actfirst.co.jp - robtex.com
actfirst.co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 153.127.214.180🇯🇵 SAKURA-A153.127.192.0/19 (ISHIKARI) SAKURA Internet // HOKKAIDO JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan | ||||||
| PTR | www4040.sakura.ne.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 | ||||||
| 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 | ||||||
| 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 2023-07-23 #0 | ||||||
co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| TXT | co.jp. | ||||||
Same first word
Similar names
DNS History
9 records (8 active, 1 former)
●NSamdns03.alpha-mail.jp2026-06-26 → 2026-07-15 · 3 obs
● 2026-06-26 19:20:42
● 2026-07-15 17:06:20
●NSkotetsu.alpha-lt.net2015-05-07 → 2026-07-15 · 2 obs
● 2026-07-15 17:06:20
●NStsukuba.aics.ne.jp2015-05-07 → 2026-07-15 · 2 obs
● 2026-07-15 17:06:20
●MXampub01.alpha-mail.net2015-05-07 → 2026-07-15 · 2 obs
● 2026-07-15 17:06:20
●MXampub02.alpha-mail.net2015-05-07 → 2026-07-15 · 2 obs
● 2026-07-15 17:06:20
●MXampub03.alpha-mail.net2015-05-07 → 2026-07-15 · 2 obs
● 2026-07-15 17:06:20
●MXampub04.alpha-mail.net2026-06-26 → 2026-07-15 · 3 obs
● 2026-06-26 19:20:42
● 2026-07-15 17:06:20
●A153.127.214.1802026-06-26 → 2026-07-15 · 3 obs
● 2026-06-26 19:20:42
● 2026-07-15 17:06:20
○A216.230.250.1812015-05-07 → 2017-03-31 · 4 obs
● 2017-03-31 21:07:10
○ 2026-06-26 19:20:42
○ 2026-07-15 17:06:20
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| actfirst.co.jp | kotetsu.alpha-lt.net, tsukuba.aics.ne.jp, amdns03.alpha-mail.jp | 1 record |
✅ 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 actfirst.co.jp (unsigned zone)
⏱️ Timing
Total: 1520ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 153.127.214.180 |
| NS | 3 | amdns03.alpha-mail.jp, tsukuba.aics.ne.jp... |
| MX | 4 | ampub02.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 |
📌 Glue Records Collected
Total: 1
Out-of-bailiwick: 1 (amdns03.alpha-mail.jp)
Analysis
IP Addresses
actfirst.co.jp has exactly one IP address — 153.127.214.180.
jrad.jp, f-c-c.net, mon-ey.jp plus two other host names have IP numbers in common with actfirst.co.jp.
Name Servers
The authoritative name servers for actfirst.co.jp are amdns03.alpha-mail.jp, kotetsu.alpha-lt.net and tsukuba.aics.ne.jp — three in total.
actfirst.co.jp has at least partial name server overlap with other domains, such as inahou.com, cstj.co.jp, ka-ise.com and two others.
The hostnames amdns03.alpha-mail.jp, kotetsu.alpha-lt.net and tsukuba.aics.ne.jp each resolve to a single IP: amdns03.alpha-mail.jp → 216.230.254.112, kotetsu.alpha-lt.net → 157.205.252.6, tsukuba.aics.ne.jp → 157.205.252.7.
Mail Servers
Four mail servers handle email for actfirst.co.jp: ampub01.alpha-mail.net, ampub02.alpha-mail.net, ampub03.alpha-mail.net and ampub04.alpha-mail.net.
At least some of the mail servers used by actfirst.co.jp are shared with other domains: hangloose-web.jp, krank.jp, to-sai.co.jp and two others among them.
Four host names, each with one IP address: ampub01.alpha-mail.net has 216.230.254.1, ampub02.alpha-mail.net has 216.230.254.2, ampub03.alpha-mail.net has 216.230.254.3 and ampub04.alpha-mail.net has 216.230.254.4.