`captions.app`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::ac43:cb32^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:451e^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.69.30^{Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.203.50^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`dara.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a5b^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dara.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c05b^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`dara.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:205b^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`dara.ns.cloudflare.com`
		A	108.162.192.91^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dara.ns.cloudflare.com`
		A	172.64.32.91^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dara.ns.cloudflare.com`
		A	173.245.58.91^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dara.ns.cloudflare.com`
NS	`george.ns.cloudflare.com`
		A	2606:4700:58::adf5:3ba7^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`george.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1a7^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`george.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21a7^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`george.ns.cloudflare.com`
		A	108.162.193.167^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`george.ns.cloudflare.com`
		A	172.64.33.167^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`george.ns.cloudflare.com`
		A	173.245.59.167^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`george.ns.cloudflare.com`
MX	`in1-smtp.messagingengine.com` ⭐
		A	103.168.172.216^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-01.messagingengine.com`
		A	103.168.172.217^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-02.messagingengine.com`
		A	103.168.172.218^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-03.messagingengine.com`
		A	103.168.172.219^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-04.messagingengine.com`
		A	103.168.172.220^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-05.messagingengine.com`
		A	103.168.172.221^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-06.messagingengine.com`
		A	103.168.172.222^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-07.messagingengine.com`
		A	103.168.172.223^{🇺🇸 TELX-AS151847103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-08.messagingengine.com`
MX	`in2-smtp.messagingengine.com`⁽²⁰⁾
		A	202.12.124.216^{TELX-AS151847202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-01.messagingengine.com`
		A	202.12.124.217^{TELX-AS151847202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-02.messagingengine.com`
		A	202.12.124.218^{TELX-AS151847202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-03.messagingengine.com`
		A	202.12.124.219^{TELX-AS151847202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-04.messagingengine.com`
TXT	`mailerlite-domain-verification=640a272d35915a0c0ba3315413a8d40c6139c556`
TXT	`v=spf1 include:spf.messagingengine.com a mx include:_spf.mlsend.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.69.30, 172.67.203.50
		IPv6 hints	2606:4700:3030::ac43:cb32, 2606:4700:3035::6815:451e
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=87, name=cloudflare-ech.com
SOA	`dara.ns.cloudflare.com`dns@cloudflare.com serial=2409080990

`app`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns-tld1.charlestonroadregistry.com` ⭐
	NS	`ns-tld2.charlestonroadregistry.com`
	NS	`ns-tld3.charlestonroadregistry.com`
	NS	`ns-tld4.charlestonroadregistry.com`
	NS	`ns-tld5.charlestonroadregistry.com`
	SOA	`ns-tld1.charlestonroadregistry.com`cloud-dns-hostmaster@google.com serial=101427

🔒 HSTS Preload (+subdomains)

Same first word

captions.net

captions.com

captions.app

captions.us

captions.ai

captions.eu

captions.nl

captions.biz

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DNS History

8 records (8 active, 0 former)

●NSdara.ns.cloudflare.com2026-07-10 → 2026-08-04 · 2 obs

● 2026-07-10 01:06:44
● 2026-08-04 01:09:52

●NSgeorge.ns.cloudflare.com2026-07-10 → 2026-08-04 · 2 obs

● 2026-07-10 01:06:44
● 2026-08-04 01:09:52

●MXin1-smtp.messagingengine.com2026-07-10 → 2026-08-04 · 2 obs

● 2026-07-10 01:06:44
● 2026-08-04 01:09:52

●MXin2-smtp.messagingengine.com2026-07-10 → 2026-08-04 · 2 obs

● 2026-07-10 01:06:44
● 2026-08-04 01:09:52

●A104.21.69.302026-07-10 → 2026-08-04 · 2 obs

● 2026-07-10 01:06:44
● 2026-08-04 01:09:52

●A172.67.203.502026-07-10 → 2026-08-04 · 2 obs

● 2026-07-10 01:06:44
● 2026-08-04 01:09:52

●A2606:4700:3030::ac43:cb322026-07-10 → 2026-08-04 · 2 obs

● 2026-07-10 01:06:44
● 2026-08-04 01:09:52

●A2606:4700:3035::6815:451e2026-07-10 → 2026-08-04 · 2 obs

● 2026-07-10 01:06:44
● 2026-08-04 01:09:52

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
app	ns-tld1.charlestonroadregistry.com, ns-tld5.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com...	-
captions.app	george.ns.cloudflare.com, dara.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.33.167

NS records: george.ns.cloudflare.com, dara.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for captions.app (unsigned zone)

⏱️ Timing

Total: 731ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.69.30, 172.67.203.50`
AAAA	2	`2606:4700:3035::6815:451e, 2606:4700:3030::ac43:cb32`
NS	2	`dara.ns.cloudflare.com, george.ns.cloudflare.com`
MX	2	`in1-smtp.messagingengine.com (pri: 10), in2-smtp.messagingengine.com (pri: 20)`
TXT	2	`mailerlite-domain-verification=640a272d3, v=spf1 include:spf.messagingengine.com a`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`dara.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

captions.app directs to four IP numbers, which are 104.21.69.30, 172.67.203.50, 2606:4700:3030::ac43:cb32 and 2606:4700:3035::6815:451e.

www.yivtsnnmutzkb.site, derimker.com, cpanel.tectotechnology.com and two other host names share IP numbers with captions.app.

Name Servers

captions.app is served by two delegated name servers, dara.ns.cloudflare.com and george.ns.cloudflare.com.

captions.app uses the same name servers as several other domains — among them rubberman.co.uk, euroyachts.com, abbey-removals-llandudno.co.uk and two more.

At least some of captions.app's name servers are shared with other domains, for example fieston.com.ar, 0398rxb.com, gamerplace.net and two more.

These name servers tend to be deployed in combination with the name servers coen.ns.cloudflare.com and walt.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

dara.ns.cloudflare.com carries IP addresses 108.162.192.91, 172.64.32.91 and 173.245.58.91, with 3 other addresses beyond those.

george.ns.cloudflare.com carries IP addresses 108.162.193.167, 172.64.33.167 and 173.245.59.167, with 3 other addresses beyond those.

Mail Servers

Mail for captions.app is handled by two mail servers — in1-smtp.messagingengine.com and in2-smtp.messagingengine.com.

captions.app uses an identical mail server configuration to several other domains — among them letmiko.com, alcpc47.com, rootservices.net and two more.

captions.app overlaps on mail servers with certain other domains, jakeneedham.com among them.

Hostnames that resolve to 8 IP addresses:

in1-smtp.messagingengine.com carries IP addresses 103.168.172.216, 103.168.172.217 and 103.168.172.218, with 5 other addresses beyond those.

Hosts that point to four IP numbers:

in2-smtp.messagingengine.com directs to 202.12.124.216, 202.12.124.217, 202.12.124.218 and 202.12.124.219.

captions.app - robtex.com

captions.app

app

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

Mail Servers

`captions.app`

`app`