backer.jp - robtex.com
backer.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 49.212.198.21🇯🇵 SAKURA-C49.212.0.0/16 (7/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www2811.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 | backer.jp ⭐ | ||||||
| A | 49.212.198.21🇯🇵 SAKURA-C49.212.0.0/16 (7/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www2811.sakura.ne.jp | ||||||
| TXT | v=spf1 a:www2811.sakura.ne.jp mx ~all | ||||||
| SOA | master.dns.ne.jptech@sakura.ad.jp 2024-12-18 #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=1779254102 | ||||||
MX for
backer.jp |
Same first word
Similar names
DNS History
5 records (5 active, 0 former)
●MXbacker.jp2015-06-19 → 2026-05-20 · 2 obs
● 2026-05-20 05:48:54
●A49.212.198.212015-06-19 → 2026-05-20 · 2 obs
● 2026-05-20 05:48:54
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| backer.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 backer.jp (unsigned zone)
⏱️ Timing
Total: 948ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 49.212.198.21 |
| NS | 2 | ns1.dns.ne.jp, ns2.dns.ne.jp |
| MX | 1 | backer.jp (pri: 10) |
| TXT | 1 | v=spf1 a:www2811.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
backer.jp handles its own mail, functioning as its own mail server.
IP Addresses
backer.jp resolves to just one IP address, 49.212.198.21.
Two other host names, along with plan-ll.com, kanbarayakkyoku.com and oph.aoba-shk.jp, also share IP numbers with backer.jp.
Name Servers
Three name servers are authoritative for backer.jp: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.
The name servers of backer.jp overlap at least partially with those of other domains — among them jrage-mail-4.sakura.ne.jp, narrative-home.sakura.ne.jp, incage.net and two more.
Three hostnames, one IP address apiece: master.dns.ne.jp resolves to 210.224.172.18, ns1.dns.ne.jp resolves to 61.211.236.1 and ns2.dns.ne.jp resolves to 133.167.21.1.
Mail Servers
backer.jp is served by just one mail server: backer.jp.
There is one IP number for backer.jp: 49.212.198.21.