readcalc.com - dns.ninja

`readcalc.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::6815:813^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::ac43:9cb3^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.8.19^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.156.179^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`chris.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b55^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`chris.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c155^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`chris.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2155^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`chris.ns.cloudflare.com`
		A	108.162.193.85^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`chris.ns.cloudflare.com`
		A	172.64.33.85^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`chris.ns.cloudflare.com`
		A	173.245.59.85^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`chris.ns.cloudflare.com`
NS	`leanna.ns.cloudflare.com`
		A	2606:4700:50::a29f:2697^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`leanna.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c297^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`leanna.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2297^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`leanna.ns.cloudflare.com`
		A	108.162.194.151^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`leanna.ns.cloudflare.com`
		A	162.159.38.151^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`leanna.ns.cloudflare.com`
		A	172.64.34.151^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`leanna.ns.cloudflare.com`
TXT	`google-site-verification=DoK4TZdSsBiT8vsW4m_Bdl7CiAMaEU2a943BFKxEuUc`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.8.19, 172.67.156.179
		IPv6 hints	2606:4700:3030::6815:813, 2606:4700:3036::ac43:9cb3
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=133, name=cloudflare-ech.com
SOA	`chris.ns.cloudflare.com`dns@cloudflare.com serial=2406697100

`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=1782574675

🔒 HSTS Preload (+subdomains)

Same first word

readcalc.com

Similar names

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caldecar.com

cacalder.com

lacecard.com

adleracc.com

clearcad.com

caelcard.com

lacerdac.ro

clearcad.com.br

cardecal.com

careclad.com

ccaldera.com

ceraclad.com

calcedar.com

clearcad.nl

DNS History

17 records (6 active, 11 former)

●NSchris.ns.cloudflare.com2026-06-05 → 2026-06-27 · 3 obs

○ 2016-03-20 17:04:56
● 2026-06-05 07:50:04
● 2026-06-27 15:40:44

●NSleanna.ns.cloudflare.com2026-06-05 → 2026-06-27 · 3 obs

○ 2016-03-20 17:04:56
● 2026-06-05 07:50:04
● 2026-06-27 15:40:44

○NSns1.unoeuro.com2015-05-17 → 2015-12-10 · 4 obs

● 2015-05-17 06:45:40
● 2015-12-10 16:29:58
○ 2016-03-20 17:04:56
○ 2026-06-27 15:40:44

○NSns2.unoeuro.com2015-05-17 → 2015-12-10 · 4 obs

● 2015-05-17 06:45:40
● 2015-12-10 16:29:58
○ 2016-03-20 17:04:56
○ 2026-06-27 15:40:44

○NSns3.unoeuro.com2015-05-17 → 2015-12-10 · 4 obs

● 2015-05-17 06:45:40
● 2015-12-10 16:29:58
○ 2016-03-20 17:04:56
○ 2026-06-27 15:40:44

○NSns4.unoeuro.com2015-05-17 → 2015-12-10 · 4 obs

● 2015-05-17 06:45:40
● 2015-12-10 16:29:58
○ 2016-03-20 17:04:56
○ 2026-06-27 15:40:44

○MXmail22.unoeuro.com2015-05-17 → 2015-10-10 · 4 obs

● 2015-05-17 06:45:40
● 2015-10-10 20:38:00
○ 2015-12-10 16:29:58
○ 2026-06-27 15:40:44

○MXmx.unoeuro.com2015-12-10 → 2015-12-10 · 4 obs

○ 2015-10-10 20:38:00
● 2015-12-10 16:29:58
○ 2016-03-20 17:04:56
○ 2026-06-27 15:40:44

●A104.21.8.192026-06-05 → 2026-06-27 · 5 obs

○ 2016-03-20 17:04:56
● 2026-06-05 07:50:04
○ 2026-06-19 21:44:24
● 2026-06-27 15:40:42
● 2026-06-27 15:40:44

●A172.67.156.1792026-06-05 → 2026-06-27 · 5 obs

○ 2016-03-20 17:04:56
● 2026-06-05 07:50:04
○ 2026-06-19 21:44:24
● 2026-06-27 15:40:42
● 2026-06-27 15:40:44

○A188.114.96.02026-06-19 → 2026-06-19 · 4 obs

○ 2026-06-05 07:50:04
● 2026-06-19 21:44:24
○ 2026-06-27 15:40:42
○ 2026-06-27 15:40:44

○A188.114.97.02026-06-19 → 2026-06-19 · 4 obs

○ 2026-06-05 07:50:04
● 2026-06-19 21:44:24
○ 2026-06-27 15:40:42
○ 2026-06-27 15:40:44

●A2606:4700:3030::6815:8132026-06-05 → 2026-06-27 · 5 obs

○ 2016-03-20 17:04:56
● 2026-06-05 07:50:04
○ 2026-06-19 21:44:24
● 2026-06-27 15:40:42
● 2026-06-27 15:40:44

●A2606:4700:3036::ac43:9cb32026-06-05 → 2026-06-27 · 5 obs

○ 2016-03-20 17:04:56
● 2026-06-05 07:50:04
○ 2026-06-19 21:44:24
● 2026-06-27 15:40:42
● 2026-06-27 15:40:44

○A2a06:98c1:3120::2026-06-19 → 2026-06-19 · 4 obs

○ 2026-06-05 07:50:04
● 2026-06-19 21:44:24
○ 2026-06-27 15:40:42
○ 2026-06-27 15:40:44

○A2a06:98c1:3121::2026-06-19 → 2026-06-19 · 4 obs

○ 2026-06-05 07:50:04
● 2026-06-19 21:44:24
○ 2026-06-27 15:40:42
○ 2026-06-27 15:40:44

○A94.231.103.312015-05-17 → 2015-12-10 · 4 obs

● 2015-05-17 06:45:40
● 2015-12-10 16:29:58
○ 2016-03-20 17:04:56
○ 2026-06-27 15:40:44

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	i.gtld-servers.net, b.gtld-servers.net, k.gtld-servers.net, j.gtld-servers.net...	-
readcalc.com	chris.ns.cloudflare.com, leanna.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.194.151

NS records: chris.ns.cloudflare.com, leanna.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for readcalc.com (unsigned zone)

⏱️ Timing

Total: 383ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.8.19, 172.67.156.179`
AAAA	2	`2606:4700:3030::6815:813, 2606:4700:3036::ac43:9cb3`
NS	2	`chris.ns.cloudflare.com, leanna.ns.cloudflare.com`
TXT	1	`google-site-verification=DoK4TZdSsBiT8vs`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`chris.ns.cloudflare.com dns.cloudflare.c`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (chris.ns.cloudflare.com, chris.ns.cloudflare.com, chris.ns.cloudflare.com...)

Analysis

IP Addresses

readcalc.com points to the four IP addresses 104.21.8.19, 172.67.156.179, 2606:4700:3030::6815:813 and 2606:4700:3036::ac43:9cb3.

Additional host names — jonathanslaughter.uk, seo4fun.com, eawb.ro and two others — share IP numbers with readcalc.com.

Name Servers

DNS delegation for readcalc.com points to two name servers: chris.ns.cloudflare.com and leanna.ns.cloudflare.com.

readcalc.com shares its name server setup with other domains, including mrworldgames.com, padify.net, turkeyclubmarina.net and two others.

The name servers of readcalc.com overlap at least partially with those of other domains — among them tarot.nu, comjra.top, danvoriquelu.com and two more.

These name servers are frequently paired with the name servers bradley.ns.cloudflare.com, brit.ns.cloudflare.com, mckenzie.ns.cloudflare.com and two others.

Host names with 6 IP numbers:

chris.ns.cloudflare.com has IP addresses 108.162.193.85, 172.64.33.85 and 173.245.59.85, plus 3 other.

leanna.ns.cloudflare.com has IP addresses 108.162.194.151, 162.159.38.151 and 172.64.34.151, plus 3 other.