f-brain.net - robtex.com
f-brain.net
| DNSSEC | ⚠️ Not signed | ||||||
| A | 216.230.253.75🇺🇸 PSPinc216.230.248.0/21 Pacific Software Publishing, Inc. 1404 140th Place NE Bellevue WA 98007 US | ||||||
| PTR | webltw75.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 2023-07-26 #0 | ||||||
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=1775133462 | ||||||
Same first word
Similar names
DNS History
8 records (8 active, 0 former)
●NSamdns03.alpha-mail.jp2026-02-17 → 2026-04-02 · 2 obs
● 2026-04-02 12:50:38
●NSkotetsu.alpha-lt.net2026-02-17 → 2026-04-02 · 2 obs
● 2026-04-02 12:50:38
●NStsukuba.aics.ne.jp2026-02-17 → 2026-04-02 · 2 obs
● 2026-04-02 12:50:38
●MXampub01.alpha-mail.net2026-02-17 → 2026-04-02 · 2 obs
● 2026-04-02 12:50:38
●MXampub02.alpha-mail.net2026-02-17 → 2026-04-02 · 2 obs
● 2026-04-02 12:50:38
●MXampub03.alpha-mail.net2026-02-17 → 2026-04-02 · 2 obs
● 2026-04-02 12:50:38
●MXampub04.alpha-mail.net2026-02-17 → 2026-04-02 · 2 obs
● 2026-04-02 12:50:38
●A216.230.253.752026-02-17 → 2026-04-02 · 2 obs
● 2026-04-02 12:50:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| f-brain.net | 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 f-brain.net (unsigned zone)
⏱️ Timing
Total: 1670ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 216.230.253.75 |
| NS | 3 | tsukuba.aics.ne.jp, amdns03.alpha-mail.jp... |
| MX | 4 | ampub04.alpha-mail.net (pri: 50), ampub02.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 (kotetsu.alpha-lt.net)
Analysis
IP Addresses
f-brain.net maps to IP address 216.230.253.75.
Other host names, for instance ni-che.jp, nextone.net, ni-no.jp, comia.jp and 27wakop.jp share IP numbers with f-brain.net.
Name Servers
f-brain.net is delegated to name servers amdns03.alpha-mail.jp, kotetsu.alpha-lt.net and tsukuba.aics.ne.jp.
f-brain.net at least partially shares name servers with other domains such as vingte.com, nasc.jp, sukai.co.jp, ex-form.jp and fresh-home.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
f-brain.net is handled by four mail servers: ampub01.alpha-mail.net, ampub02.alpha-mail.net, ampub03.alpha-mail.net and ampub04.alpha-mail.net.
f-brain.net shares mail servers with other domains at least in part, for instance hse2006.co.jp, tts-web.jp, kumanoen.co.jp, nanb.co.jp and otos.co.jp.
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