itcom21.com - dns.ninja

`itcom21.com`

DNSSEC	🔒 Signed (DS record present)
NS	`ns000.d-53.net` ⭐
NS	`ns017-p3f9sk5npcu30u1r.p.d-53.info`
		A	2001:240:bb81::28:48^{🇯🇵 IIJ-AS2001:240::/32 IIJ IPv6 BLOCK ( AS2497 )}
			PTR	`s017.d-53.biz`
		A	202.32.219.48^{🇯🇵 IIJ-AS202.32.0.0/16 IIJ IPv4 BLOCK ( AS2497 )}
			PTR	`s017.d-53.biz`
NS	`ns017-p3f9sk5npcu30u1r.p.d-53.jp`
		A	2001:240:bb81::29:1108^{🇯🇵 IIJ-AS2001:240::/32 IIJ IPv6 BLOCK ( AS2497 )}
			PTR	`s017.d-53.org`
		A	203.180.146.108^{🇯🇵 IIJ-AS203.180.0.0/16 IIJ IPv4 BLOCK ( AS2497 )}
			PTR	`s017.d-53.org`
NS	`ns017-p3f9sk5npcu30u1r.p.d-53.org`
		A	2001:240:bb81::29:108^{🇯🇵 IIJ-AS2001:240::/32 IIJ IPv6 BLOCK ( AS2497 )}
			PTR	`s017.d-53.net`
		A	210.138.20.108^{🇯🇵 IIJ-AS210.138.0.0/16 IIJ IPv4 BLOCK ( AS2497 )}
			PTR	`s017.d-53.net`
MX	`mx.securemx.jp` ⭐
		A	210.130.202.92^{🇯🇵 IIJ-AS210.130.0.0/16 IIJ IPv4 BLOCK ( AS2497 )}
			PTR	`mx180b.securemx.jp`
		A	210.130.202.93^{🇯🇵 IIJ-AS210.130.0.0/16 IIJ IPv4 BLOCK ( AS2497 )}
			PTR	`mx114b.securemx.jp`
		A	210.130.202.96^{🇯🇵 IIJ-AS210.130.0.0/16 IIJ IPv4 BLOCK ( AS2497 )}
			PTR	`mx114a.securemx.jp`
		A	210.130.202.99^{🇯🇵 IIJ-AS210.130.0.0/16 IIJ IPv4 BLOCK ( AS2497 )}
			PTR	`mx180a.securemx.jp`
TXT	`v=spf1 include:spf.securemx.jp include:_spf.google.com ~all`
TXT	`google-site-verification=Mebx_P2kb8P0FBWk_VXUlLAROIPi3qpzJbNmWVQg6ro`
SOA	`ns000.d-53.net`dns-managers@iij.ad.jp serial=370

`com`

	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.net`nstld@verisign-grs.com serial=1784819292

Subdomains

swg-proxy.itcom21.com

ns.itcom21.com

ns2.itcom21.com

Same first word

itcom21.com

DNS History

12 records (5 active, 7 former)

○NSdns-b.iij.ad.jp2015-07-20 → 2016-11-30 · 5 obs

○ 2007-11-06 08:39:26
● 2015-07-20 23:05:52
● 2016-11-30 02:50:46
○ 2026-03-07 22:22:10
○ 2026-07-23 15:12:40

○NSdns-c.iij.ad.jp2015-07-20 → 2016-11-30 · 5 obs

○ 2007-11-06 08:39:26
● 2015-07-20 23:05:52
● 2016-11-30 02:50:46
○ 2026-03-07 22:22:10
○ 2026-07-23 15:12:40

○NSns.itcom21.com2007-11-06 → 2007-11-06 · 3 obs

● 2007-11-06 08:39:26
○ 2015-07-20 23:05:52
○ 2026-07-23 15:12:40

●NSns000.d-53.net2026-03-07 → 2026-07-23 · 3 obs

○ 2016-11-30 02:50:46
● 2026-03-07 22:22:10
● 2026-07-23 15:12:40

●NSns017-p3f9sk5npcu30u1r.p.d-53.info2026-03-07 → 2026-07-23 · 3 obs

○ 2016-11-30 02:50:46
● 2026-03-07 22:22:10
● 2026-07-23 15:12:40

●NSns017-p3f9sk5npcu30u1r.p.d-53.jp2026-03-07 → 2026-07-23 · 3 obs

○ 2016-11-30 02:50:46
● 2026-03-07 22:22:10
● 2026-07-23 15:12:40

●NSns017-p3f9sk5npcu30u1r.p.d-53.org2026-03-07 → 2026-07-23 · 3 obs

○ 2016-11-30 02:50:46
● 2026-03-07 22:22:10
● 2026-07-23 15:12:40

○NSns2.itcom21.com2007-11-06 → 2007-11-06 · 3 obs

● 2007-11-06 08:39:26
○ 2015-07-20 23:05:52
○ 2026-07-23 15:12:40

○NSsdi01.h-ix.jp2007-11-06 → 2007-11-06 · 3 obs

● 2007-11-06 08:39:26
○ 2015-07-20 23:05:52
○ 2026-07-23 15:12:40

●MXmx.securemx.jp2015-07-20 → 2026-07-23 · 3 obs

○ 2007-11-06 08:39:26
● 2015-07-20 23:05:52
● 2026-07-23 15:12:40

○MXns.itcom21.com2007-11-06 → 2007-11-06 · 3 obs

● 2007-11-06 08:39:26
○ 2015-07-20 23:05:52
○ 2026-07-23 15:12:40

○MXns2.itcom21.com2007-11-06 → 2007-11-06 · 3 obs

● 2007-11-06 08:39:26
○ 2015-07-20 23:05:52
○ 2026-07-23 15:12:40

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
itcom21.com	ns017-p3f9sk5npcu30u1r.p.d-53.info, ns017-p3f9sk5npcu30u1r.p.d-53.jp, ns017-p3f9sk5npcu30u1r.p.d-53.org	-

✅ Authoritative Response

Server:202.32.219.48

NS records: ns017-p3f9sk5npcu30u1r.p.d-53.info, ns017-p3f9sk5npcu30u1r.p.d-53.jp, ns017-p3f9sk5npcu30u1r.p.d-53.org

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1308ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	3	`ns017-p3f9sk5npcu30u1r.p.d-53.info, ns017-p3f9sk5npcu30u1r.p.d-53.jp...`
MX	1	`mx.securemx.jp (pri: 600)`
TXT	2	`v=spf1 include:spf.securemx.jp include:_, google-site-verification=Mebx_P2kb8P0FBW`
SOA	1	`ns000.d-53.net dns-managers.iij.ad.jp`

Analysis

Hierarchy

The domain itcom21.com is parent to swg-proxy.itcom21.com, ns.itcom21.com and ns2.itcom21.com.

Name Servers

itcom21.com has four authoritative name servers: ns000.d-53.net, ns017-p3f9sk5npcu30u1r.p.d-53.info, ns017-p3f9sk5npcu30u1r.p.d-53.jp and ns017-p3f9sk5npcu30u1r.p.d-53.org.

At least some of itcom21.com's name servers are shared with other domains, for example grasphere.com, gakkai-web.net, 48a.222.15.211.in-addr.arpa and two more.

These name servers tend to co-occur with dns-b.iij.ad.jp, dns-c.iij.ad.jp, rev.iij-dns.jp and 6 other name servers in the same DNS delegations.

The hostnames ns017-p3f9sk5npcu30u1r.p.d-53.info, ns017-p3f9sk5npcu30u1r.p.d-53.jp and ns017-p3f9sk5npcu30u1r.p.d-53.org each direct to two IP addresses — ns017-p3f9sk5npcu30u1r.p.d-53.info to 202.32.219.48 and 2001:240:bb81::28:48, ns017-p3f9sk5npcu30u1r.p.d-53.jp to 203.180.146.108 and 2001:240:bb81::29:1108, and ns017-p3f9sk5npcu30u1r.p.d-53.org to 210.138.20.108 and 2001:240:bb81::29:108.

Mail Servers

itcom21.com has one mail server: mx.securemx.jp.

itcom21.com shares the same mail server setup as other domains, including bzcml01.biznet.co.jp, atomix.co.jp, hcc.co.jp and two others.

itcom21.com shares mail servers — at least in part — with other domains, including aion-kk.co.jp, kohwa.biz, cherry-c.co.jp and two others.

These mail servers are frequently seen alongside the mail servers mx6.securemx.jp.

mx.securemx.jp resolves to four IP addresses: 210.130.202.92, 210.130.202.93, 210.130.202.96 and 210.130.202.99.