ots-ko.com - robtex.com
ots-ko.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 216.230.253.78🇺🇸 PSPinc216.230.248.0/21 Pacific Software Publishing, Inc. 1404 140th Place NE Bellevue WA 98007 US | ||||||
| PTR | webltw78.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 2023-07-27 #8 | ||||||
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=1778424886 | ||||||
Subdomains
smtp.ots-ko.com |
Same first word
ots-ko.com |
Similar names
DNS History
9 records (8 active, 1 former)
●NSamdns03.alpha-mail.jp2026-04-05 → 2026-05-10 · 3 obs
● 2026-04-05 12:59:24
● 2026-05-10 14:57:38
●NSkotetsu.alpha-lt.net2015-07-31 → 2026-05-10 · 2 obs
● 2026-05-10 14:57:38
●NStsukuba.aics.ne.jp2015-07-31 → 2026-05-10 · 2 obs
● 2026-05-10 14:57:38
●MXampub01.alpha-mail.net2015-07-31 → 2026-05-10 · 2 obs
● 2026-05-10 14:57:38
●MXampub02.alpha-mail.net2015-07-31 → 2026-05-10 · 2 obs
● 2026-05-10 14:57:38
●MXampub03.alpha-mail.net2015-07-31 → 2026-05-10 · 2 obs
● 2026-05-10 14:57:38
●MXampub04.alpha-mail.net2018-12-09 → 2026-05-10 · 3 obs
● 2018-12-09 22:32:22
● 2026-05-10 14:57:38
○A216.230.250.1722015-07-31 → 2018-12-09 · 4 obs
● 2018-12-09 22:32:22
○ 2026-04-05 12:59:24
○ 2026-05-10 14:57:38
●A216.230.253.782026-04-05 → 2026-05-10 · 3 obs
● 2026-04-05 12:59:24
● 2026-05-10 14:57:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| ots-ko.com | kotetsu.alpha-lt.net, tsukuba.aics.ne.jp, amdns03.alpha-mail.jp | - |
✅ Authoritative Response
Server:216.230.254.112
NS records: kotetsu.alpha-lt.net, tsukuba.aics.ne.jp, amdns03.alpha-mail.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for ots-ko.com (unsigned zone)
⏱️ Timing
Total: 1899ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 216.230.253.78 |
| NS | 3 | amdns03.alpha-mail.jp, tsukuba.aics.ne.jp... |
| MX | 4 | ampub04.alpha-mail.net (pri: 50), 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
Hierarchy
smtp.ots-ko.com is a child of ots-ko.com.
IP Addresses
ots-ko.com resolves to one IP number: 216.230.253.78.
Other host names, for instance neo-sekisan.co.jp, kohken-h.com, ky-eng.jp, netsvc.co.jp and wb-japan.co.jp share IP numbers with ots-ko.com.
Name Servers
ots-ko.com is delegated to three name servers: amdns03.alpha-mail.jp, kotetsu.alpha-lt.net and tsukuba.aics.ne.jp.
ots-ko.com at least partially shares name servers with other domains, including sekkatei.com, matsuse-iin.com, aaa-sekkei.co.jp, arby.jp and san-o.co.jp.
Host names with a single IP:
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
ots-ko.com is handled by four mail servers: ampub01.alpha-mail.net, ampub02.alpha-mail.net, ampub03.alpha-mail.net and ampub04.alpha-mail.net.
ots-ko.com shares at least some mail servers with other domains, for example ihs-i.co.jp, ikiikisya.com, mdb-design.co.jp, i-frm.biz and tokyojump.com.
Host names with one IP number:
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.