`rctdob.com`

DNSSEC	⚠️ Not signed
A	220.228.6.9^{🇹🇼 NCIC-TW220.228.0.0/19 New Century InfoComm Tech Co., Ltd.}
NS	`dns1.f1.com.tw` ⭐ ⚠️ Not in parent delegation
		A	218.32.213.234^{🇹🇼 NCIC-TW218.32.192.0/19 New Century InfoComm Tech Co., Ltd.}
			PTR	`sp234.f1.com.tw`
NS	`dns2.f1.com.tw` ⚠️ Not in parent delegation
		A	220.228.6.17^{🇹🇼 NCIC-TW220.228.0.0/19 New Century InfoComm Tech Co., Ltd.}
NS	`ns1.icstock.com.tw` ⚠️ Not in zone NS records
		A	218.32.213.228^{🇹🇼 NCIC-TW218.32.192.0/19 New Century InfoComm Tech Co., Ltd.}
			PTR	`sp228.f1.com.tw`
NS	`ns2.icstock.com.tw` ⚠️ Not in zone NS records
		A	218.32.210.72^{🇹🇼 NCIC-TW218.32.210.0/24 New Century InfoComm Tech Co., Ltd.}
			PTR	`sp72.f1.com.tw`
NS	`sp234.f1.com.tw` ⚠️ Not in zone NS records
		A	218.32.213.234^{🇹🇼 NCIC-TW218.32.192.0/19 New Century InfoComm Tech Co., Ltd.}
			PTR	`sp234.f1.com.tw`
MX	`rctdob.com` ⭐
		A	220.228.6.9^{🇹🇼 NCIC-TW220.228.0.0/19 New Century InfoComm Tech Co., Ltd.}
MX	`www.rctdob.com`⁽¹⁴⁾
		A	220.228.6.9^{🇹🇼 NCIC-TW220.228.0.0/19 New Century InfoComm Tech Co., Ltd.}
SOA	`dns1.f1.com.tw`ohgo@ms23.hinet.net 2000-11-01 #8

`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=1774376642

MX for

rctdob.com

Same first word

rctdob.com

Similar names

cbrdot.cn

DNS History

8 records (8 active, 0 former)

●NSdns1.f1.com.tw2026-02-20 → 2026-03-24 · 2 obs

● 2026-02-20 08:09:48
● 2026-03-24 18:33:50

●NSdns2.f1.com.tw2026-02-20 → 2026-03-24 · 2 obs

● 2026-02-20 08:09:48
● 2026-03-24 18:33:50

●NSns1.icstock.com.tw2026-02-20 → 2026-03-24 · 2 obs

● 2026-02-20 08:09:48
● 2026-03-24 18:33:50

●NSns2.icstock.com.tw2026-02-20 → 2026-03-24 · 2 obs

● 2026-02-20 08:09:48
● 2026-03-24 18:33:50

●NSsp234.f1.com.tw2026-02-20 → 2026-03-24 · 2 obs

● 2026-02-20 08:09:48
● 2026-03-24 18:33:50

●MXrctdob.com2026-02-20 → 2026-03-24 · 2 obs

● 2026-02-20 08:09:48
● 2026-03-24 18:33:50

●MXwww.rctdob.com2026-02-20 → 2026-03-24 · 2 obs

● 2026-02-20 08:09:48
● 2026-03-24 18:33:50

●A220.228.6.92026-02-20 → 2026-03-24 · 2 obs

● 2026-02-20 08:09:48
● 2026-03-24 18:33:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
rctdob.com	ns1.icstock.com.tw, ns2.icstock.com.tw, sp234.f1.com.tw	-

✅ Authoritative Response

Server:218.32.213.228

NS records: ns1.icstock.com.tw, ns2.icstock.com.tw, sp234.f1.com.tw

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rctdob.com (unsigned zone)

⏱️ Timing

Total: 1192ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`220.228.6.9`
NS	2	`dns1.f1.com.tw, dns2.f1.com.tw`
MX	2	`www.rctdob.com (pri: 14), rctdob.com (pri: 10)`
SOA	1	`dns1.f1.com.tw ohgo.ms23.hinet.net`

Analysis

Mail Server Role

The mail server for rctdob.com is rctdob.com.

With rctdob.com, www.rctdob.com is commonly used as a mail server.

IP Addresses

rctdob.com maps to IP address 220.228.6.9.

Other host names, for instance www.ke67u.com, syk0050.com, yoyop51.com, 18jkk.com and www.uy23r.com share IP numbers with rctdob.com.

Name Servers

rctdob.com delegates to five name servers: dns1.f1.com.tw, dns2.f1.com.tw, sp234.f1.com.tw, ns1.icstock.com.tw and ns2.icstock.com.tw.

rctdob.com at least partially shares name servers with other domains such as sn257.com, 18x-star.com, 66-hot.com, am68y.com and uthome-811.com.