gmail21.com - dns.ninja

gmail21.com

DNSSEC⚠️ Not signed
A133.242.191.43🇯🇵 SAKURA-A133.242.0.0/16 (1/ISHIKARI) SAKURA Internet // HOKKAIDO BACKBONE 1-8-14 Minami-Honmachi, Chuo-ku, Osaka 541-0054, Japan
PTRik1-132-72789.vs.sakura.ne.jp
NS01.dnsv.jp ⭐
A2400:8500:3300::53🇯🇵 GMO-DNS2400:8500:3300::/48 GMO Internet,inc.
PTR01.dnsv.jp
A157.7.32.53🇯🇵 GMO-DNS157.7.32.0/24 GMO Internet,inc. Network-Team.
PTR01.dnsv.jp
NS02.dnsv.jp
A157.7.33.53🇯🇵 GMO-DNS157.7.33.0/24 GMO Internet,inc. Network-Team.
PTR02.dnsv.jp
NS03.dnsv.jp
A2400:8500:3000::53🇯🇵 GMO-DNS2400:8500:3000::/48 GMO Internet,inc.
PTR03.dnsv.jp
A157.7.34.53🇯🇵 GMO-DNS157.7.34.0/24 GMO Internet,inc. Network-Team.
PTR03.dnsv.jp
NS04.dnsv.jp
A2400:8500:3fff::53🇯🇵 GMO-DNS2400:8500:3fff::/48 GMO Internet,inc.
PTR04.dnsv.jp
A157.7.35.53🇯🇵 GMO-DNS157.7.35.0/24 GMO Internet,inc. Network-Team.
PTR04.dnsv.jp
MXsmtp.gmail21.com ⭐
A133.242.191.43🇯🇵 SAKURA-A133.242.0.0/16 (1/ISHIKARI) SAKURA Internet // HOKKAIDO BACKBONE 1-8-14 Minami-Honmachi, Chuo-ku, Osaka 541-0054, Japan
PTRik1-132-72789.vs.sakura.ne.jp
TXTgoogle-site-verification=Jbe838TNan8KR3Z_KfYpYjPhJzpkZ8KMrceiyJDAoXA
TXTv=spf1 mx ip4:133.242.191.43 -all
SOA01.dnsv.jphostmaster@dnsv.jp serial=1684120633

com

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1785670302

Previously MX for

gmail21.com

Subdomains

smtp.gmail21.com

Same first word

gmail21.com

Similar names

21gmail.net
21gmail.com

DNS History

8 records (6 active, 2 former)

2017201820192020202120222023202420252026NS01.dnsv.jp02.dnsv.jp03.dnsv.jp04.dnsv.jpMXsmtp.gmail21.comgmail21.comA133.242.191.43157.7.143.45
●NS01.dnsv.jp2016-12-14 → 2026-08-02 · 2 obs
● 2016-12-14 17:11:34
● 2026-08-02 11:40:08
●NS02.dnsv.jp2016-12-14 → 2026-08-02 · 2 obs
● 2016-12-14 17:11:34
● 2026-08-02 11:40:08
●NS03.dnsv.jp2016-12-14 → 2026-08-02 · 2 obs
● 2016-12-14 17:11:34
● 2026-08-02 11:40:08
●NS04.dnsv.jp2016-12-14 → 2026-08-02 · 2 obs
● 2016-12-14 17:11:34
● 2026-08-02 11:40:08
○MXgmail21.com2016-12-14 → 2017-08-17 · 4 obs
● 2016-12-14 17:11:34
● 2017-08-17 10:10:56
○ 2017-10-05 04:21:10
○ 2026-08-02 11:40:08
●MXsmtp.gmail21.com2017-10-05 → 2026-08-02 · 3 obs
○ 2017-08-17 10:10:56
● 2017-10-05 04:21:10
● 2026-08-02 11:40:08
●A133.242.191.432026-03-18 → 2026-08-02 · 3 obs
○ 2018-08-16 17:45:50
● 2026-03-18 21:19:28
● 2026-08-02 11:40:08
○A157.7.143.452016-12-14 → 2018-08-16 · 4 obs
● 2016-12-14 17:11:34
● 2018-08-16 17:45:50
○ 2026-03-18 21:19:28
○ 2026-08-02 11:40:08

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
gmail21.com01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp, 04.dnsv.jp-

✅ Authoritative Response

Server:157.7.33.53

NS records: 01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp, 04.dnsv.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for gmail21.com (unsigned zone)

⏱️ Timing

Total: 926ms | Queries: -

📄 Records

TypeCountSample Data
A1133.242.191.43
NS401.dnsv.jp, 02.dnsv.jp...
MX1smtp.gmail21.com (pri: 20)
TXT2google-site-verification=Jbe838TNan8KR3Z, v=spf1 mx ip4:133.242.191.43 -all
SOA101.dnsv.jp hostmaster.dnsv.jp

Analysis

Hierarchy

smtp.gmail21.com is delegated beneath gmail21.com.

IP Addresses

gmail21.com directs to one IP number, which is 133.242.191.43.

Among the host names that share IP numbers with gmail21.com are smtp.macmail.biz, webmail-jp.com, smtp.webmail-jp.com and two others.

Name Servers

The domain gmail21.com is delegated to these four name servers: 01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp and 04.dnsv.jp.

There is at least partial name server overlap between gmail21.com and other domains — fix-auto2-4.com, g-nomiyama.com, akai-taxoffice.com and two more among them.

Hosts with two IP numbers each:

01.dnsv.jp maps to two IP addresses — 157.7.32.53 and 2400:8500:3300::53.

03.dnsv.jp maps to two IP addresses — 157.7.34.53 and 2400:8500:3000::53.

04.dnsv.jp maps to two IP addresses — 157.7.35.53 and 2400:8500:3fff::53.

Hosts that resolve to one IP address:

02.dnsv.jp points to the IP address 157.7.33.53.

Mail Servers

gmail21.com routes its mail through a single mail server, smtp.gmail21.com.

There is one IP number for smtp.gmail21.com: 133.242.191.43.