rk-sys.jp - robtex.com

rk-sys.jp

DNSSEC⚠️ Not signed
A210.166.73.77🇯🇵 AIR210.166.64.0/19 CIDR BLOCK 2 ( AS7503 ) 1-10-4 Kita-shinagawa, Shinagawa-ku, Tokyo, 140-0001, Japan
PTRrk-sys.jp
NSdns1.air.ne.jp ⭐
A210.159.75.250🇯🇵 AIR210.159.64.0/19 CIDR BLOCK 1 ( AS7503 ) 1-10-4 Kita-shinagawa, Shinagawa-ku, Tokyo, 140-0001, Japan
PTRdns1.air.ne.jp
NSdns2.air.ne.jp
A210.166.78.250🇯🇵 AIR210.166.64.0/19 CIDR BLOCK 2 ( AS7503 ) 1-10-4 Kita-shinagawa, Shinagawa-ku, Tokyo, 140-0001, Japan
PTRdns2.air.ne.jp
NSdns3.air.ne.jp
A210.166.79.250🇯🇵 AIR210.166.64.0/19 CIDR BLOCK 2 ( AS7503 ) 1-10-4 Kita-shinagawa, Shinagawa-ku, Tokyo, 140-0001, Japan
PTRdns3.air.ne.jp
NSdns4.air.ne.jp
A210.166.92.250🇯🇵 AIR210.166.92.0/22 Aggregate for Customer Prefixes
PTRdns4.air.ne.jp
MXmxin1.airnet.ne.jp ⭐
A210.159.71.90🇯🇵 AIR210.159.64.0/19 CIDR BLOCK 1 ( AS7503 ) 1-10-4 Kita-shinagawa, Shinagawa-ku, Tokyo, 140-0001, Japan
PTRmxin1-01.airnet.ne.jp
A210.166.71.20🇯🇵 AIR210.166.64.0/19 CIDR BLOCK 2 ( AS7503 ) 1-10-4 Kita-shinagawa, Shinagawa-ku, Tokyo, 140-0001, Japan
PTRmxin1-02.airnet.ne.jp
MXmxin2.airnet.ne.jp ⭐
A210.159.71.91🇯🇵 AIR210.159.64.0/19 CIDR BLOCK 1 ( AS7503 ) 1-10-4 Kita-shinagawa, Shinagawa-ku, Tokyo, 140-0001, Japan
PTRmxin2-01.airnet.ne.jp
A210.166.71.21🇯🇵 AIR210.166.64.0/19 CIDR BLOCK 2 ( AS7503 ) 1-10-4 Kita-shinagawa, Shinagawa-ku, Tokyo, 140-0001, Japan
PTRmxin2-02.airnet.ne.jp
TXTv=spf1 include:_spf.r-keeper.jp include:spf01.air.ad.jp include:_spf.new.r-ke...
SOAdns1.air.ne.jpsupport@air.ad.jp 2026-07-22 #2

jp

DNSSEC🔒 Signed (DS record present)
NSz.dns.jp ⭐
NSa.dns.jp
NSb.dns.jp
NSc.dns.jp
NSd.dns.jp
NSe.dns.jp
NSf.dns.jp
NSg.dns.jp
NSh.dns.jp
SOAz.dns.jproot@dns.jp serial=1786077903

PTR for

41.73.166.210.in-addr.arpa

Subdomains

tds.rk-sys.jp

Same first word

rk-sys.jp

Similar names

kr-sys.net

DNS History

9 records (7 active, 2 former)

20162017201820192020202120222023202420252026NSdns1.air.ne.jpdns2.air.ne.jpdns3.air.ne.jpdns4.air.ne.jpMXmxin1.airnet.ne.jpmxin2.airnet.ne.jpA210.166.73.77210.166.73.41210.166.76.138
●NSdns1.air.ne.jp2015-08-11 → 2026-08-07 · 2 obs
● 2015-08-11 19:48:18
● 2026-08-07 05:06:46
●NSdns2.air.ne.jp2015-08-11 → 2026-08-07 · 2 obs
● 2015-08-11 19:48:18
● 2026-08-07 05:06:46
●NSdns3.air.ne.jp2015-08-11 → 2026-08-07 · 2 obs
● 2015-08-11 19:48:18
● 2026-08-07 05:06:46
●NSdns4.air.ne.jp2015-08-11 → 2026-08-07 · 2 obs
● 2015-08-11 19:48:18
● 2026-08-07 05:06:46
●MXmxin1.airnet.ne.jp2015-08-11 → 2026-08-07 · 2 obs
● 2015-08-11 19:48:18
● 2026-08-07 05:06:46
●MXmxin2.airnet.ne.jp2015-08-11 → 2026-08-07 · 2 obs
● 2015-08-11 19:48:18
● 2026-08-07 05:06:46
○A210.166.73.412026-03-08 → 2026-03-08 · 3 obs
○ 2018-06-17 21:02:14
● 2026-03-08 05:00:10
○ 2026-08-07 05:06:46
●A210.166.73.772026-08-07 → 2026-08-07 · 2 obs
○ 2026-03-08 05:00:10
● 2026-08-07 05:06:46
○A210.166.76.1382015-08-11 → 2018-06-17 · 4 obs
● 2015-08-11 19:48:18
● 2018-06-17 21:02:14
○ 2026-03-08 05:00:10
○ 2026-08-07 05:06:46

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
jpe.dns.jp, h.dns.jp, c.dns.jp, f.dns.jp...-
rk-sys.jpdns4.air.ne.jp, dns3.air.ne.jp, dns1.air.ne.jp, dns2.air.ne.jp-

✅ Authoritative Response

Server:210.166.92.250

NS records: dns4.air.ne.jp, dns3.air.ne.jp, dns1.air.ne.jp, dns2.air.ne.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rk-sys.jp (unsigned zone)

⏱️ Timing

Total: 1451ms | Queries: -

📄 Records

TypeCountSample Data
A1210.166.73.77
NS4dns1.air.ne.jp, dns2.air.ne.jp...
MX2mxin1.airnet.ne.jp (pri: 10), mxin2.airnet.ne.jp (pri: 10)
TXT1v=spf1 include:_spf.r-keeper.jp include:
SOA1dns1.air.ne.jp support.air.ad.jp

Analysis

Hierarchy

rk-sys.jp is the parent zone for tds.rk-sys.jp.

IP Addresses

rk-sys.jp points to a single IP number: 210.166.73.77.

Name Servers

rk-sys.jp has four authoritative name servers: dns1.air.ne.jp, dns2.air.ne.jp, dns3.air.ne.jp and dns4.air.ne.jp.

rk-sys.jp partially shares its NS delegation with several other domains, including twomix.co.jp, zanmai.tv, handle.jp and two others.

dns1.air.ne.jp, dns2.air.ne.jp, dns3.air.ne.jp and dns4.air.ne.jp each resolve to one IP address: dns1.air.ne.jp resolves to 210.159.75.250, dns2.air.ne.jp resolves to 210.166.78.250, dns3.air.ne.jp resolves to 210.166.79.250 and dns4.air.ne.jp resolves to 210.166.92.250.

Mail Servers

rk-sys.jp has two mail servers: mxin1.airnet.ne.jp and mxin2.airnet.ne.jp.

rk-sys.jp shares the same mail server setup as other domains, including toadkk.co.jp, yoshino-gypsum.co.jp, ampule.jp and two others.

The MX records for rk-sys.jp are at least partially shared with other domains, such as softex.co.jp, nskre.co.jp, takanokeiki.co.jp and camerium.com.

mxin1.airnet.ne.jp directs to 210.159.71.90 and 210.166.71.20. mxin2.airnet.ne.jp directs to 210.159.71.91 and 210.166.71.21. Each host name carries two IP addresses.