`contactswitch.com.tw`

DNSSEC	⚠️ Not signed
A	210.71.175.105^{🇹🇼 HiNet210.71.128.0/17 (HiNet) Chunghwa Telecom Co., Ltd.}
		PTR	`contactswitch.com.tw`
		PTR	`mail.contactswitch.com.tw`
		PTR	`wms5d806a.contactswitch.com.tw`
NS	`router.contactswitch.com.tw` ⭐ ⚠️ Not in parent delegation
		A	210.71.175.105^{🇹🇼 HiNet210.71.128.0/17 (HiNet) Chunghwa Telecom Co., Ltd.}
			PTR	`contactswitch.com.tw`
			PTR	`mail.contactswitch.com.tw`
			PTR	`wms5d806a.contactswitch.com.tw`
NS	`contactswitch.com.tw` ⚠️ Not in zone NS records
		A	210.71.175.105^{🇹🇼 HiNet210.71.128.0/17 (HiNet) Chunghwa Telecom Co., Ltd.}
			PTR	`contactswitch.com.tw`
			PTR	`mail.contactswitch.com.tw`
			PTR	`wms5d806a.contactswitch.com.tw`
NS	`wms5d806a.contactswitch.com.tw` ⚠️ Not in zone NS records
		A	210.71.175.105^{🇹🇼 HiNet210.71.128.0/17 (HiNet) Chunghwa Telecom Co., Ltd.}
			PTR	`contactswitch.com.tw`
			PTR	`mail.contactswitch.com.tw`
			PTR	`wms5d806a.contactswitch.com.tw`
MX	`contactswitch.com.tw` ⭐
		A	210.71.175.105^{🇹🇼 HiNet210.71.128.0/17 (HiNet) Chunghwa Telecom Co., Ltd.}
			PTR	`contactswitch.com.tw`
			PTR	`mail.contactswitch.com.tw`
			PTR	`wms5d806a.contactswitch.com.tw`
TXT	`v=spf1 ip4:210.71.175.105/32 -all`
SOA	`router.contactswitch.com.tw`root@contactswitch.com.tw 2001-01-01 #1

`com.tw`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.twnic.net.tw` ⭐
	NS	`anytld.apnic.net`
	NS	`b.twnic.net.tw`
	NS	`c.twnic.net.tw`
	NS	`d.twnic.net.tw`
	NS	`e.twnic.net.tw`
	NS	`f.twnic.net.tw`
	NS	`g.twnic.net.tw`
	NS	`h.dns.tw`
	NS	`h.twnic.net.tw`
	SOA	`a.twnic.net.tw`snw@twnic.net.tw serial=2006388544

WOT: SAFE (58/100)

PTR for

105.175.71.210.in-addr.arpa

NS for

contactswitch.com.tw

MX for

contactswitch.com.tw

Subdomains

router.contactswitch.com.tw

mail.contactswitch.com.tw

wms5d806a.contactswitch.com.tw

Same first word

contactswitch.com

contactswitch.com.tw

DNS History

7 records (5 active, 2 former)

●NScontactswitch.com.tw2026-05-05 → 2026-08-03 · 3 obs

○ 2016-11-20 19:05:32
● 2026-05-05 07:13:02
● 2026-08-03 19:45:24

○NSdns2.seven.com.tw2015-05-26 → 2016-11-20 · 4 obs

● 2015-05-26 04:34:36
● 2016-11-20 19:05:32
○ 2026-05-05 07:13:02
○ 2026-08-03 19:45:24

●NSrouter.contactswitch.com.tw2026-05-05 → 2026-08-03 · 3 obs

○ 2016-11-20 19:05:32
● 2026-05-05 07:13:02
● 2026-08-03 19:45:24

●NSwms5d806a.contactswitch.com.tw2026-05-05 → 2026-08-03 · 3 obs

○ 2016-11-20 19:05:32
● 2026-05-05 07:13:02
● 2026-08-03 19:45:24

●MXcontactswitch.com.tw2015-05-26 → 2026-08-03 · 2 obs

● 2015-05-26 04:34:36
● 2026-08-03 19:45:24

○A210.71.175.1042015-05-26 → 2016-11-20 · 4 obs

● 2015-05-26 04:34:36
● 2016-11-20 19:05:32
○ 2026-05-05 07:13:02
○ 2026-08-03 19:45:24

●A210.71.175.1052026-05-05 → 2026-08-03 · 3 obs

○ 2016-11-20 19:05:32
● 2026-05-05 07:13:02
● 2026-08-03 19:45:24

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
tw	a.dns.tw, b.dns.tw, c.dns.tw, d.dns.tw...	16 records
contactswitch.com.tw	wms5d806a.contactswitch.com.tw, contactswitch.com.tw	2 records

✅ Authoritative Response

Server:210.71.175.105

NS records: wms5d806a.contactswitch.com.tw, contactswitch.com.tw

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for contactswitch.com.tw (unsigned zone)

⏱️ Timing

Total: 1070ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`210.71.175.105`
NS	1	`router.contactswitch.com.tw`
MX	1	`contactswitch.com.tw (pri: 1)`
TXT	1	`v=spf1 ip4:210.71.175.105/32 -all`
SOA	1	`router.contactswitch.com.tw root.contact`

📌 Glue Records Collected

Total: 18

In-bailiwick: 16 (a.dns.tw, a.dns.tw, b.dns.tw...)

Out-of-bailiwick: 2 (anytld.apnic.net, anytld.apnic.net)

Analysis

Hierarchy

router.contactswitch.com.tw, mail.contactswitch.com.tw and wms5d806a.contactswitch.com.tw each fall under the parent domain contactswitch.com.tw.

Name Server Role

contactswitch.com.tw acts as a name server for contactswitch.com.tw, meaning it is self-referentially delegated.

router.contactswitch.com.tw, wms5d806a.contactswitch.com.tw and contactswitch.com.tw regularly act as name servers together.

Mail Server Role

contactswitch.com.tw is listed as a mail server for itself.

IP Addresses

contactswitch.com.tw resolves to one IP address: 210.71.175.105.

contactswitch.com.tw shares its IP numbers with other host names like mail.contactswitch.com.tw, wms5d806a.contactswitch.com.tw and router.contactswitch.com.tw.

Name Servers

Authority for contactswitch.com.tw is delegated across three name servers: contactswitch.com.tw, router.contactswitch.com.tw and wms5d806a.contactswitch.com.tw.

All three — contactswitch.com.tw, router.contactswitch.com.tw and wms5d806a.contactswitch.com.tw — point to 210.71.175.105 as their single IP address.

The host names contactswitch.com.tw, router.contactswitch.com.tw and wms5d806a.contactswitch.com.tw each resolve to 210.71.175.105.

Mail Servers

Mail for contactswitch.com.tw is handled by one mail server — contactswitch.com.tw.

contactswitch.com.tw - robtex.com