`rctdo.com`

DNSSEC	⚠️ Not signed
A	220.229.238.25^{🇹🇼 NCIC-TW220.229.238.0/24 New Century InfoComm Tech Co., Ltd.}
		PTR	`sp238025.goodon.com.tw`
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	`rctdo.com` ⭐
		A	220.229.238.25^{🇹🇼 NCIC-TW220.229.238.0/24 New Century InfoComm Tech Co., Ltd.}
			PTR	`sp238025.goodon.com.tw`
MX	`www.rctdo.com`⁽¹⁴⁾
		A	220.229.238.25^{🇹🇼 NCIC-TW220.229.238.0/24 New Century InfoComm Tech Co., Ltd.}
			PTR	`sp238025.goodon.com.tw`
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=1774425722

📈 Tranco rank: #694,438

MX for

rctdo.com

Same first word

rctdo.com

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DNS History

8 records (8 active, 0 former)

●NSdns1.f1.com.tw2026-03-12 → 2026-03-25 · 2 obs

● 2026-03-12 07:48:36
● 2026-03-25 08:08:38

●NSdns2.f1.com.tw2026-03-12 → 2026-03-25 · 2 obs

● 2026-03-12 07:48:36
● 2026-03-25 08:08:38

●NSns1.icstock.com.tw2026-03-12 → 2026-03-25 · 2 obs

● 2026-03-12 07:48:36
● 2026-03-25 08:08:38

●NSns2.icstock.com.tw2026-03-12 → 2026-03-25 · 2 obs

● 2026-03-12 07:48:36
● 2026-03-25 08:08:38

●NSsp234.f1.com.tw2026-03-12 → 2026-03-25 · 2 obs

● 2026-03-12 07:48:36
● 2026-03-25 08:08:38

●MXrctdo.com2026-03-12 → 2026-03-25 · 2 obs

● 2026-03-12 07:48:36
● 2026-03-25 08:08:38

●MXwww.rctdo.com2026-03-12 → 2026-03-25 · 2 obs

● 2026-03-12 07:48:36
● 2026-03-25 08:08:38

●A220.229.238.252026-03-12 → 2026-03-25 · 2 obs

● 2026-03-12 07:48:36
● 2026-03-25 08:08:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	d.gtld-servers.net, m.gtld-servers.net, f.gtld-servers.net, g.gtld-servers.net...	-
rctdo.com	ns1.icstock.com.tw, ns2.icstock.com.tw, sp234.f1.com.tw	-

✅ Authoritative Response

Server:218.32.213.234

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rctdo.com (unsigned zone)

⏱️ Timing

Total: 1219ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`220.229.238.25`
NS	2	`dns2.f1.com.tw, dns1.f1.com.tw`
MX	2	`www.rctdo.com (pri: 14), rctdo.com (pri: 10)`
SOA	1	`dns1.f1.com.tw ohgo.ms23.hinet.net`

Analysis

Mail Server Role

rctdo.com serves as a mail server for rctdo.com.

www.rctdo.com commonly serves as a mail server together with rctdo.com.

IP Addresses

rctdo.com points to a single IP: 220.229.238.25.

Other host names, for instance www.p735.com, p735.com, www.o710.com, sp238025.goodon.com.tw and o710.com share IP numbers with rctdo.com.

Name Servers

rctdo.com is delegated 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.

rctdo.com at least partially shares its name servers with other domains, for instance ck9797.com, twroomasia.info, uup79.com, uuf82.com and 387(0x736578).com.