`mail.codelearn.cat`

CNAME	`smtp-relay.gmail.com`
DNSSEC	⚠️ Not signed
A	2607:f8b0:4004:c1f::1c^{🇺🇸 Google2607:f8b0:4004::/48}
		PTR	`pd-in-f28.1e100.net`
A	142.251.179.28^{🇺🇸 Google142.251.179.0/24}

`codelearn.cat`

	DNSSEC	⚠️ Not signed
	A	2a01:4f8:a0:11e8::2^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
	A	88.198.41.199^{🇩🇪 Hetzner88.198.0.0/16 HETZNER-RZ-NBG-BLK4}
	NS	`george.ns.cloudflare.com` ⭐
	NS	`olga.ns.cloudflare.com`
	MX	`aspmx.l.google.com` ⭐
	MX	`alt1.aspmx.l.google.com`⁽⁵⁾
	MX	`alt2.aspmx.l.google.com`⁽⁵⁾
	MX	`aspmx2.googlemail.com`⁽¹⁰⁾
	MX	`aspmx3.googlemail.com`⁽¹⁰⁾
	TXT	`google-site-verification=Jw1zL9fPlkjnCxWgul5QMJOBB-YscdyVTiXarCI7-oo`
	TXT	`v=spf1 mx ip4:188.40.142.211 ip4:5.9.118.77 ip4:88.198.41.199 ip4:46.4.13.211...`
	SOA	`george.ns.cloudflare.com`dns@cloudflare.com serial=2406226050

📈 Tranco rank: #773,530

Previously MX for

codelearn.com

codelearn.cat

Same first word

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DNS History

5 records (1 active, 4 former)

○A216.172.104.42015-06-12 → 2016-04-19 · 5 obs

● 2015-06-12 00:00:56
● 2015-10-20 11:58:02
○ 2016-02-03 22:25:20
● 2016-04-19 17:38:46
○ 2026-06-09 01:18:34

○A2a00:1450:400c:c01::1c2016-02-03 → 2016-02-03 · 4 obs

○ 2015-10-20 11:58:02
● 2016-02-03 22:25:20
○ 2016-04-19 17:38:46
○ 2026-06-09 01:18:34

○A74.125.195.282016-02-03 → 2016-02-03 · 4 obs

○ 2015-10-20 11:58:02
● 2016-02-03 22:25:20
○ 2016-04-19 17:38:46
○ 2026-06-09 01:18:34

○CNAMEgmail-smtp-relay.l.google.com2016-02-03 → 2016-02-03 · 3 obs

● 2016-02-03 22:25:20
○ 2016-04-19 17:38:46
○ 2026-06-09 01:18:34

●CNAMEsmtp-relay.gmail.com2016-02-03 → 2026-06-09 · 3 obs

● 2016-02-03 22:25:20
○ 2016-04-19 17:38:46
● 2026-06-09 01:18:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cat	cat.ns.nic.es, switch.nic.cat, nsc.nic.de, cat.pch.net...	10 records
codelearn.cat	olga.ns.cloudflare.com, george.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.33.167

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for codelearn.cat (unsigned zone)

⏱️ Timing

Total: 914ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`smtp-relay.gmail.com`

📌 Glue Records Collected

Total: 10

In-bailiwick: 2 (switch.nic.cat, switch.nic.cat)

Out-of-bailiwick: 8 (cat.ns.nic.es, cat.ns.nic.es, nsc.nic.de...)

Analysis

IP Addresses

mail.codelearn.cat points to two IP numbers: 142.251.179.28 and 2607:f8b0:4004:c1f::1c.

There are other host names — pd-in-f28.1e100.net among them — that share IP numbers with mail.codelearn.cat.

mail.codelearn.cat - dns.ninja