`rctdoa.com`

DNSSEC	⚠️ Not signed
A	220.228.6.71^{🇹🇼 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	`rctdoa.com` ⭐
		A	220.228.6.71^{🇹🇼 NCIC-TW220.228.0.0/19 New Century InfoComm Tech Co., Ltd.}
MX	`www.rctdoa.com`⁽¹⁴⁾
		A	220.228.6.71^{🇹🇼 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=1778874476

MX for

rctdoa.com

Same first word

rctdoa.com

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DNS History

8 records (8 active, 0 former)

●NSdns1.f1.com.tw2026-05-09 → 2026-05-15 · 2 obs

● 2026-05-09 19:33:00
● 2026-05-15 19:48:56

●NSdns2.f1.com.tw2026-05-09 → 2026-05-15 · 2 obs

● 2026-05-09 19:33:00
● 2026-05-15 19:48:56

●NSns1.icstock.com.tw2026-05-09 → 2026-05-15 · 2 obs

● 2026-05-09 19:33:00
● 2026-05-15 19:48:56

●NSns2.icstock.com.tw2026-05-09 → 2026-05-15 · 2 obs

● 2026-05-09 19:33:00
● 2026-05-15 19:48:56

●NSsp234.f1.com.tw2026-05-09 → 2026-05-15 · 2 obs

● 2026-05-09 19:33:00
● 2026-05-15 19:48:56

●MXrctdoa.com2026-05-09 → 2026-05-15 · 2 obs

● 2026-05-09 19:33:00
● 2026-05-15 19:48:56

●MXwww.rctdoa.com2026-05-09 → 2026-05-15 · 2 obs

● 2026-05-09 19:33:00
● 2026-05-15 19:48:56

●A220.228.6.712026-05-09 → 2026-05-15 · 2 obs

● 2026-05-09 19:33:00
● 2026-05-15 19:48:56

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
rctdoa.com	ns1.icstock.com.tw, ns2.icstock.com.tw, sp234.f1.com.tw	-

✅ Authoritative Response

Server:218.32.210.72

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rctdoa.com (unsigned zone)

⏱️ Timing

Total: 1388ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`220.228.6.71`
NS	2	`dns1.f1.com.tw, dns2.f1.com.tw`
MX	2	`rctdoa.com (pri: 10), www.rctdoa.com (pri: 14)`
SOA	1	`dns1.f1.com.tw ohgo.ms23.hinet.net`

Analysis

Mail Server Role

rctdoa.com serves as the mail server for rctdoa.com.

For mail handling, www.rctdoa.com serves as a mail server together with rctdoa.com.

IP Addresses

rctdoa.com points to a single IP number: 220.228.6.71.

Other host names, for instance www.btf01.com, www.w317.com, www.x845.com, w5y2.com and www.7vvc.com share IP numbers with rctdoa.com.

Name Servers

rctdoa.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.

rctdoa.com at least partially shares name servers with other domains, for instance ejlog.com, dudu136.com, 0401-av.com, ke53e.com and 616kiss.com.