`xc3.xfinity.com`

DNSSEC	⚠️ Not signed
NS	`ns-1971.awsdns-54.co.uk` ⭐
		A	2600:9000:5307:b300::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-1971.awsdns-54.co.uk`
		A	205.251.199.179^{🇺🇸 Amazon205.251.199.0/24 prefix}
			PTR	`ns-1971.awsdns-54.co.uk`
NS	`ns-1478.awsdns-56.org`
		A	2600:9000:5305:c600::1^{🇺🇸 Amazon2600:9000:5305::/48 - CloudFront}
			PTR	`ns-1478.awsdns-56.org`
		A	205.251.197.198^{🇺🇸 Amazon205.251.197.0/24 prefix}
			PTR	`ns-1478.awsdns-56.org`
NS	`ns-73.awsdns-09.com`
		A	2600:9000:5300:4900::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-73.awsdns-09.com`
		A	205.251.192.73^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-73.awsdns-09.com`
NS	`ns-973.awsdns-57.net`
		A	2600:9000:5303:cd00::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-973.awsdns-57.net`
		A	205.251.195.205^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-973.awsdns-57.net`
MX	`inbound-smtp.us-east-1.amazonaws.com` ⭐
		A	3.211.210.226^{🇺🇸 Amazon3.208.0.0/12 EC2 IAD prefix}
			PTR	`ec2-3-211-210-226.compute-1.amazonaws.com`
		A	44.206.9.87^{🇺🇸 Amazon44.192.0.0/11 EC2 IAD prefix}
			PTR	`ec2-44-206-9-87.compute-1.amazonaws.com`
		A	44.210.166.32^{🇺🇸 Amazon44.192.0.0/11 EC2 IAD prefix}
			PTR	`ec2-44-210-166-32.compute-1.amazonaws.com`
		A	54.164.173.191^{🇺🇸 Amazon54.164.0.0/15 EC2 IAD prefix}
			PTR	`ec2-54-164-173-191.compute-1.amazonaws.com`
		A	54.197.5.236^{🇺🇸 Amazon54.196.0.0/15 EC2 IAD 54.196.0.0/15}
			PTR	`ec2-54-197-5-236.compute-1.amazonaws.com`
MX	`inbound-smtp.us-west-2.amazonaws.com`⁽²⁰⁾
		A	35.161.157.106^{🇺🇸 Amazon35.160.0.0/13 EC2 PDX prefix}
			PTR	`ec2-35-161-157-106.us-west-2.compute.amazonaws.com`
		A	52.13.163.116^{🇺🇸 Amazon52.12.0.0/15 EC2 PDX prefix}
			PTR	`ec2-52-13-163-116.us-west-2.compute.amazonaws.com`
		A	52.43.162.244^{🇺🇸 Amazon52.40.0.0/14 EC2 PDX prefix}
			PTR	`ec2-52-43-162-244.us-west-2.compute.amazonaws.com`
		A	54.188.121.70^{🇺🇸 Amazon54.188.0.0/15 EC2 PDX prefix}
			PTR	`ec2-54-188-121-70.us-west-2.compute.amazonaws.com`
SOA	`ns-1971.awsdns-54.co.uk`awsdns-hostmaster@amazon.com serial=1

`xfinity.com`

	DNSSEC	🔒 Signed (DS record present)
	A	2001:558:feed:dc:96:99:240:155^{🇺🇸 COMCAST-IBONE2001:558::/29 Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054}
	A	96.99.240.155^{🇺🇸 COMCAST-IBONE96.96.0.0/12 Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054}
	NS	`dns101.comcast.net` ⭐
	NS	`dns102.comcast.net`
	NS	`dns103.comcast.net`
	NS	`dns104.comcast.net`
	NS	`dns105.comcast.net`
	MX	`mx1a1.comcast.net` ⭐
	MX	`mx1c1.comcast.net` ⭐
	MX	`mx1h1.comcast.net` ⭐
	MX	`mx2a1.comcast.net` ⭐
	MX	`mx2c1.comcast.net` ⭐
	MX	`mx2h1.comcast.net` ⭐
	TXT	`google-site-verification=jbytp59dW82AQqr9wK5V9-uZhr0wXrCJ7n9U3mUilQg`
	TXT	`google-site-verification=KqEt_C6gzuYBzr08xM7T6e5yXNmsxUAMu8ZtNQejaCs`
	TXT	`v=spf1 -all`
	TXT	`google-site-verification=TdiYkU4LcqtDvZoxDOjjUQwrrUnjS0wTKriu25iH-38`
	TXT	`apple-domain-verification=XqlyQica-2VyxgDz4zdPt1gCVxZ9oHyW13971aF8rbY`
	SOA	`dns101.comcast.net`dnsadmin@comcast.net 2015-04-22 #37

WOT: SAFE (89/100)
rank #3187 globally
rank #1667 in the tld
WOT: SAFE (89/100)
📈 Tranco rank: #1,867

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DNS History

6 records (6 active, 0 former)

●NSns-1478.awsdns-56.org2026-02-21 → 2026-05-14 · 2 obs

● 2026-02-21 12:16:20
● 2026-05-14 14:14:20

●NSns-1971.awsdns-54.co.uk2026-02-21 → 2026-05-14 · 2 obs

● 2026-02-21 12:16:20
● 2026-05-14 14:14:20

●NSns-73.awsdns-09.com2026-02-21 → 2026-05-14 · 2 obs

● 2026-02-21 12:16:20
● 2026-05-14 14:14:20

●NSns-973.awsdns-57.net2026-02-21 → 2026-05-14 · 2 obs

● 2026-02-21 12:16:20
● 2026-05-14 14:14:20

●MXinbound-smtp.us-east-1.amazonaws.com2026-02-21 → 2026-05-14 · 2 obs

● 2026-02-21 12:16:20
● 2026-05-14 14:14:20

●MXinbound-smtp.us-west-2.amazonaws.com2026-02-21 → 2026-05-14 · 2 obs

● 2026-02-21 12:16:20
● 2026-05-14 14:14:20

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
xfinity.com	dns101.comcast.net, dns102.comcast.net, dns103.comcast.net, dns104.comcast.net...	-
xc3.xfinity.com	ns-73.awsdns-09.com, ns-1971.awsdns-54.co.uk, ns-1478.awsdns-56.org, ns-973.awsdns-57.net	-

✅ Authoritative Response

Server:205.251.199.179

NS records: ns-73.awsdns-09.com, ns-1971.awsdns-54.co.uk, ns-1478.awsdns-56.org, ns-973.awsdns-57.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for xc3.xfinity.com (unsigned zone)

⏱️ Timing

Total: 470ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	4	`ns-1478.awsdns-56.org, ns-1971.awsdns-54.co.uk...`
MX	2	`inbound-smtp.us-east-1.amazonaws.com (pr, inbound-smtp.us-west-2.amazonaws.com (pr`
SOA	1	`ns-1971.awsdns-54.co.uk awsdns-hostmaste`