rcfc.jp - robtex.com
rcfc.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 49.212.239.149🇯🇵 SAKURA-A49.212.239.0/24 (ISHIKARI) SAKURA Internet // HOKKAIDO JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka-shi, Osaka 530-0011, Japan | ||||||
| PTR | 149.239.212.49.static.www6821m.sakura.ne.jp | ||||||
| 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 | rcfc.jp ⭐ | ||||||
| A | 49.212.239.149🇯🇵 SAKURA-A49.212.239.0/24 (ISHIKARI) SAKURA Internet // HOKKAIDO JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka-shi, Osaka 530-0011, Japan | ||||||
| PTR | 149.239.212.49.static.www6821m.sakura.ne.jp | ||||||
| TXT | v=spf1 a:www6821m.sakura.ne.jp mx ~all | ||||||
| SOA | master.dns.ne.jptech@sakura.ad.jp 2021-01-13 #1 | ||||||
jp
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | z.dns.jp ⭐ | ||||||
| NS | a.dns.jp | ||||||
| NS | b.dns.jp | ||||||
| NS | c.dns.jp | ||||||
| NS | d.dns.jp | ||||||
| NS | e.dns.jp | ||||||
| NS | f.dns.jp | ||||||
| NS | g.dns.jp | ||||||
| NS | h.dns.jp | ||||||
| SOA | z.dns.jproot@dns.jp serial=1778358602 | ||||||
MX for
rcfc.jp |
Same first word
Similar names
DNS History
7 records (5 active, 2 former)
○NSdns-b.iij.ad.jp2015-06-15 → 2016-07-15 · 4 obs
● 2016-07-15 03:51:50
○ 2026-04-07 22:08:54
○ 2026-05-09 20:41:02
○NSdns-c.iij.ad.jp2015-06-15 → 2016-07-15 · 4 obs
● 2016-07-15 03:51:50
○ 2026-04-07 22:08:54
○ 2026-05-09 20:41:02
●NSmaster.dns.ne.jp2026-04-07 → 2026-05-09 · 3 obs
● 2026-04-07 22:08:54
● 2026-05-09 20:41:02
●NSns1.dns.ne.jp2026-04-07 → 2026-05-09 · 3 obs
● 2026-04-07 22:08:54
● 2026-05-09 20:41:02
●NSns2.dns.ne.jp2026-04-07 → 2026-05-09 · 3 obs
● 2026-04-07 22:08:54
● 2026-05-09 20:41:02
●MXrcfc.jp2026-04-07 → 2026-05-09 · 2 obs
● 2026-05-09 20:41:02
●A49.212.239.1492026-04-07 → 2026-05-09 · 2 obs
● 2026-05-09 20:41:02
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| rcfc.jp | ns1.dns.ne.jp, ns2.dns.ne.jp | 2 records |
✅ 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 rcfc.jp (unsigned zone)
⏱️ Timing
Total: 917ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 49.212.239.149 |
| NS | 2 | ns1.dns.ne.jp, ns2.dns.ne.jp |
| MX | 1 | rcfc.jp (pri: 10) |
| TXT | 1 | v=spf1 a:www6821m.sakura.ne.jp mx ~all |
| SOA | 1 | master.dns.ne.jp tech.sakura.ad.jp |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns1.dns.ne.jp, ns2.dns.ne.jp)
Analysis
Mail Server Role
rcfc.jp serves as the mail server for rcfc.jp.
IP Addresses
rcfc.jp resolves to a single IP address: 49.212.239.149.
Other host names, such as 149.239.212.49.static.www6821m.sakura.ne.jp and tamacomi.com, share IP numbers with rcfc.jp.
Name Servers
rcfc.jp is delegated to three name servers: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.
rcfc.jp at least partially shares name servers with other domains, including j-c-law.com, caellum.co.uk, myutils.net, jt-i.jp and ojimabankin.sakura.ne.jp.
These name servers are often used together with dns.sakura.ad.jp.
Hostnames 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
A single mail server handles rcfc.jp.
rcfc.jp points to a single IP: 49.212.239.149.