.dns.ne.jp2026-04-03 → 2026-04-24 · 3 obs
● 2026-04-03 23:35:08
● 2026-04-24 05:32:46
●MX403k.net2026-04-03 → 2026-04-24 · 3 obs
● 2026-04-03 23:35:08
● 2026-04-24 05:32:46
○MXmailt.do-reg.jp2015-06-17 → 2017-08-21 · 7 obs
● 2016-03-30 16:43:20
○ 2016-08-04 15:13:42
● 2016-09-08 21:56:28
● 2017-08-21 04:48:24
○ 2026-04-03 23:35:08
○ 2026-04-24 05:32:46
●A2001:e42:101:2:202:181:99:212026-04-03 → 2026-04-24 · 3 obs
● 2026-04-03 23:35:08
● 2026-04-24 05:32:46
●A202.181.99.212026-04-03 → 2026-04-24 · 3 obs
● 2026-04-03 23:35:08
● 2026-04-24 05:32:46
○A210.168.35.32015-06-17 → 2017-08-21 · 7 obs
● 2016-03-30 16:43:20
○ 2016-08-04 15:13:42
● 2016-09-08 21:56:28
● 2017-08-21 04:48:24
○ 2026-04-03 23:35:08
○ 2026-04-24 05:32:46
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| 403k.net | ns1.dns.ne.jp, ns2.dns.ne.jp | - |
✅ 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 403k.net (unsigned zone)
⏱️ Timing
Total: 972ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 202.181.99.21 |
| AAAA | 1 | 2001:e42:101:2:202:181:99:21 |
| NS | 2 | ns1.dns.ne.jp, ns2.dns.ne.jp |
| MX | 1 | 403k.net (pri: 10) |
| TXT | 1 | v=spf1 a:www301.sakura.ne.jp mx ~all |
| SOA | 1 | master.dns.ne.jp tech.sakura.ad.jp |
Analysis
Mail Server Role
403k.net is the mail server for 403k.net.
IP Addresses
403k.net resolves to two IP numbers: 2001:e42:101:2:202:181:99:21 and 202.181.99.21.
Other host names, for instance azmac.jp, taaad.net, mail.a-way-out.net, ibm.sakura.ne.jp and nishiden.biz share IP numbers with 403k.net.
Name Servers
403k.net delegates to three name servers: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.
403k.net shares some name servers with other domains, for example cuts.jp, kuma-dental.com, bisaijp.sakura.ne.jp, hirooka-blog.com and kato-ladies-clinic.com.
These name servers are commonly used 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
One mail server handles 403k.net.
403k.net resolves to two IPs: 2001:e42:101:2:202:181:99:21 and 202.181.99.21.