`flex.comcast.com`

DNSSEC	⚠️ Not signed
NS	`ns-1350.awsdns-40.org` ⭐
		A	2600:9000:5305:4600::1^{🇺🇸 Amazon2600:9000:5305::/48 - CloudFront}
			PTR	`ns-1350.awsdns-40.org`
		A	205.251.197.70^{🇺🇸 Amazon205.251.197.0/24 prefix}
			PTR	`ns-1350.awsdns-40.org`
NS	`ns-1772.awsdns-29.co.uk`
		A	2600:9000:5306:ec00::1^{🇺🇸 Amazon2600:9000:5306::/48 - CloudFront}
			PTR	`ns-1772.awsdns-29.co.uk`
		A	205.251.198.236^{🇺🇸 Amazon205.251.198.0/24 prefix}
			PTR	`ns-1772.awsdns-29.co.uk`
NS	`ns-41.awsdns-05.com`
		A	2600:9000:5300:2900::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-41.awsdns-05.com`
		A	205.251.192.41^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-41.awsdns-05.com`
NS	`ns-936.awsdns-53.net`
		A	2600:9000:5303:a800::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-936.awsdns-53.net`
		A	205.251.195.168^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-936.awsdns-53.net`
SOA	`ns-1350.awsdns-40.org`awsdns-hostmaster@amazon.com serial=1

`comcast.com`

	DNSSEC	🔒 Signed (DS record present)
	A	96.99.227.0^{🇺🇸 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	`mxa-00143702.gslb.pphosted.com` ⭐
	MX	`mxb-00143702.gslb.pphosted.com` ⭐
	TXT	`smartsheet-site-validation=x1Hv84--jB9jvo7M0QQviDXPy_81zS_t`
	TXT	`teamviewer-sso-verification=4a24e296450940f48ac4faba9a172fc0`
	TXT	`facebook-domain-verification=f1zw72g52fjiesmld6xtuj467pl7f5`
	TXT	`mongodb-site-verification=ucqyDX29txaTTi3K4euWVtieT0zCXRrg`
	TXT	`apple-domain-verification=VNdTgwsxrDHE4eJM`
	TXT	`apple-domain-verification=XRKeuEf5cWtc2oDC`
	TXT	`aws-domain-verification=c326827a-0d9a-4061-a35d-1ea2a8afc6f5`
	TXT	`intersight=3c7c5c60389a6b81830ef696f8761bc121ecf3f10d7cf8eef08f66af90451a8f`
	TXT	`atlassian-domain-verification=J+tB36tc4CyLsnqZ/MTW5tI3SZ+IOFAGTWEgMbo+FLRl+gv...`
	TXT	`paloaltonetworks-site-verification=b6c919476067691db128e9375b002b801db8ab2a1d...`
	TXT	`atlassian-domain-verification=xhDGO0SgEPXcuSpqqvu7kAzZyKrM2pat53VPEt5XvKGHvOq...`
	TXT	`airtable-verification=31e52307c66bf62d16697b7f0439d35e`
	TXT	`amazonses:RYuDm+T3xJC87y0v4Cj4JlDm9d5enVzIZcr/arCF7J0=`
	TXT	`openai-domain-verification=dv-z3jR2RoYFRLipmXTqN9mx5hU`
	TXT	`docker-verification=f79a60d9-69ec-4c26-8d54-0165c0943613`
	TXT	`paloaltonetworks-site-verification=b51e185f274a13eccff6f0e001549d4a2f08fc11c5...`
	TXT	`v=spf1 ip4:148.163.145.77 ip4:148.163.141.77 ip4:162.150.44.71 ip4:96.114.158...`
	TXT	`airtable-verification=709aa8e31ed274aa8abc0f3a9286141f`
	TXT	`autodesk-domain-verification=9qi_qkHrCGa8onVbz33s`
	TXT	`browserstack-domain-verification=e23475d1-ef64-4cf7-bf92-7620239fe86a`
	TXT	`airtable-verification=644c0c83b6807a2a10c20d4cf57505d7`
	TXT	`1password-site-verification=3BCX5ACVKBD73ADOMJ5XWM7JJ4`
	TXT	`airtable-verification=d9386eea22fce5ee0d01209512aa7706`
	TXT	`pendo-domain-verification=XM4f85DQvo0VLA8QzSh-M0bjGEs`
	TXT	`eYZbzQ91r/pvvnV/FdrbHyREx7EaAwWLeNYk/EMQrJiGpNCsX4tJcWlHJDFzifTDbfnlhI6koqrm0...`
	TXT	`atlassian-domain-verification=C34TI2IiJOrziv9uyV2Yva6ZoRRCSZPjqc15wZASQfypHgN...`
	TXT	`al0yn+08kj3q/n1E+s02ttnE5Fd9gIjwjjbn4mCggizGLJepyQ7cMxRTgw4RxYVoZ965qJIHfnH09...`
	TXT	`adobe-idp-site-verification=8c9c59d410322404f7d75a0b3c770ce7b87cf141707b58224...`
	TXT	`google-site-verification=XdqEZdbhoNgKou31_aOrVN98TKJqxC0Ve3hNPBmSM7M`
	TXT	`atlassian-domain-verification=n+yfnu4Su0J6uQkiatjL+lTNjzOZrPUGOpVn+HiHPwwDgMi...`
	TXT	`docusign=8fb076b3-05e6-41c4-a6ee-6f6227be4b11`
	TXT	`docusign=0ead29a6-1c9c-4b0c-865a-85a5a127e776`
	SOA	`dns101.comcast.net`domregtech@comcastonline.com serial=2009104660

WOT: SAFE (88/100)
rank #4948 globally
rank #2483 in the tld
WOT: SAFE (88/100)
📈 Tranco rank: #692

Comcast Corporation

Comcast Corporation is one of the largest telecommunications and media conglomerates in the United States. Founded in 1963 in Tupelo, Mississippi, it has grown into a global company headquartered in Philadelphia, Pennsylvania. The company operates primarily through its Xfinity brand for consumer services and NBCUniversal for media and entertainment.

Key Services

Internet: High-speed broadband through Xfinity, one of the largest ISPs in the US
Television: Cable TV and streaming services including Peacock
Phone: VoIP and mobile phone services
Business Services: Enterprise networking, data centers, and managed services
Media & Entertainment: NBCUniversal studios, theme parks, and broadcast networks

Technical Infrastructure

The domain operates its own authoritative DNS infrastructure with five nameservers (dns101-105.comcast.net), all hosted on Comcast's backbone network with full IPv4 and IPv6 support. Email is handled through Proofpoint's cloud security platform (pphosted.com). The domain is DNSSEC-signed and maintains extensive TXT records for third-party service verification including AWS, Google, Docker, and Adobe integrations.

Network

The primary domain resolves to Comcast's IBONE (Internet Backbone) network. As one of the largest Tier 1 network operators, Comcast operates AS7922 (COMCAST-7922) which is one of the most significant autonomous systems in the global internet routing table.

Subdomains

fui-prod.flex.comcast.com

Same first word

flex.co.jp

flex.co.il

flex.sk

flex.cloud

flex.bz

flex.finance

flex.me.uk

flex.ps

flex.club

flex.company

flex.bg

flex.ru

flex.exchange

flex.ro

flex.lol

flex.me

flex.hk

flex.com

flex.com.cn

flex.catering

flex.inc

flex.ma

flex.es

flex.email

flex.tools

flex.amazon

flex.ae

flex.cool

flex.de

flex.business

flex.trade

flex.com.au

flex.nl

flex.com.tr

flex.run

flex.it

flex.jp

flex.ge

flex.pl

flex.swiss

flex.cn

flex.bm

flex.com.br

flex.agency

flex.equipment

flex.ws

flex.ac

flex.com.my

flex.capital

flex.group

flex.io

flex.insure

flex.money

flex.se

flex.gg

flex.cl

flex.ch

flex.ca

flex.dk

flex.at

flex.no

flex.as

flex.cz

flex.ie

flex.etc.br

flex.pro

flex.co.uk

flex.dev

flex.pt

flex.org.cn

flex.systems

flex.care

flex.bi

flex.team

flex.physio

flex.rs

flex.ru.com

flex.works

flex.la

flex.si

flex.eu

flex.net

flex.bet

flex.ee

flex.network

flex.city

flex.ec

flex.lt

flex.fund

flex.hu

flex.in

flex.gr

flex.fitness

flex.legal

flex.com.ar

flex.by

flex.rentals

flex.one

flex.movie

flex.mba

Similar names

xelf.ru

xelf.de

xfel.de

exfl.com

fexl.com

eflx.com

exfl.cn

exlf.com

flxe.com

flex.co

flex.school

flex.im

flex.org.au

flex.life

fexl.de

flex.world

xelf.org

felx.de

fxel.net

flex.co.tz

flex.kz

flex.technology

flex.org

fexl.tokyo

flex.land

flex.ai

fxle.com

flex.support

flex.bike

flex.cafe

lfex.com.cn

xlef.com

elxf.cn

xfel.com

xelf.ca

xlfe.com

xlfe.net

xfel.info

xefl.com

felx.com

elfx.ru

exfl.kr

lxfe.com

fxel.com

xelf.com

fexl.net

elxf.com

elfx.cn

xelf.io

xelf.info

xfel.jp

lefx.de

lfex.com

exlf.cn

felx.ru

felx.org

elfx.de

xfel.eu

DNS History

4 records (4 active, 0 former)

●NSns-1350.awsdns-40.org2026-04-04 → 2026-04-24 · 2 obs

● 2026-04-04 14:36:48
● 2026-04-24 00:44:16

●NSns-1772.awsdns-29.co.uk2026-04-04 → 2026-04-24 · 2 obs

● 2026-04-04 14:36:48
● 2026-04-24 00:44:16

●NSns-41.awsdns-05.com2026-04-04 → 2026-04-24 · 2 obs

● 2026-04-04 14:36:48
● 2026-04-24 00:44:16

●NSns-936.awsdns-53.net2026-04-04 → 2026-04-24 · 2 obs

● 2026-04-04 14:36:48
● 2026-04-24 00:44:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
comcast.com	dns101.comcast.net, dns102.comcast.net, dns103.comcast.net, dns104.comcast.net...	-
flex.comcast.com	ns-1772.awsdns-29.co.uk, ns-1350.awsdns-40.org, ns-41.awsdns-05.com, ns-936.awsdns-53.net	-

✅ Authoritative Response

Server:205.251.192.41

NS records: ns-1772.awsdns-29.co.uk, ns-1350.awsdns-40.org, ns-41.awsdns-05.com, ns-936.awsdns-53.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for flex.comcast.com (unsigned zone)

⏱️ Timing

Total: 730ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	4	`ns-1350.awsdns-40.org, ns-1772.awsdns-29.co.uk...`
SOA	1	`ns-1350.awsdns-40.org awsdns-hostmaster.`

Analysis

Hierarchy

The parent of fui-prod.flex.comcast.com is flex.comcast.com.

Name Servers

flex.comcast.com's delegation is handled by four name servers: ns-41.awsdns-05.com, ns-936.awsdns-53.net, ns-1350.awsdns-40.org and ns-1772.awsdns-29.co.uk.

flex.comcast.com partially shares name servers with other domains; examples include archeage.com, thebusinessjournalofcharlotte.com, instore.cl, turnerjobs.com and aaryagawas.com.

Host names with two IPs:

ns-41.awsdns-05.com points to 2600:9000:5300:2900::1 and 205.251.192.41

ns-936.awsdns-53.net points to 2600:9000:5303:a800::1 and 205.251.195.168

ns-1350.awsdns-40.org points to 2600:9000:5305:4600::1 and 205.251.197.70

ns-1772.awsdns-29.co.uk points to 2600:9000:5306:ec00::1 and 205.251.198.236

flex.comcast.com - robtex.com

flex.comcast.com

comcast.com

Comcast Corporation

Key Services

Technical Infrastructure

Network

Subdomains

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

Hierarchy

Name Servers

`flex.comcast.com`

`comcast.com`