`mastermap.courses`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::ac43:d2c4^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::6815:25aa^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.37.170^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.210.196^{🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`coleman.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2c40^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`coleman.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c340^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`coleman.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2340^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`coleman.ns.cloudflare.com`
		A	108.162.195.64^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`coleman.ns.cloudflare.com`
		A	162.159.44.64^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`coleman.ns.cloudflare.com`
		A	172.64.35.64^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`coleman.ns.cloudflare.com`
NS	`rita.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a8c^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rita.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c08c^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`rita.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:208c^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`rita.ns.cloudflare.com`
		A	108.162.192.140^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rita.ns.cloudflare.com`
		A	172.64.32.140^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rita.ns.cloudflare.com`
		A	173.245.58.140^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rita.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.37.170, 172.67.210.196
		IPv6 hints	2606:4700:3033::ac43:d2c4, 2606:4700:3036::6815:25aa
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=252, name=cloudflare-ech.com
SOA	`coleman.ns.cloudflare.com`dns@cloudflare.com serial=2403355836

`courses`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.nic.courses` ⭐
	NS	`b.nic.courses`
	NS	`c.nic.courses`
	NS	`x.nic.courses`
	NS	`y.nic.courses`
	NS	`z.nic.courses`
	SOA	`a.nic.courses`admin@tldns.godaddy serial=1778364833

⚠️ On DNS blocklist: tif

Same first word

mastermap.ch

mastermap.de

mastermap.net

mastermap.ru

mastermap.courses

mastermap.com

mastermap.co.nz

Similar names

DNS History

6 records (6 active, 0 former)

●NScoleman.ns.cloudflare.com2026-05-06 → 2026-05-10 · 2 obs

● 2026-05-06 22:26:10
● 2026-05-10 01:09:04

●NSrita.ns.cloudflare.com2026-05-06 → 2026-05-10 · 2 obs

● 2026-05-06 22:26:10
● 2026-05-10 01:09:04

●A104.21.37.1702026-05-06 → 2026-05-10 · 2 obs

● 2026-05-06 22:26:10
● 2026-05-10 01:09:04

●A172.67.210.1962026-05-06 → 2026-05-10 · 2 obs

● 2026-05-06 22:26:10
● 2026-05-10 01:09:04

●A2606:4700:3033::ac43:d2c42026-05-06 → 2026-05-10 · 2 obs

● 2026-05-06 22:26:10
● 2026-05-10 01:09:04

●A2606:4700:3036::6815:25aa2026-05-06 → 2026-05-10 · 2 obs

● 2026-05-06 22:26:10
● 2026-05-10 01:09:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
courses	x.nic.courses, c.nic.courses, a.nic.courses, b.nic.courses...	12 records
mastermap.courses	rita.ns.cloudflare.com, coleman.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.32.140

NS records: rita.ns.cloudflare.com, coleman.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mastermap.courses (unsigned zone)

⏱️ Timing

Total: 441ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.37.170, 172.67.210.196`
AAAA	2	`2606:4700:3033::ac43:d2c4, 2606:4700:3036::6815:25aa`
NS	2	`coleman.ns.cloudflare.com, rita.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`coleman.ns.cloudflare.com dns.cloudflare`

📌 Glue Records Collected

Total: 12

In-bailiwick: 12 (z.nic.courses, y.nic.courses, x.nic.courses...)

Analysis

IP Addresses

mastermap.courses maps to four IP numbers: 2606:4700:3033::ac43:d2c4, 2606:4700:3036::6815:25aa, 104.21.37.170 and 172.67.210.196.

Other host names, for instance atyr-ukyk.online, aa123aa123.com, pratikav.com.tr, therxcdn.xyz and bpiofficial.cc share IP numbers with mastermap.courses.

Name Servers

Two name servers coleman.ns.cloudflare.com and rita.ns.cloudflare.com handle delegation for mastermap.courses.

mastermap.courses uses the same name server setup as other domains, for example htshoecker.de, storixion.sbs, coslaya.com, auroravanta.icu and jaxxrestaurants.ro.

mastermap.courses partially shares name servers with other domains; examples include digipaper.ca, eximiustax.com, gentlehollowpath.top, pershingadvisorysolutions.com and marieamanda.com.

These name servers are often used with the name servers meadow.ns.cloudflare.com and veronica.ns.cloudflare.com.

Host names with six IP numbers: coleman.ns.cloudflare.com points to: 2606:4700:58::a29f:2c40, 2803:f800:50::6ca2:c340, 2a06:98c1:50::ac40:2340, 108.162.195.64, 162.159.44.64 and 172.64.35.64; rita.ns.cloudflare.com points to: 2606:4700:50::adf5:3a8c, 2803:f800:50::6ca2:c08c, 2a06:98c1:50::ac40:208c, 108.162.192.140, 172.64.32.140 and 173.245.58.140.

mastermap.courses - robtex.com