`profchristophergoh.com.sg`

DNSSEC	⚠️ Not signed
A	2606:4700:3036::6815:322b^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::ac43:c8bd^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.50.43^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.200.189^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`bayan.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b48^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bayan.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c148^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`bayan.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2148^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`bayan.ns.cloudflare.com`
		A	108.162.193.72^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bayan.ns.cloudflare.com`
		A	172.64.33.72^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bayan.ns.cloudflare.com`
		A	173.245.59.72^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bayan.ns.cloudflare.com`
NS	`sofia.ns.cloudflare.com`
		A	2606:4700:50::adf5:3adf^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sofia.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0df^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`sofia.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20df^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`sofia.ns.cloudflare.com`
		A	108.162.192.223^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sofia.ns.cloudflare.com`
		A	172.64.32.223^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sofia.ns.cloudflare.com`
		A	173.245.58.223^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sofia.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.50.43, 172.67.200.189
		IPv6 hints	2606:4700:3036::6815:322b, 2606:4700:3036::ac43:c8bd
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=206, name=cloudflare-ech.com
SOA	`bayan.ns.cloudflare.com`dns@cloudflare.com serial=2400413659

`com.sg`

	DNSSEC	⚠️ Not signed
	NS	`ds.sgnic.sg` ⭐
	NS	`dsany2.sgnic.sg` ⚠️ Not in parent delegation
	NS	`dsany3.sgnic.sg` ⚠️ Not in parent delegation
	NS	`dsany4.sgnic.sg` ⚠️ Not in parent delegation
	NS	`pch.sgzones.sg` ⚠️ Not in parent delegation
	SOA	`ds.sgnic.sg`dna@sgnic.sg serial=2605092300

🔒 HSTS Preload (+subdomains)

Same first word

profchristophergoh.com.sg

DNS History

9 records (6 active, 3 former)

●NSbayan.ns.cloudflare.com2026-02-27 → 2026-05-09 · 3 obs

○ 2019-01-07 02:05:56
● 2026-02-27 07:21:36
● 2026-05-09 23:22:34

○NSns1.webvisions.com2019-01-07 → 2019-01-07 · 3 obs

● 2019-01-07 02:05:56
○ 2026-02-27 07:21:36
○ 2026-05-09 23:22:34

○NSns2.webvisions.com2019-01-07 → 2019-01-07 · 3 obs

● 2019-01-07 02:05:56
○ 2026-02-27 07:21:36
○ 2026-05-09 23:22:34

●NSsofia.ns.cloudflare.com2026-02-27 → 2026-05-09 · 3 obs

○ 2019-01-07 02:05:56
● 2026-02-27 07:21:36
● 2026-05-09 23:22:34

○A101.100.216.932019-01-07 → 2019-01-07 · 3 obs

● 2019-01-07 02:05:56
○ 2026-02-27 07:21:36
○ 2026-05-09 23:22:34

●A104.21.50.432026-02-27 → 2026-05-09 · 3 obs

○ 2019-01-07 02:05:56
● 2026-02-27 07:21:36
● 2026-05-09 23:22:34

●A172.67.200.1892026-02-27 → 2026-05-09 · 3 obs

○ 2019-01-07 02:05:56
● 2026-02-27 07:21:36
● 2026-05-09 23:22:34

●A2606:4700:3036::6815:322b2026-02-27 → 2026-05-09 · 3 obs

○ 2019-01-07 02:05:56
● 2026-02-27 07:21:36
● 2026-05-09 23:22:34

●A2606:4700:3036::ac43:c8bd2026-02-27 → 2026-05-09 · 3 obs

○ 2019-01-07 02:05:56
● 2026-02-27 07:21:36
● 2026-05-09 23:22:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
sg	dsany3.sgnic.sg, dsany2.sgnic.sg, dsany4.sgnic.sg, pch.sgzones.sg...	10 records
profchristophergoh.com.sg	bayan.ns.cloudflare.com, sofia.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.192.223

NS records: bayan.ns.cloudflare.com, sofia.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for profchristophergoh.com.sg (unsigned zone)

⏱️ Timing

Total: 949ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.200.189, 104.21.50.43`
AAAA	2	`2606:4700:3036::ac43:c8bd, 2606:4700:3036::6815:322b`
NS	2	`bayan.ns.cloudflare.com, sofia.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`bayan.ns.cloudflare.com dns.cloudflare.c`

📌 Glue Records Collected

Total: 10

In-bailiwick: 8 (dsany4.sgnic.sg, dsany3.sgnic.sg, dsany2.sgnic.sg...)

Out-of-bailiwick: 2 (ns4.apnic.net, ns4.apnic.net)

Analysis

IP Addresses

profchristophergoh.com.sg maps to four IP numbers: 2606:4700:3036::6815:322b, 2606:4700:3036::ac43:c8bd, 104.21.50.43 and 172.67.200.189.

Other host names, for instance hoarsergrid.digital, nxwytx.com, blick.cc, cyber-risk.co.uk and help-verifycenter.com share IP numbers with profchristophergoh.com.sg.

Name Servers

Two name servers bayan.ns.cloudflare.com and sofia.ns.cloudflare.com handle delegation for profchristophergoh.com.sg.

profchristophergoh.com.sg uses the same name server setup as other domains, for example nasushiobara.net, acttankwheel.com, liversurgerycentre.com, omegalia.net and leslielam.com.sg.

profchristophergoh.com.sg partially shares name servers with other domains; examples include carolinahears.com, nkw.ac.th, ace96au.com, recvolt.com and hcvape.com.

These name servers are commonly used with donna.ns.cloudflare.com, dilbert.ns.cloudflare.com and leah.ns.cloudflare.com.

Host names with six IP numbers: bayan.ns.cloudflare.com points to: 2606:4700:58::adf5:3b48, 2803:f800:50::6ca2:c148, 2a06:98c1:50::ac40:2148, 108.162.193.72, 172.64.33.72 and 173.245.59.72; sofia.ns.cloudflare.com points to: 2606:4700:50::adf5:3adf, 2803:f800:50::6ca2:c0df, 2a06:98c1:50::ac40:20df, 108.162.192.223, 172.64.32.223 and 173.245.58.223.

profchristophergoh.com.sg - robtex.com