`mail.kernel.inf.br`

	DNSSEC	⚠️ Not signed
	A	2001:bc8:604:1304::1^{🇫🇷 AS128762001:bc8::/32 Scaleway Paris, France}
	A	163.172.149.21^{🇫🇷 AS12876163.172.0.0/16 Scaleway Paris, France}

`kernel.inf.br`

DNSSEC	🔒 Signed (DS record present)
A	2606:4700:3032::6815:5c08^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3033::ac43:b87a^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.92.8^{Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.184.122^{🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`chris.ns.cloudflare.com` ⭐
NS	`dolly.ns.cloudflare.com`
MX	`mail.kernel.inf.br` ⭐
TXT	`google-site-verification=iu_S59qTJm_LEFvknn-zPuTJSKrsr0eBs1jRtQEoCxo`
TXT	`keybase-site-verification=MtctxumYYXJm3wm-_81NU8YjgaCuSn-WVqx7_6AWW3A`
TXT	`v=spf1 ip4:163.172.149.21 include:mail.hntma.com.br include:mail.kernel.inf.b...`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.92.8, 172.67.184.122
		IPv6	2606:4700:3032::6815:5c08, 2606:4700:3033::ac43:b87a
SOA	`chris.ns.cloudflare.com`dns@cloudflare.com serial=2398771527

MX for

kernel.inf.br

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DNS History

2 records (2 active, 0 former)

●A163.172.149.212026-03-28 → 2026-03-29 · 2 obs

● 2026-03-28 00:11:52
● 2026-03-29 10:04:56

●A2001:bc8:604:1304::12026-03-28 → 2026-03-29 · 2 obs

● 2026-03-28 00:11:52
● 2026-03-29 10:04:56

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
br	f.dns.br, c.dns.br, d.dns.br, a.dns.br...	-
kernel.inf.br	chris.ns.cloudflare.com, dolly.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.33.85

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

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 427ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`163.172.149.21`
AAAA	1	`2001:bc8:604:1304::1`

Analysis

Mail Server Role

mail.kernel.inf.br is the mail server for kernel.inf.br.

IP Addresses

mail.kernel.inf.br points to two IPs: 2001:bc8:604:1304::1 and 163.172.149.21.

mail.kernel.inf.br - robtex.com