k-kosho.com - robtex.com
k-kosho.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 216.230.253.73🇺🇸 PSPinc216.230.248.0/21 Pacific Software Publishing, Inc. 1404 140th Place NE Bellevue WA 98007 US | ||||||
| PTR | webltw73.alpha-mail.jp | ||||||
| NS | kotetsu.alpha-lt.net ⭐ | ||||||
| A | 157.205.252.6🇯🇵 AICS157.205.0.0/16 PACNET (proxy-registered route object) | ||||||
| PTR | amdns01.alpha-mail.jp | ||||||
| NS | amdns03.alpha-mail.jp | ||||||
| A | 216.230.254.112🇺🇸 PSPinc216.230.248.0/21 Pacific Software Publishing, Inc. 1404 140th Place NE Bellevue WA 98007 US | ||||||
| PTR | amdns03.alpha-mail.jp | ||||||
| NS | tsukuba.aics.ne.jp | ||||||
| A | 157.205.252.7🇯🇵 AICS157.205.0.0/16 PACNET (proxy-registered route object) | ||||||
| PTR | amdns02.alpha-mail.jp | ||||||
| MX | ampub01.alpha-mail.net ⭐ | ||||||
| A | 216.230.254.1🇺🇸 PSPinc216.230.248.0/21 Pacific Software Publishing, Inc. 1404 140th Place NE Bellevue WA 98007 US | ||||||
| PTR | ampub01.alpha-mail.net | ||||||
| MX | ampub02.alpha-mail.net ⭐ | ||||||
| A | 216.230.254.2🇺🇸 PSPinc216.230.248.0/21 Pacific Software Publishing, Inc. 1404 140th Place NE Bellevue WA 98007 US | ||||||
| PTR | ampub02.alpha-mail.net | ||||||
| MX | ampub03.alpha-mail.net ⭐ | ||||||
| A | 216.230.254.3🇺🇸 PSPinc216.230.248.0/21 Pacific Software Publishing, Inc. 1404 140th Place NE Bellevue WA 98007 US | ||||||
| PTR | ampub03.alpha-mail.net | ||||||
| MX | ampub04.alpha-mail.net(50) | ||||||
| A | 216.230.254.4🇺🇸 PSPinc216.230.248.0/21 Pacific Software Publishing, Inc. 1404 140th Place NE Bellevue WA 98007 US | ||||||
| PTR | ampub04.alpha-mail.net | ||||||
| TXT | v=spf1 ip4:157.205.202.0/24 ip4:157.205.203.128/25 ip4:216.230.250.0/24 ip4:2... | ||||||
| SOA | kotetsu.alpha-lt.netpostmaster@alpha-web.ne.jp 2023-08-02 #0 | ||||||
com
| 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=1778701381 | ||||||
Same first word
DNS History
9 records (8 active, 1 former)
●NSamdns03.alpha-mail.jp2026-02-25 → 2026-05-13 · 3 obs
● 2026-02-25 10:19:06
● 2026-05-13 19:45:10
●NSkotetsu.alpha-lt.net2016-12-21 → 2026-05-13 · 2 obs
● 2026-05-13 19:45:10
●NStsukuba.aics.ne.jp2016-12-21 → 2026-05-13 · 2 obs
● 2026-05-13 19:45:10
●MXampub01.alpha-mail.net2016-12-21 → 2026-05-13 · 2 obs
● 2026-05-13 19:45:10
●MXampub02.alpha-mail.net2016-12-21 → 2026-05-13 · 2 obs
● 2026-05-13 19:45:10
●MXampub03.alpha-mail.net2016-12-21 → 2026-05-13 · 2 obs
● 2026-05-13 19:45:10
●MXampub04.alpha-mail.net2026-02-25 → 2026-05-13 · 3 obs
● 2026-02-25 10:19:06
● 2026-05-13 19:45:10
○A216.230.250.1872016-12-21 → 2017-11-16 · 4 obs
● 2017-11-16 11:15:48
○ 2026-02-25 10:19:06
○ 2026-05-13 19:45:10
●A216.230.253.732026-02-25 → 2026-05-13 · 3 obs
● 2026-02-25 10:19:06
● 2026-05-13 19:45:10
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net... | - |
| k-kosho.com | kotetsu.alpha-lt.net, tsukuba.aics.ne.jp, amdns03.alpha-mail.jp | - |
✅ Authoritative Response
Server:157.205.252.6
NS records: kotetsu.alpha-lt.net, tsukuba.aics.ne.jp, amdns03.alpha-mail.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for k-kosho.com (unsigned zone)
⏱️ Timing
Total: 4240ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 216.230.253.73 |
| NS | 3 | amdns03.alpha-mail.jp, kotetsu.alpha-lt.net... |
| MX | 4 | ampub01.alpha-mail.net (pri: 10), ampub03.alpha-mail.net (pri: 10)... |
| TXT | 1 | v=spf1 ip4:157.205.202.0/24 ip4:157.205. |
| SOA | 1 | kotetsu.alpha-lt.net postmaster.alpha-we |
Analysis
IP Addresses
k-kosho.com points to IP number 216.230.253.73.
For instance, other host names z-design.co.jp, analog-core-tech.com, ryuei.com, miyukikai.com and aqualogic.jp share IP numbers with k-kosho.com.
Name Servers
The delegation for k-kosho.com is handled by three name servers: amdns03.alpha-mail.jp, kotetsu.alpha-lt.net and tsukuba.aics.ne.jp.
k-kosho.com shares name servers with other domains at least partially, for example art-giken.com, lodestars.co.jp, kai-syu.co.jp, kodomosinsin.com and meiho-net.co.jp.
Host names with a single IP address: amdns03.alpha-mail.jp points to 216.230.254.112; kotetsu.alpha-lt.net points to 157.205.252.6; tsukuba.aics.ne.jp points to 157.205.252.7.
Mail Servers
k-kosho.com is handled by four mail servers: ampub01.alpha-mail.net, ampub02.alpha-mail.net, ampub03.alpha-mail.net and ampub04.alpha-mail.net.
k-kosho.com shares mail servers with other domains at least partially; for instance senshuelectric.co.jp, tenmawel.com, zenrekiken.jp, ts-law.jp and kirie-m.co.jp.
Host names with a single IP:
ampub01.alpha-mail.net points to 216.230.254.1
ampub02.alpha-mail.net points to 216.230.254.2
ampub03.alpha-mail.net points to 216.230.254.3
ampub04.alpha-mail.net points to 216.230.254.4