AS33657 Comcast Cable Communications, LLC

United States CMCS ARIN 29 IPv4 prefixes 247 IPv6 prefixes

IPv4 addresses

11,520

IPv6 /48 networks

247

RPKI

264 valid7 invalid5 no ROA

Peers and downstreams

131

Holder

AS name: CMCS
Description: Comcast Cable Communications, LLC
Organisation: Comcast Cable Communications, LLC
Abuse contact: Not published
Assigned: 2005-02-15
Registered: 2005-02-16
Record last changed: 2021-01-25 20:25 UTC

AS572	Greater Baltimore Medical Center Inc GBMC-TOW
AS1358	Hughes Network Systems, LLC HNSNET-AS
AS2384	Architect of the Capitol AOCNET
AS2703
AS3573	Accenture LLP ACCENTURE
AS3705	U.S. Government Publishing Office GPO-NET
AS4880	Lifeline Systems, Company LIFELINE-ASN
AS4902	CONSERVATION INTERNATIONAL FOUNDATION CI-CCASN
AS4977	Vencore Services and Solutions, Inc. VENCORESS
AS5721	National Defense University NDU-NET
AS6092	Harford Community College HARFORDCC-AS
AS7820	Tower Federal Credit Union TOWERFCU-AS
AS10440	Merkle Inc. MERKLE-INC
AS10918	Accurant Cloud Services LLC ACCURANT
AS11131	University of Maryland Baltimore County (UMBC) UMBC-AS
AS11362	Vector Data Systems LLC VECTOR
AS11790	Random House, Inc. RANDOMHOUSE
AS11951	Medical Computer Systems MCSP
AS12222	Akamai Technologies, Inc. AKAMAI
AS12245	Prmc-Asn PRMC-ASN
AS13511	Univision Communications Inc. UNIVI-2-ASN
AS13582	Cowan Systems, LLC COWAN-ASN
AS13628	AMERISOURCEBERGEN CENCORA-INTERNET
AS14036	Stack AV STACKAV-01
AS14246	Thales Communications Inc. THALESCOMMINC-AS
AS14384	HOST DESIGNS, LLC HOSTDESIGNS
AS14473	Inside The Internet, Inc I3ASN1-200E
AS14830	ProFund Advisors LLC PFA-BETH-AS-1
AS14862	Oceaneering International, Inc. OCEANEERING
AS15134	Prince William County Service Authority PWCSA
AS16409	PBW Communications, LLC PBW-COMMUNICATIONS
AS16463	Data Processing Solutions, Inc. DPSINET
AS16505	HTF HTF-FREDERICK
AS16881	Prall, Inc., David C DAVID-C-PRALL-INTERNET
AS17035	NBCUniversal NBCUNI-17035
AS17190	Washington Metropolitan Area Transit Authority ASN17190
AS18967	Goucher College GOUCHER COLLEGE
AS19316	Quadrangle Development Corporation QUADRANGLE
AS19320	Flextronics International USA, Inc. FLEX-WDF
AS19574	Corporation Service Company CSC
AS19936	Gordon Food Service GORDONFOODS
AS20137	USAGM USAGM-LAN
AS21683	Dalko, LLC DALKO-NETWORKS
AS21963	Agency Insurance Company AS-AGENCYINSURANCEMD-0001
AS22101	Cyber Point International, LLC CPIL-ASN
AS22103	Nextiva, Inc. NEXTIVA
AS22414	Craigslist, Inc. CRAIGS-NET-1
AS22593	Blue Cross and Blue Shield of North Carolina BCBSNC-AS
AS22596	UNIVERSAL HEALTH SERVICES CHR-823
AS22602	Experient Inc. EXPERIENT-INC
AS22613	UNIVERSAL HEALTH SERVICES GWU-055
AS22694	NBCUniversal CNBC
AS22815	Kelly and Associates Insurance Group KELLY-INSURANCE-GROUP
AS22962	The Kennedy Center KENNEDY-NW-DC-US
AS25696
AS25716	Trane Technologies Company LLC INGERSOLL-RAND
AS26020	Space Telescope Science Institute STSCI-NET
AS26114	Anaplan, Inc. ANAPLAN
AS26522	Stevenson University SU-ASN-1
AS26793	ICS Advanced Technologies ICS-LLC
AS26868	NCTA - The Internet & Television Association NCTA-WASHINGTONDC
AS27003	American Bankers Association AMERICAN-BANKERS-ASSOCIATION
AS27016	United States Nuclear Regulatory Commission NRC-NET
AS27026	networkMaryland NETWORKMARYLAND
AS27336	Sentara Healthcare SENTARA-HEALTH-CARE
AS29865	Continental Realty Corporation CONTREALTYCORP
AS30330	Automotive Rentals, Inc. ARI-9000
AS30385	Perdue Farms Incorporated PERDUE-FARMS-INCORPORATED
AS30641	STATE OF DELAWARE STATEOFDE
AS31902	Open Technology Solutions, LLC OTS
AS32073	Mcps-K12-Md-Us MCPS-K12-MD-US
AS32291	ANNE ARUNDEL MEDICAL CENTER ANNEARUNDELMEDICALCENTER
AS32837	Williams & Connolly, LLP WCL-50-AS
AS33170	Morgan State University MORGAN-STATE-UNIVERSITY
AS33174	Prince William County Government Department of IT (DoIT) PRINCE-WILLIAM-COUNTY-VA-ASN
AS33506	COMMPUTERCATIONS CPINETWORKS-AS
AS33512	Gateway Processing Services GATEWAY-PROCESSING-SERVICES
AS33738	United States Holocaust Memorial Museum UNITED-STATES-HOLOCAUST-MEMORIAL-MUSEUM
AS35777	LTN Global Communications Inc LTN-AS
AS36040	Google LLC YOUTUBE
AS36151	The Alta Condominium Unit Owner's Association ACUOA-NET
AS36457	District Photo, Inc. DISTR-21
AS36486	AMTOTE INTERNATIONAL, INC. AMTOTE-AS
AS40391	CHS COOPERATIVES FOUNDATION CHSINC
AS40410	FRIT USFRCS-BGP
AS40833	The New York Times Company NYTD-SEA1
AS40857	IT-CNP, Inc. PAECOM
AS40954	JM Family Enterprises Inc. JMFAMILY
AS42228	Brightstar Limited Brightstar
AS46084	ASRC FEDERAL HOLDING COMPANY, LLC ASRCFH-NET
AS46187	International Spy Museum SPY
AS46200	IT Curves ITC-146
AS46624	Beebe Medical Center Inc. BEEBE-MEDICAL-CENTER
AS46784	Davis Polk & Wardwell, LLP DPW
AS46988	Maryland Institute College of Art MICA-AS
AS53302	Baltimore County Government BALTIMORECOUNTYGOVERNMENT
AS53350	Embassy of Hungary EMBHUN-WAS-01
AS53373	Mathematica, Inc. MATH-INC
AS53862	McDaniel College MCDANIELCOLLEGE
AS54201	We Link Networks LLC WEWORK-MANAGEMENT-LLC
AS54849	Kane Warehousing, Inc KANE-IS-ABLE
AS62957	HOSPITALITY NETWORK, LLC HOSPITALITY-NETWORK
AS63336	Adventist Healthcare ADVENTIST-HEALTHCARE-MARYLAND
AS393432	Nanticoke Memorial Hospital INC NHS14MH
AS393473	Burris Logistics BURRIS-LOGISTICS
AS393706	Nelson Cable, Inc NELSONCABLE
AS393997	Red Coats, Inc REDCOATS
AS394024	American Speech-Language-Hearing Association ASHA-HQ
AS394077	Lifebridge Health, Inc. LIFEBRIDGEHEALTH
AS394112	NTT Global Data Centers Americas, INC. NTT-GLOBAL-DATA-CENTERS-AMERICA-INC
AS394984	Fragomen, Del Rey, Bernsen & Loewy, LLP FDBL-NETWORK
AS395009	Vectorworks, Inc. VECTORWORKS-NET
AS395145	McDonogh School, Inc. MCDONOGH
AS395481	i SW, LLC SUNET
AS396017	Comcast Cable Communications, LLC COMCAST-MES
AS396018	Inovalon Inc. INOVALON
AS396218	National Rifle Association of America NRA
AS396222	Tenable, Inc. TENABLE-NETWORK-SECURITY-INC
AS396514	Carey International, Inc. CI-AS
AS396921	U.S. Customs and Border Protection US-CBP
AS397154	Granules Consumer Health GRANULES-CONSUMER-HEALTH-NET
AS397487	Baltimore Ravens Limited Partnership RAVENS-ASN
AS397934	Latitude AI LLC AAILLC-1
AS398322	Educational Systems Federal Credit Union ESFCU-01
AS398820	Ea-Asn-01 EA-ASN-01
AS400044	Chesapeake Employers Insurance Company AS-CEIWC
AS400467	Iron Bow Technologies, LLC IRONBOWLAB-ASN
AS400678	LIDL US OPERATIONS, LLC IPV4
AS400902	Gaylord National Resort & Convention Center WASGN
AS401366	Vox Flow LLC VOX-FLOW
AS401533	TGS, LLC TGSLLC-02

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade D · 59/100

partly	Prefixes covered by valid ROAs 264 of 276 announced prefixes are RPKI valid, 5 have no ROA.	24/25
fail	No RPKI invalid announcements 7 announced prefixes are RPKI invalid and dropped by networks that validate.	0/10
pass	Announces IPv6 247 IPv6 prefixes.	15/15
pass	More than one upstream 2 upstreams seen in BGP.	10/10
fail	Working abuse contact No abuse contact is published in the registry.	0/15
fail	Publishes a geofeed No geofeed found. Without one, location databases have to guess.	0/10
pass	No prefixes smaller than /24 or /48 All prefixes are /24 (IPv4) or /48 (IPv6) or larger.	10/10
fail	Registry record maintained Last changed 2021-01-25.	0/5

Built from the announced prefixes, RPKI, the registry record and geofeeds. Checks without data are not counted. Also in the API.

Show this on your website

HTML

<a href="https://ip-fd.net/asn/33657"><img src="https://ip-fd.net/badge/asn/33657/health.svg" alt="AS33657 network health on IP-FD.net"></a>

Markdown

[![AS33657 network health](https://ip-fd.net/badge/asn/33657/health.svg)](https://ip-fd.net/asn/33657)

Use rpki.svg instead of health.svg for the RPKI badge.

Routing changes

Last 30 days

No changes recorded in the last 30 days. Changes are recorded each time the routing data of this AS is refreshed. Get alerts in real time.

WHOIS

aut-num:        AS33657
as-name:        CMCS
handle:         AS33657
registrant:     CCCS (Comcast Cable Communications, LLC)
last changed:   2021-01-25T15:25:00-05:00
registration:   2005-02-16T14:59:31-05:00
source:         ARIN (RDAP)

Routing data

Updated 1 days ago

Registry record

Fetched 1 days ago from ARIN RDAP

Prefixes and neighbours come from the RIPE RIS route collectors. Data older than 5 minutes is refreshed when this page is opened.

API

curl -H "X-API-Key: YOUR_KEY" https://ip-fd.net/api/v1/asn/33657

const res = await fetch('https://ip-fd.net/api/v1/asn/33657', {
  headers: { 'X-API-Key': 'YOUR_KEY' }
});
const data = await res.json();
console.log(data);

import requests

r = requests.get('https://ip-fd.net/api/v1/asn/33657', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/33657');
curl_setopt($ch, CURLOPT_HTTPHEADER, ['X-API-Key: YOUR_KEY']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$data = json_decode(curl_exec($ch), true);
print_r($data);

req, _ := http.NewRequest("GET", "https://ip-fd.net/api/v1/asn/33657", nil)
req.Header.Set("X-API-Key", "YOUR_KEY")
res, err := http.DefaultClient.Do(req)
if err != nil {
    log.Fatal(err)
}
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))

Works without a key at a lower rate. Get a free key.

AS3356	Level 3 Parent, LLC LEVEL3
AS7922	Comcast Cable Communications, LLC COMCAST-7922